JP6797370B2 - Water treatment agent composition for cyan-containing wastewater - Google Patents
Water treatment agent composition for cyan-containing wastewater Download PDFInfo
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- JP6797370B2 JP6797370B2 JP2016120147A JP2016120147A JP6797370B2 JP 6797370 B2 JP6797370 B2 JP 6797370B2 JP 2016120147 A JP2016120147 A JP 2016120147A JP 2016120147 A JP2016120147 A JP 2016120147A JP 6797370 B2 JP6797370 B2 JP 6797370B2
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- 239000000203 mixture Substances 0.000 title claims description 106
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 96
- 239000003795 chemical substances by application Substances 0.000 title claims description 85
- 239000002351 wastewater Substances 0.000 title claims description 57
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 claims description 55
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 10
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 10
- 229940045803 cuprous chloride Drugs 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 150000007522 mineralic acids Chemical class 0.000 claims description 8
- 150000007524 organic acids Chemical class 0.000 claims description 8
- 235000010265 sodium sulphite Nutrition 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 3
- OTCKOJUMXQWKQG-UHFFFAOYSA-L magnesium bromide Chemical compound [Mg+2].[Br-].[Br-] OTCKOJUMXQWKQG-UHFFFAOYSA-L 0.000 claims description 3
- 229910001623 magnesium bromide Inorganic materials 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 1
- 150000001408 amides Chemical class 0.000 claims 1
- 238000003860 storage Methods 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- 150000003839 salts Chemical class 0.000 description 9
- 239000011261 inert gas Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000004065 wastewater treatment Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910001617 alkaline earth metal chloride Inorganic materials 0.000 description 4
- 150000001879 copper Chemical class 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001513 alkali metal bromide Inorganic materials 0.000 description 2
- 229910001616 alkaline earth metal bromide Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- -1 cyanide compound Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002195 soluble material Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical class [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241001653678 Russula emetica Species 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001510 metal chloride Inorganic materials 0.000 description 1
- UQQALTRHPDPRQC-UHFFFAOYSA-N nitrogen tribromide Chemical compound BrN(Br)Br UQQALTRHPDPRQC-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Description
本開示は、シアン含有廃水用の水処理剤組成物、及び、シアン含有処理廃水の処理方法に関する。 The present disclosure relates to a water treatment agent composition for cyan-containing wastewater and a method for treating cyan-containing treated wastewater.
シアンは生態系に強い悪影響を及ぼすため、シアン含有廃水を自然界にそのまま放出することはできない。シアンについては水質汚濁防止法に基づき排水基準が定められており、この基準（１ｍｇ／Ｌ以下）を満たすようにシアン除去処理を行い、無害化した廃水でなければ下水などに排出できないことになっている。また、条例により、上記排水基準値よりもさらに低い上乗せ排水基準を定めている地域も数多くある。 Cyan has a strong adverse effect on the ecosystem, so cyan-containing wastewater cannot be released into the natural world as it is. For cyanide, wastewater standards have been established based on the Water Pollution Control Law, and cyanide removal treatment is performed so as to meet this standard (1 mg / L or less), and only detoxified wastewater can be discharged into sewage. ing. In addition, there are many areas where the ordinance sets additional drainage standards that are even lower than the above drainage standard values.
シアン含有廃水中のシアンの除去処理方法として、特許文献１は、遊離シアン及びシアン錯塩を含有する廃水に、実質的に亜鉛の添加及びオゾン処理を行うことなく、廃水中のシアンとの反応当量以上の２価の銅塩及び還元剤を添加し、難溶性の沈殿を生成させて分離することを特徴とする処理方法を開示する。 As a method for removing cyanide from cyanide-containing wastewater, Patent Document 1 describes the reaction equivalent of cyanide with cyanide in the wastewater without substantially adding zinc and ozone treatment to the wastewater containing free cyanide and cyanide complex salt. Disclosed is a treatment method characterized by adding the above divalent copper salt and a reducing agent to generate a sparingly soluble precipitate and separating it.
また、特許文献２は、シアン含有廃水に、該廃水に含まれるシアンを除去し得る量の第二鉄塩及び第一銅塩を１６：１〜１：１の重量割合で添加した後、該廃水のｐＨを６〜８に調整し、生成した水不溶性塩を廃水から除去して、該廃水中のシアンを除去することを特徴とするシアン含有廃水の処理方法を開示する。 Further, in Patent Document 2, after adding ferric iron salt and ferrous salt in an amount capable of removing cyanide contained in the wastewater to the cyanide-containing wastewater at a weight ratio of 16: 1 to 1: 1. Disclosed is a method for treating cyanide-containing wastewater, which comprises adjusting the pH of wastewater to 6 to 8 and removing the produced water-insoluble salt from the wastewater to remove cyanide in the wastewater.
遊離シアン及びシアン錯塩を含有する廃液（以下、「シアン含有廃液」という）で、シアンと難溶性の沈殿を形成するのは、一価の銅塩である。そこで、シアン含有廃水を簡便に処理するために、一価の銅塩を含有する水処理剤組成物を調製したところ、沈殿、にごり、又はその両方が発生し、製剤として安定性の向上が必要であるという問題が見出された。 It is a monovalent copper salt that forms a sparingly soluble precipitate with cyanide in a effluent containing free cyanide and a cyanide complex (hereinafter referred to as "cyanide-containing effluent"). Therefore, when a water treatment agent composition containing a monovalent copper salt was prepared in order to easily treat the cyan-containing wastewater, precipitation, turbidity, or both were generated, and it was necessary to improve the stability of the preparation. The problem was found.
本開示は、一又は複数の実施形態において、安定性が向上した、一価の銅塩を含有するシアン含有廃水用の水処理剤組成物を提供する。 The present disclosure provides a water treatment composition for cyanide-containing wastewater containing a monovalent copper salt with improved stability in one or more embodiments.
本開示は、一態様において、シアン含有廃水用の水処理剤組成物であって、
（Ａ）塩化第一銅、
（Ｂ）アルカリ金属塩化物、アルカリ金属臭化物、アルカリ土類金属塩化物、及びアルカリ土類金属臭化物からなる群から選ばれる少なくとも１つ、並びに、
（Ｃ）無機酸及び／又は有機酸
を含有し、
前記（Ｃ）無機酸及び／又は有機酸の前記水処理剤組成物における含有量が、１０重量％以下であり、かつ、前記水処理剤組成物のｐＨが２以下である水処理剤組成物（以下、「本開示に係る水処理剤組成物」ともよぶ）に関する。
The present disclosure is, in one aspect, a water treatment composition for cyanide-containing wastewater.
(A) Copper chloride,
(B) At least one selected from the group consisting of alkali metal chlorides, alkali metal bromides, alkaline earth metal chlorides, and alkaline earth metal bromides, and
(C) Contains inorganic and / or organic acids
A water treatment agent composition in which the content of the (C) inorganic acid and / or organic acid in the water treatment agent composition is 10% by weight or less and the pH of the water treatment agent composition is 2 or less. (Hereinafter, also referred to as "water treatment agent composition according to the present disclosure").
本開示は、その他の一態様において、シアン含有廃水に、該廃水中のシアンとの反応当量以上の塩化第一銅となるように本開示に係る水処理剤組成物を添加し、シアンの難溶性物質を生成させ該難溶性物質を分離することを含む、シアン含有廃水の処理方法に関する。 In another aspect of the present disclosure, the water treatment agent composition according to the present disclosure is added to cyanide-containing wastewater so that the amount of cuprous chloride is equal to or greater than the reaction equivalent to cyanide in the wastewater. The present invention relates to a method for treating cyanide-containing wastewater, which comprises producing a soluble substance and separating the poorly soluble substance.
本開示のシアン含有廃水用の水処理剤組成物は、一又は複数の実施形態において、沈殿及び濁りが抑制され、製剤としての安定性が向上するという効果を奏しうる。本開示のシアン含有廃水用の水処理剤組成物は、一又は複数の実施形態において、さらに、取扱性が向上するという効果を奏し得る。 The water treatment composition for cyanide-containing wastewater of the present disclosure may have the effect of suppressing precipitation and turbidity and improving stability as a preparation in one or more embodiments. The water treatment agent composition for cyanide-containing wastewater of the present disclosure may further have the effect of improving handleability in one or more embodiments.
本開示は、シアン含有廃水を処理するために第一銅塩を含有する製剤を調製した場合に濁りや沈殿が発生するという問題が、アルカリ金属塩化物及び酸を所定量含有させることにより解消されうるという知見に基づく。 In the present disclosure, the problem that turbidity and precipitation occur when a preparation containing a cuprous salt is prepared for treating cyanide-containing wastewater is solved by containing a predetermined amount of alkali metal chloride and acid. Based on the finding that it is possible.
［シアン含有廃水］
本開示において処理対象となるシアン含有廃水としては、製鉄工場、化学工場、メッキ工場、コークス製造工場、金属表面処理工場などから排出される廃水が挙げられ、一又は複数の実施形態において、金属のシアン化合物、シアンイオン、シアン錯塩、シアノ錯イオンなどを含むシアン含有廃水が挙げられる。本開示に係る水処理剤組成物は、一又は複数の実施形態において、コークス炉廃水のような緩衝作用の強いシアン含有廃水の処理をも好適に行なうことができる。
[Cyan-containing wastewater]
Examples of the cyanide-containing wastewater to be treated in the present disclosure include wastewater discharged from iron making factories, chemical factories, plating factories, coke manufacturing factories, metal surface treatment factories, etc., and in one or more embodiments, of metal. Examples thereof include cyanide-containing wastewater containing a cyanide compound, cyanide ion, cyanide complex salt, and cyanide complex ion. In one or more embodiments, the water treatment agent composition according to the present disclosure can also suitably treat cyan-containing wastewater having a strong buffering action, such as coke oven wastewater.
［成分Ａ：塩化第一銅］
本開示に係る水処理剤組成物における成分Ａは、塩化第一銅である。一価の銅イオンは、廃水中の遊離シアンやシアン錯塩等と接触して難溶性物質を形成する。該難溶性物質は、一又は複数の実施形態において、沈殿である。該難溶性物質を除去することで、廃水中からシアンを除去できる。
[Component A: Copper chloride]
The component A in the water treatment agent composition according to the present disclosure is cuprous chloride. The monovalent copper ion comes into contact with free cyanide, cyanide complex salt, etc. in the wastewater to form a sparingly soluble substance. The sparingly soluble material is, in one or more embodiments, a precipitate. By removing the sparingly soluble substance, cyanide can be removed from the wastewater.
本開示に係る水処理剤組成物における成分Ａの含有量は、一又は複数の実施形態において、該組成物の安定性向上の点から、好ましくは１．５重量％以上、より好ましくは５重量％以上１５重量％以下である。 The content of component A in the water treatment agent composition according to the present disclosure is preferably 1.5% by weight or more, more preferably 5% by weight, in one or more embodiments, from the viewpoint of improving the stability of the composition. % Or more and 15% by weight or less.
［成分Ｂ：アルカリ金属塩化物等］
本開示に係る水処理剤組成物における成分Ｂは、アルカリ金属塩化物、アルカリ金属臭化物、アルカリ土類金属塩化物、及びアルカリ土類金属臭化物からなる群から選ばれる少なくとも１つであり、例えば、塩化ナトリウム、塩化カルシウム、塩化マグネシウム、臭化ナトリウム、及び臭化マグネシウムなどが挙げられる。成分Ｂは一種類であってもよく、二種類以上であってもよい。本開示に係る水処理剤組成物における成分Ｂは、一又は複数の実施形態において、該組成物の安定性向上の点から、アルカリ金属塩化物及びアルカリ土類金属塩化物からなる群から選ばれる少なくとも１つであることが好ましい。アルカリ金属塩化物及びアルカリ土類金属塩化物としては、一又は複数の実施形態において、塩化ナトリウム、塩化カルシウム、及び塩化マグネシウムが挙げられる。
[Component B: Alkali metal chloride, etc.]
The component B in the water treatment agent composition according to the present disclosure is at least one selected from the group consisting of alkali metal chloride, alkali metal bromide, alkaline earth metal chloride, and alkaline earth metal bromide, for example. Examples thereof include sodium chloride, calcium chloride, magnesium chloride, sodium bromide, and magnesium bromide. The component B may be one kind or two or more kinds. The component B in the water treatment agent composition according to the present disclosure is selected from the group consisting of alkali metal chlorides and alkaline earth metal chlorides in one or more embodiments from the viewpoint of improving the stability of the composition. At least one is preferable. Alkaline metal chlorides and alkaline earth metal chlorides include, in one or more embodiments, sodium chloride, calcium chloride, and magnesium chloride.
本開示に係る水処理剤組成物における成分Ｂの含有量は、一又は複数の実施形態において、該組成物の安定性向上の点から、好ましくは１重量％以上４５重量％以下、より好ましくは１重量％以上３５重量％以下である。 In one or more embodiments, the content of component B in the water treatment agent composition according to the present disclosure is preferably 1% by weight or more and 45% by weight or less, more preferably, from the viewpoint of improving the stability of the composition. It is 1% by weight or more and 35% by weight or less.
［成分Ｃ：酸］
本開示に係る水処理剤組成物における成分Ｃは、無機酸、有機酸、又は無機酸及び有機酸の組み合わせである。成分Ｃは一種類であってもよく、二種類以上であってもよい。無機酸としては、一又は複数の実施形態において、塩酸、硝酸、及び硫酸が挙げられ、有機酸としては、一又は複数の実施形態において、オキシカルボン酸、多価カルボン酸、アミノポリカルボン酸、及びアミノ酸が挙げられる。
[Component C: Acid]
The component C in the water treatment agent composition according to the present disclosure is an inorganic acid, an organic acid, or a combination of an inorganic acid and an organic acid. The component C may be one kind or two or more kinds. Examples of the inorganic acid include hydrochloric acid, nitric acid, and sulfuric acid in one or more embodiments, and examples of the organic acid include oxycarboxylic acid, polyvalent carboxylic acid, and aminopolycarboxylic acid in one or more embodiments. And amino acids.
本開示に係る水処理剤組成物における成分Ｃの含有量は、一又は複数の実施形態において、該組成物の安定性向上の点から、好ましくは該水処理剤組成物のｐＨが２以下となる量である。本開示に係る水処理剤組成物における成分Ｃの含有量は、一又は複数の実施形態において、該組成物の取扱性向上の点から、好ましくは劇物に指定されない濃度であり、より好ましくは１０重量％以下、さらに好ましくは５重量％以下、さらにより好ましくは１重量％以下である。 The content of component C in the water treatment agent composition according to the present disclosure is preferably such that the pH of the water treatment agent composition is 2 or less from the viewpoint of improving the stability of the composition in one or more embodiments. Is the amount. The content of component C in the water treatment agent composition according to the present disclosure is preferably a concentration not specified as a deleterious substance in one or more embodiments from the viewpoint of improving the handleability of the composition, and more preferably. It is 10% by weight or less, more preferably 5% by weight or less, and even more preferably 1% by weight or less.
［成分Ｄ：亜硫酸ナトリウム］
本開示に係る水処理剤組成物は、一又は複数の実施形態において、該組成物の安定性向上の点から、成分Ｄとして亜硫酸ナトリウム又は水溶液中で亜硫酸ナトリウムを生成する化合物（重亜硫酸ナトリウムなど）を含有してもよい。
[Component D: Sodium sulfite]
The water treatment agent composition according to the present disclosure is a compound (sodium sulfite, etc.) that produces sodium sulfite as component D or sodium sulfite in an aqueous solution in one or more embodiments from the viewpoint of improving the stability of the composition. ) May be contained.
本開示に係る水処理剤組成物における成分Ｄの含有量は、一又は複数の実施形態において、該組成物の安定性向上の点から、好ましくは１重量％以下、より好ましくは０．１重量％以下、さらに好ましくは０．０１重量％以下、さらにより好ましくは０．００５重量％以下である。 The content of component D in the water treatment agent composition according to the present disclosure is preferably 1% by weight or less, more preferably 0.1% by weight, in one or more embodiments, from the viewpoint of improving the stability of the composition. % Or less, more preferably 0.01% by weight or less, still more preferably 0.005% by weight or less.
［成分Ｅ：水］
本開示に係る水処理剤組成物は、上述の成分Ａ〜Ｃ又はＡ〜Ｄ以外は水（成分Ｅ）であってよい。水は、工業用水、水道水、蒸留水、イオン交換水、又は超純水等が使用され得る。あるいは、本開示に係る水処理剤組成物は、該組成物の安定性を阻害しない範囲で、成分Ａ〜Ｅ以外に下記のその他の成分を含んでもよい。
[Component E: Water]
The water treatment agent composition according to the present disclosure may be water (component E) other than the above-mentioned components A to C or A to D. As the water, industrial water, tap water, distilled water, ion-exchanged water, ultrapure water, or the like can be used. Alternatively, the water treatment agent composition according to the present disclosure may contain the following other components in addition to the components A to E as long as the stability of the composition is not impaired.
［その他の成分］
本開示に係る水処理剤組成物は、本発明の効果を阻害しない範囲で、防錆剤、腐食防止剤、スケール分散剤、スライムコントロール剤などの公知の薬剤を併用してもよい。
[Other ingredients]
The water treatment agent composition according to the present disclosure may be used in combination with known agents such as rust preventives, corrosion inhibitors, scale dispersants, and slime control agents as long as the effects of the present invention are not impaired.
［ｐＨ］
本開示に係る水処理剤組成物は、該組成物の安定性向上の点から、ｐＨが２以下であり、好ましくは１．７以下である。
[PH]
The water treatment agent composition according to the present disclosure has a pH of 2 or less, preferably 1.7 or less, from the viewpoint of improving the stability of the composition.
本開示に係る水処理組成物は、一又は複数の実施形態において、濃縮物として流通してもよい。本開示に係る水処理組成物の濃縮物は、一又は複数の実施形態において、使用時に上記成分Ａ〜Ｄが上述した含有量になるように希釈して使用することができる。 The water treatment composition according to the present disclosure may be distributed as a concentrate in one or more embodiments. In one or more embodiments, the concentrate of the water treatment composition according to the present disclosure can be diluted and used so that the above-mentioned components A to D have the above-mentioned contents at the time of use.
[水処理剤組成物の調製]
本開示に係る水処理剤組成物は、上記成分Ａ〜Ｅを混合することで調製できる。本開示に係る水処理剤組成物の調製の一又複数の実施形態において、より安定性の高い水処理剤組成物を得るために、窒素ガスによるバブリング処理をしてもよい。
[Preparation of water treatment agent composition]
The water treatment agent composition according to the present disclosure can be prepared by mixing the above components A to E. In one or more embodiments of the preparation of the water treatment agent composition according to the present disclosure, a bubbling treatment with nitrogen gas may be performed in order to obtain a more stable water treatment agent composition.
本開示に係る水処理剤組成物は、一又は複数の実施形態において、ポリタンク等の容器内に入れて保管してもよいし、貯蔵タンクやコンテナ等に入れてその状態で使用してもよい。
一又複数の実施形態において、ポリタンク等の容器内でより長期間安定性を保った状態で保管可能にする観点から、本開示に係る水処理剤組成物をポリタンク等の容器に導入した後、容器の空間内を窒素又はアルゴン等の不活性ガスでパージ（置換）してもよい。よって、本開示に係る水処理剤組成物の一又は複数の実施形態として、不活性ガスでパージされた容器に配置された形態が挙げられる。
一又複数の実施形態において、貯蔵タンクやコンテナ等に入れてより長期間安定性を保った状態で使用可能にする観点から、本開示に係る水処理剤組成物を貯蔵タンクやコンテナ等に導入した後、窒素又はアルゴン等の不活性ガスによって貯蔵タンクやコンテナの空間内を大気圧よりも微加圧状態（１〜５ｋＰａ）にしてもよい。微加圧状態は、一又は複数の実施形態において、貯蔵タンクやコンテナに配置した不活性ガスボンベにレギュレーター（精密圧力調整器）及びニードルバルブ付き流量計を取り付けることにより維持することができる。よって、本開示に係る水処理剤組成物の一又は複数の実施形態として、微加圧状態に維持された容器に配置された形態が挙げられる。
In one or more embodiments, the water treatment agent composition according to the present disclosure may be stored in a container such as a plastic tank, or may be stored in a storage tank or container and used in that state. ..
In one or more embodiments, after introducing the water treatment agent composition according to the present disclosure into a container such as a plastic tank, from the viewpoint of enabling storage in a container such as a plastic tank in a state of maintaining stability for a longer period of time. The space of the container may be purged (replaced) with an inert gas such as nitrogen or argon. Therefore, one or a plurality of embodiments of the water treatment agent composition according to the present disclosure include a form in which the water treatment agent composition is placed in a container purged with an inert gas.
In one or more embodiments, the water treatment agent composition according to the present disclosure is introduced into a storage tank, container, etc. from the viewpoint of being placed in a storage tank, container, etc. and used in a state of maintaining stability for a longer period of time. After that, the space of the storage tank or container may be slightly pressurized (1 to 5 kPa) from the atmospheric pressure by using an inert gas such as nitrogen or argon. The micropressurized state can be maintained in one or more embodiments by attaching a regulator (precision pressure regulator) and a flow meter with a needle valve to an inert gas cylinder arranged in a storage tank or container. Therefore, as one or more embodiments of the water treatment agent composition according to the present disclosure, there is a form in which the water treatment agent composition is placed in a container maintained in a slightly pressurized state.
本開示は、一態様において、上記成分Ａ〜Ｃ、必要に応じて成分Ｄ及びＥを混合することを含む、シアン含有廃水用の水処理剤組成物の調製方法に関する。本開示に係る水処理剤組成物の調製方法は、一又は複数の実施形態において、混合した組成物をポリタンク等の容器に配置すること、及び組成物を配置した容器内を不活性ガスでパージすることを含んでいてもよい。また、本開示に係る水処理剤組成物の調製方法は、一又は複数の実施形態において、上記成分Ａ〜Ｃ、必要に応じて成分Ｄ及びＥを混合して得られた組成物が配置された貯蔵タンク又はコンテナ等の空間内を、不活性ガスによって大気圧よりも微加圧状態にすることを含んでいてもよい。微加圧状態としては、一又は複数の実施形態において、大気圧よりも１〜５ｋＰａ又は２〜５ｋＰａ加圧した状態が挙げられる。 The present disclosure relates to a method for preparing a water treatment agent composition for cyanide-containing wastewater, which comprises mixing the above components A to C and, if necessary, components D and E in one embodiment. In the method for preparing the water treatment agent composition according to the present disclosure, in one or more embodiments, the mixed composition is placed in a container such as a plastic tank, and the inside of the container in which the composition is placed is purged with an inert gas. May include doing. Further, in the method for preparing the water treatment agent composition according to the present disclosure, in one or a plurality of embodiments, the compositions obtained by mixing the above components A to C and, if necessary, components D and E are arranged. It may include making the space such as a storage tank or a container slightly pressurized by an inert gas rather than the atmospheric pressure. Examples of the slightly pressurized state include a state in which the pressure is 1 to 5 kPa or 2 to 5 kPa higher than the atmospheric pressure in one or more embodiments.
［シアン含有廃水の処理方法］
本開示に係る水処理剤組成物は、シアン含有廃水のシアン除去処理に使用できる。したがって、本開示は、一態様において、シアン含有廃水の処理方法であって、シアン含有廃
水に、該廃水中のシアンとの反応当量以上の塩化第一銅となるように本開示に係る水処理剤組成物を添加し、シアンの難溶性物質を生成させ該難溶性物質を分離することを含む。
[Cyan-containing wastewater treatment method]
The water treatment agent composition according to the present disclosure can be used for cyan removal treatment of cyan-containing wastewater. Therefore, the present disclosure is, in one aspect, a method for treating cyanide-containing wastewater, wherein the cyanide-containing wastewater is treated with water according to the present disclosure so that the amount of cuprous chloride is equal to or greater than the reaction equivalent to cyanide in the wastewater. It involves adding an agent composition to produce a poorly soluble cyanide and separate the poorly soluble material.
本開示に係る処理方法おいて処理対象となるシアン含有廃水におけるシアンの含有量は、特に限定されないが、全シアン濃度で２〜１００ｍｇ／Ｌの廃水を好適に処理することができる。このようなシアン含有廃水を処理する場合には、一又は複数の実施形態において、シアンとの反応当量以上の塩化第一銅となるように本開示に係る水処理剤組成物をシアン含有廃水に添加することが挙げられ、あるいは、塩化第一銅を４〜１０００ｍｇ／Ｌ、好ましくは１０〜１００ｍｇ／Ｌとなるように、本開示に係る水処理剤組成物をシアン含有廃水に添加することが挙げられる。 The content of cyanide in the cyanide-containing wastewater to be treated in the treatment method according to the present disclosure is not particularly limited, but wastewater having a total cyanide concentration of 2 to 100 mg / L can be preferably treated. When treating such cyanide-containing wastewater, in one or more embodiments, the water treatment agent composition according to the present disclosure is added to the cyanide-containing wastewater so that the amount of cuprous chloride is equal to or greater than the reaction equivalent with cyanide. The water treatment agent composition according to the present disclosure may be added to the cyanide-containing wastewater so that the amount of cuprous chloride is 4 to 1000 mg / L, preferably 10 to 100 mg / L. Can be mentioned.
本開示に係る水処理方法は、一又複数の実施形態において、本開示に係る水処理剤組成物が導入された貯蔵タンク又はコンテナ内を、不活性ガスによって大気圧よりも微加圧状態とし、その状態で本開示に係る水処理剤組成物をシアン含有廃水に添加することを含んでいてもよい。 In the water treatment method according to the present disclosure, in one or more embodiments, the inside of the storage tank or container into which the water treatment agent composition according to the present disclosure is introduced is brought into a state of being slightly pressurized from atmospheric pressure by an inert gas. In that state, the water treatment agent composition according to the present disclosure may be added to the cyanide-containing wastewater.
本開示に係るシアン含有廃水の処理方法を、シアン廃水の処理装置の一例を示す概略模式図（図１）を用いて具体的に説明するが、この発明は本発明を限定するものではない。
処理対象となるシアン含有廃水（図中、実線矢印で示す）は、Ａ点においてシアン濃度が測定され、反応処理槽１に送られ、シアン濃度等の測定値に基づいて、処理剤組成物槽２から本開示に係る水処理剤組成物が添加される。反応処理槽１においてシアン含有廃水を撹拌しつつ、所定時間滞留させた後、生成した水難溶性塩を含むシアン含有廃水を、反応処理槽１の下方からシックナー３に送る。シックナー３では、水難溶性塩の生成反応により沈降させて、シックナー３の下方から固形分を回収する。一方、シックナー３の上方から上澄液を排出させ、Ｂ点において上澄液のシアン濃度を測定し、測定値が排水基準値あるいは上乗せ排水基準値以下であることを確認した後、上澄液を排水する。なお、上記の処理排水を再利用することは、何ら差し支えない。
The method for treating cyan-containing wastewater according to the present disclosure will be specifically described with reference to a schematic schematic diagram (FIG. 1) showing an example of a cyan wastewater treatment apparatus, but the present invention does not limit the present invention.
Cyan-containing wastewater to be treated (indicated by a solid arrow in the figure) has a cyan concentration measured at point A, is sent to the reaction treatment tank 1, and is sent to the reaction treatment tank 1 based on the measured values such as the cyan concentration in the treatment agent composition tank. From No. 2, the water treatment agent composition according to the present disclosure is added. The cyan-containing wastewater is allowed to stay for a predetermined time while being stirred in the reaction treatment tank 1, and then the cyan-containing wastewater containing the produced poorly soluble salt is sent to the thickener 3 from below the reaction treatment tank 1. In the thickener 3, the solid content is recovered from the lower part of the thickener 3 by sedimentation by the formation reaction of the poorly soluble salt in water. On the other hand, the supernatant is discharged from above the thickener 3, the cyan concentration of the supernatant is measured at point B, and after confirming that the measured value is equal to or less than the drainage standard value or the additional drainage standard value, the supernatant is discharged. Drain. It should be noted that there is no problem in reusing the above-mentioned treated wastewater.
すなわち、本開示に係るシアン含有廃水の処理方法に用いることができるシアン含有廃水の処理装置は、基本的に本開示に係る水処理剤組成物を添加するための添加剤槽、水難溶性塩を生成させるための反応槽、前記水難溶性塩を回収するための沈殿槽及びこれらを連結する配管、撹拌手段、ポンプなどからなる。前記の反応槽と沈殿槽とを兼用することもでき、このような場合にはシックナーなどの装置を用いることができる。 That is, the cyan-containing wastewater treatment apparatus that can be used in the cyan-containing wastewater treatment method according to the present disclosure basically includes an additive tank for adding the water treatment agent composition according to the present disclosure and a poorly water-soluble salt. It consists of a reaction tank for producing, a settling tank for recovering the poorly water-soluble salt, a pipe connecting them, a stirring means, a pump and the like. The reaction tank and the settling tank can also be used in combination, and in such a case, an apparatus such as a thickener can be used.
この発明を実施例により具体的に説明するが、この発明はこれらの実施例により限定されるものではない。 Although the present invention will be specifically described with reference to Examples, the present invention is not limited to these Examples.
［水処理剤組成物の調製と外観評価確認試験］
２００ミリリットル容のビーカーに水を加え、表２記載のアルカリ（土類）金属の塩化物又は臭化物、酸、また必要に応じて亜硫酸ナトリウム又はヨウ化カリウムの順に所定量となるように加えて水溶液とし、窒素バブリングを行いながらスターラーで１０分間撹拌した。その後、塩化第一銅を加えて３０分間の撹拌を行なったものを水処理剤組成物とした。得られた水処理剤組成物をガラス瓶に移し替えてから1時間保管後の外観の観察を行
なった。外観の評価は下記表１の基準とした。なお表２中の各成分の数字はすべて重量％で、残部は水である。
[Preparation of water treatment agent composition and appearance evaluation confirmation test]
Add water to a 200 ml beaker, add chloride or bromide of the alkaline (earth) metal shown in Table 2, acid, and if necessary, sodium sulfite or potassium iodide in this order to an aqueous solution. Then, the mixture was stirred with a stirrer for 10 minutes while performing nitrogen bromide. Then, cuprous chloride was added and stirred for 30 minutes to prepare a water treatment agent composition. After transferring the obtained water treatment agent composition to a glass bottle, the appearance was observed after storage for 1 hour. The appearance was evaluated based on the criteria shown in Table 1 below. The numbers of each component in Table 2 are all weight%, and the rest is water.
表２の結果から、実施例の水処理剤組成物（実施例１〜１４）においては、色みを帯びているが、沈殿や濁りもなく透明であった。これに対し、比較例の水処理剤組成物（比較例１〜１１）の水処理剤組成物においては、塩化第一銅の濃度が２重量％以下であるにもかかわらず、ポンプの詰まりや濃度不足が懸念される濁りや沈殿が生じ、塩化第一銅をほとんど溶解しないものもあり、実質的に使用できない組成物であった。 From the results in Table 2, the water treatment agent compositions of Examples (Examples 1 to 14) were tinged with color, but were transparent without precipitation or turbidity. On the other hand, in the water treatment agent composition of the water treatment agent composition of Comparative Example (Comparative Examples 1 to 11), although the concentration of cuprous chloride was 2% by weight or less, the pump was clogged. It was a composition that could not be practically used because some of them hardly dissolved cuprous chloride due to turbidity and precipitation, which may cause insufficient concentration.
［容器内における水処理剤組成物の安定化確認試験］
実施例９の水処理剤組成物を、容量２００ｍｌの密閉ポリ瓶にそれぞれ１００ｍｌずつ加え、容器の空間内に窒素ガスでパージしたものを、表３に示す温度で５０日間静置した。５０日後にガラス瓶に移して水処理剤組成物の外観の観察を行なった。その結果を表３に示す。
[Stabilization confirmation test of water treatment agent composition in container]
100 ml each of the water treatment agent composition of Example 9 was added to a closed plastic bottle having a capacity of 200 ml, and the mixture purged with nitrogen gas in the space of the container was allowed to stand at the temperature shown in Table 3 for 50 days. After 50 days, the mixture was transferred to a glass bottle and the appearance of the water treatment agent composition was observed. The results are shown in Table 3.
表３の結果から、５０日間保管後の水処理剤組成物は、いずれの保管温度においても、保管前と同様の外観が維持され、製剤として長期間安定した状態を保っていたことが確認できた。
また、窒素パージを行わなかった以外は、上記と同様に保管及び外観の観察を行った。その結果、容器を窒素パージして保管することによって、窒素パージを行わず保管した場合と比較して、より長期間安定した状態で保管できることが確認できた。
さらに、Ｎａ2ＳＯ3（成分Ｄ）を含まない水処理剤組成物で同様の確認試験を行ったところ、Ｎａ2ＳＯ3を含まない水処理剤組成物においても同様の結果が得られた。
From the results in Table 3, it can be confirmed that the water treatment agent composition after storage for 50 days maintained the same appearance as before storage at any storage temperature and maintained a stable state as a preparation for a long period of time. It was.
In addition, storage and appearance observation were carried out in the same manner as described above except that nitrogen purging was not performed. As a result, it was confirmed that by storing the container with nitrogen purge, it can be stored in a stable state for a longer period of time as compared with the case where the container is stored without nitrogen purge.
Further, when the same confirmation test was performed on the water treatment agent composition containing no Na 2 SO 3 (component D), the same result was obtained on the water treatment agent composition containing no Na 2 SO 3 .
［貯蔵タンクにおける水処理剤組成物の安定化確認試験］
実施例９の水処理剤組成物を、１０００Ｌの貯蔵タンクに７５０Ｌ加えて貯蔵タンクの空間内を窒素ガスでパージした後、さらに窒素により微加圧状態（３ｋＰａ）を保ちながら、当該水処理剤組成物を１００Ｌ／日の流量で引き抜き使用した（７日間）。
[Stabilization confirmation test of water treatment agent composition in storage tank]
After adding 750 L of the water treatment agent composition of Example 9 to a 1000 L storage tank and purging the space of the storage tank with nitrogen gas, the water treatment agent is further maintained in a slightly pressurized state (3 kPa) with nitrogen. The composition was drawn and used at a flow rate of 100 L / day (7 days).
その結果、７日間、良好な状態でタンクから引き抜き使用することができた。また、引き抜き使用終了後（引き抜き使用開始から７日後）、貯蔵タンク内の水処理剤組成物の外観を確認したところ、使用開始前と同様の褐色の透明液であった。
また、貯蔵タンクに（空気）穴を開けて微加圧状態としなかった以外は、上記と同様に使用した。その結果、微加圧状態で使用することによって、微加圧状態にしなかった場合と比較して、水処理剤組成物の安定性に優れ、かつ良好に使用できることが確認できた。
また、Ｎａ2ＳＯ3（成分Ｄ）を含まない水処理剤組成物で同様の試験を行ったところ、Ｎａ2ＳＯ3を含まない水処理剤組成物においても同様の結果が得られた。
As a result, it could be pulled out from the tank and used for 7 days in good condition. Further, when the appearance of the water treatment agent composition in the storage tank was confirmed after the end of the withdrawal use (7 days after the start of the withdrawal use), it was a brown transparent liquid similar to that before the start of use.
In addition, it was used in the same manner as above except that the storage tank was not put into a slightly pressurized state by making a (air) hole. As a result, it was confirmed that the water treatment agent composition was excellent in stability and could be used satisfactorily by using it in the slightly pressurized state as compared with the case where it was not in the slightly pressurized state.
Further, when the same test was performed on the water treatment agent composition containing no Na 2 SO 3 (component D), the same result was obtained on the water treatment agent composition not containing Na 2 SO 3 .
［シアンの除去効果の確認］
実施例２及び９の水処理剤組成物につき、下記条件でシアン除去実験を行った。
[Confirmation of cyan removal effect]
For the water treatment agent compositions of Examples 2 and 9, a cyanide removal experiment was carried out under the following conditions.
（シアン除去実験の条件）
某製鉄所の２系統のコークス炉廃水ラインより採取したシアン含有廃液Ａ（遊離シアン；１．６ｍｇ／Ｌ）およびシアン含有廃液Ｂ（遊離シアン；１．３ｍｇ／Ｌ）を用いた。１０００ｍＬ容のビーカーに、それぞれシアン含有廃液を１０００ｍＬ分注し、所定の薬剤濃度（Ｃｕ+濃度）になるように実施例２及び実施例９の水処理剤組成物を添加し、１３０ｒｐｍにて３０分間スターラーで撹拌した。その後１時間静置し、上澄み液の全シアン濃度をＪＩＳ Ｋ０１０２に準拠して測定した。測定結果を表４に示す。
(Conditions for cyan removal experiment)
Cyanide-containing wastewater A (free cyanide; 1.6 mg / L) and cyanide-containing wastewater B (free cyanide; 1.3 mg / L) collected from two coke oven wastewater lines at a certain steelworks were used. 1000 mL of each cyan-containing waste liquid is dispensed into a 1000 mL beaker, and the water treatment agent compositions of Examples 2 and 9 are added so as to have a predetermined chemical concentration (Cu + concentration), and 30 at 130 rpm. Stirrer for 1 minute. After that, the mixture was allowed to stand for 1 hour, and the total cyanide concentration of the supernatant was measured according to JIS K0102. The measurement results are shown in Table 4.
表４に示すように、製鉄所のシアン廃水に対して実施例２及び実施例９の水処理剤組成物で処理することにより、全シアン濃度を水質汚濁防止法に基づく排水基準１ｍｇ／Ｌ以下にすることができた。 As shown in Table 4, by treating the cyan wastewater of the steelworks with the water treatment agent composition of Example 2 and Example 9, the total cyan concentration is reduced to 1 mg / L or less of the wastewater standard based on the Water Pollution Control Law. I was able to.
１ 反応処理槽
２ 処理剤組成物槽
３ シックナー
1 Reaction treatment tank 2 Treatment agent composition tank 3 Sickener
Claims (6)
（Ａ）塩化第一銅、
（Ｂ）塩化ナトリウム、塩化カルシウム、塩化マグネシウム、臭化ナトリウム及び臭化マグネシウムからなる群から選ばれる少なくとも１つ、並びに、
（Ｃ）無機酸及び／又は有機酸
を含有し、
前記無機酸は、塩酸、硫酸、硝酸、リン酸及びアミド硫酸からなる群から選択され、
前記有機酸は、クエン酸であり、
前記（Ｃ）無機酸及び／又は有機酸の前記水処理剤組成物における含有量が、１０重量％以下であり、かつ、前記水処理剤組成物のｐＨが２以下である、水処理剤組成物。 A water treatment composition for cyanide-containing wastewater.
(A) Copper chloride,
(B) At least one selected from the group consisting of sodium chloride, calcium chloride, magnesium chloride, sodium bromide and magnesium bromide , and
(C) Contains inorganic and / or organic acids
The inorganic acid is selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid and amide sulfuric acid.
The organic acid is citric acid and
The water treatment agent composition in which the content of the (C) inorganic acid and / or organic acid in the water treatment agent composition is 10% by weight or less and the pH of the water treatment agent composition is 2 or less. Stuff.
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