CN109292896A - A method for controlling humic acid in drinking water - Google Patents
A method for controlling humic acid in drinking water Download PDFInfo
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- CN109292896A CN109292896A CN201811154580.4A CN201811154580A CN109292896A CN 109292896 A CN109292896 A CN 109292896A CN 201811154580 A CN201811154580 A CN 201811154580A CN 109292896 A CN109292896 A CN 109292896A
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- humic acid
- drinking water
- controlling
- water
- ultraviolet
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- 239000004021 humic acid Substances 0.000 title claims abstract description 47
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003651 drinking water Substances 0.000 title claims abstract description 26
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 26
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- -1 hypochlorite ions Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 37
- 230000015556 catabolic process Effects 0.000 abstract description 22
- 238000006731 degradation reaction Methods 0.000 abstract description 22
- 239000006227 byproduct Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000000249 desinfective effect Effects 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 22
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 11
- 229910052753 mercury Inorganic materials 0.000 description 11
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 125000001309 chloro group Chemical group Cl* 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 239000005708 Sodium hypochlorite Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000009303 advanced oxidation process reaction Methods 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000008239 natural water Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000011012 sanitization Methods 0.000 description 1
- 210000000697 sensory organ Anatomy 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physical Water Treatments (AREA)
Abstract
The present invention relates to a kind of methods of humic acid in control drinking water, comprising the following steps: (1) adjusts the pH of drinking water to be processed to alkalescent, hypochlorite ion is then added, stirs evenly, obtains treatment fluid；(2) treatment fluid is placed under the irradiation of UV-LED lamp, until disinfection is completed.Compared with prior art, the present invention is without complicated interminable operating process, the content of humic acid can be quickly reduced under the conditions of practical water body pH, and degradation ratio is more thoroughly, salinity is higher, the generation of disinfection by-products in subsequent disinfecting process can be effectively cut down, so the present invention is a kind of safe and more efficient processing method for humic acid in drinking water.
Description
Technical field
The present invention relates to Drinking Water Sanitization Technology fields, and in particular to a method of humic acid in control drinking water.
Background technique
Humic acid natural is present in natural water, itself does not constitute a threat to human health.But humic acid
In the presence of will increase organic carbon level in natural water, to influence the operation of drinking water treatment technique, as because of sense organ caused by it
Problem (smell and color).In addition, humic acid is considered as generating poisonous and harmful disinfection by-products in Disinfection Procedure of drinking Water
A kind of important as precursors object.Therefore, it is necessary to explore a kind of efficient treatment process effectively removed in water treatment procedure humic acid from
And cut down the generation of disinfection by-products in disinfecting process.
Currently, existing multiple water treatment technique is used for the removal of humic acid, such as enhanced coagulation, absorption and UF membrane.But
These method removal abilities are low, and will increase cost of water treatment.It has been reported that the advanced oxygen being made of ultraviolet irradiation and free chlorine
Change technology can effectively degrade various organic pollutants.But, this kind of ultraviolet/chlorine high-level oxidation technology its efficiency is by ultraviolet radioactive wave
Long and water body pH condition is affected.Instantly uv radiation source used in water factory is mainly traditional low pressure mercury lamp, hair
The a length of 253.7nm of ejected wave.The high-level oxidation technology being made of this conventional low ultraviolet mercury lamp and free chlorine, is more suitable for acidity
Under the conditions of water body；I.e. its treatment efficiency reaches maximum in acid condition, and reduces as water body pH increases.However, real
The pH value of border water body is generally 7.0~8.5 or so, so use this low pressure mercury lamp based on 254nm wavelength as light source,
The treatment effeciency of the technique cannot be made to reach maximization.On the one hand, this removal for being unfavorable for humic acid in water body；On the other hand,
This also will increase the cost of water process.It is therefore desirable to a kind of novel ultraviolet source, so that this technique is more applicable for reality
Water body pH condition, and someone is not related to this method by selection light source raising humic acid removal rate.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide in a kind of control drinking water
The method of humic acid.
The purpose of the present invention can be achieved through the following technical solutions: a method of humic acid in control drinking water,
The following steps are included:
(1) pH of drinking water to be processed is adjusted to alkalescent, and hypochlorite ion is then added, stirs evenly, is handled
Liquid；
(2) treatment fluid is placed under the irradiation of UV-LED lamp, until disinfection is completed.
Water sample pH is adjusted to alkalescent in the present invention, being mainly based upon raw water in the actual production process is in alkalescent,
So way is also for closer practical operation condition herein.If drinking water is in acid or alkalinity, on the one hand to human health
It is unfavorable, on the other hand, aqueduct can be corroded.Hypochlorite ion in sodium hypochlorite can kill micro- life of causing a disease in drinking water
Object reduces content of humic acid, ensures drinking water safety.UV-LED lamp has lot of advantages compared with Conventional UV mercury lamp, such as small in size,
The mercury substance of non-hazardous environment does not need preheating etc., this can save its land occupation in water process, be optimized by wavelength selection
Water treatment efficiency, while the harm of mercury leakage is avoided, it can also be with save the cost without preheating；More importantly wavelength selects
Select that range is wide, so that hypochlorite ion can reach better treatment effect under the ultraviolet light of optimal wavelength.
Preferably, the drinking water to be processed passes through H2SO4Or NaOH adjusts pH to 7~9.
Preferably, the hypochlorite ion is added by the way that NaClO is added.
Preferably, the concentration of hypochlorite ion is >=1mg/L in the treatment fluid.
Preferably, a length of 260~290nm of ultraviolet light wave of the UV-LED lamp.When wavelength be less than 260nm, then handle
Effect and traditional mercury lamp are close；When greater than 290nm, treatment effect is weaker than traditional mercury lamp.The reason of causing this phenomenon be mainly
The molar absorption coefficient of free chlorine reaches high value in 260~290nm wave band, and is less than 260nm or it rubs when greater than 290nm
You are respectively less than the wave band at absorptivity.
The dose of radiation of the preferred ultraviolet light is 100~1200mJ/cm2.Select above-mentioned dose of radiation, be because
When the too small inactivation that not can guarantee to pathogenic microorganisms of dose of radiation, too it will cause energy wastes greatly, and will not generate more excellent
Treatment effect.
Compared with prior art, the beneficial effects of the present invention are embodied in following several respects:
1) content of humic acid in drinking water is controlled, under the conditions of practical water body pH (7.0~8.5), compares conventional low mercury
Lamp, this kind of long wavelength UV-LED light source (260~290nm) can quickly reduce the content of humic acid, degrade more thorough, and salinity
It is higher, it can more effectively reduce the risk that disinfection by-products is generated in subsequent disinfecting process.
2) operation of the present invention is simple, easy control of reaction conditions, and used chemical reagent and material are that water process is used
Conventional products, are not introduced into other poisonous and harmful substances, and safety is especially prominent.
3) reaction does not need to carry out under closed oxygen-free environment in the present invention, can pass through purple under open room temperature environment yet
The effect of outside/chlorine group technology, effectively reduces the content of humic acid.
4) ultraviolet/chlorine group technology is easy to operate in the present invention, very fast to humic acid degradation, and salinity is higher, is one
The effective drinking water treatment method of kind.
Detailed description of the invention
Fig. 1 is different pH to control content of humic acid (UV in ultraviolet/chlorine group technology254) degradation rate effect picture；
Fig. 2 is different pH to the degradation rate effect picture for controlling content of humic acid (DOC) in ultraviolet/chlorine group technology；
Fig. 3 is light sources with different wavelengths to the effect picture for controlling content of humic acid (fluorescence intensity) in ultraviolet/chlorine group technology.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
It is 7.0~9.0 by Huangpu River Water pH control, temperature is 25 DEG C, and sodium hypochlorite is added into solution, is then placed
Ultraviolet irradiation test is carried out in the light source UV-LED light source of a length of 275nm of ultraviolet light wave, uv dosage reaches 100~1200mJ/
cm2Reaction solution is sampled afterwards and membrane filtration.It is calculated by material concentration in water, raw water DOC is 3mg/L, sodium hypochlorite dosage
For 14.2mg/L, aromatic substance (UV in humic acid254) degradation rate effect picture as shown in Figure 1, there is dissolubility in humic acid
The degradation rate effect picture of machine carbon (DOC) is as shown in Figure 2.
Comparative example 1
Using raw water and experiment condition same as Example 1, the difference is that using ultraviolet light from ultraviolet mercury
Lamp, wavelength 254nm, aromatic substance (UV in humic acid254) degradation rate effect picture as shown in Figure 1, molten in humic acid
The degradation rate effect picture for solving property organic carbon (DOC) is as shown in Figure 2.
Comparative example 2
Using raw water and experiment condition same as Example 1, the difference is that use the wavelength of ultraviolet light for
310nm, aromatic substance (UV in humic acid254) degradation rate effect picture as shown in Figure 1, dissolved organic carbon in humic acid
(DOC) degradation rate effect picture is as shown in Figure 2.
As can be seen from Figure 1 under condition of different pH, content of humic acid (UV254) degradation efficiency it is widely different.As raw water pH
When between 7.0~9.0, the UV-LED for choosing 275nm has highest UV as ultraviolet/chlorine advanced oxidation processes of light source254
Degradation rate.It follows that different wave length will affect ultraviolet/chlorine group technology to content of humic acid (UV254) degradation effect,
Under practical water condition, 275nm is chosen as ultraviolet source, can more efficiently degrade content of humic acid (UV254)。
As can be seen from Figure 2 under condition of different pH, the degradation efficiency of content of humic acid (DOC) is widely different.As raw water pH
When between 7.0~9.0, the UV-LED for choosing 275nm has highest DOC as ultraviolet/chlorine advanced oxidation processes of light source
Degradation rate.It follows that different wave length will affect ultraviolet/chlorine group technology to the degradation effect of content of humic acid (DOC),
Under practical water condition, 275nm is chosen as ultraviolet source, can more efficiently degrade content of humic acid (DOC).
Embodiment 2
It is 8.0 by Huangpu River Water pH control, temperature is 25 DEG C, and sodium hypochlorite is added into solution, is then placed into purple
(275nm) carries out ultraviolet irradiation test under outer light source, and uv dosage reaches 1200mJ/cm2Reaction solution is sampled afterwards and film
Filter.It is calculated by material concentration in water, raw water DOC is 3mg/L, and sodium hypochlorite dosage is 14.2mg/L, content of humic acid (fluorescence
Intensity) degradation effect figure it is as shown in Figure 3.
Comparative example 3
Using raw water and experiment condition same as Example 2, the difference is that using ultraviolet light from ultraviolet mercury
The degradation effect figure of lamp, wavelength 254nm, content of humic acid (fluorescence intensity) is as shown in Figure 3.
Comparative example 4
Using raw water and experiment condition same as Example 2, the difference is that use the wavelength of ultraviolet light for
The degradation effect figure of 310nm, content of humic acid (fluorescence intensity) are as shown in Figure 3.
As can be seen from Figure 3 under the conditions of pH=8.0, uv dosage reaches 1200mJ/cm2When, choose the UV- of 275nm
LED is minimum as the reaction solution fluorescence intensity under the conditions of ultraviolet/chlorine advanced oxidation processes of light source, i.e., 275nm UV-LED is in institute
It studies and reaches maximum fluorescence intensity degradation effect in different light sources.It follows that (pH is 8.0 left under practical water condition
It is right), 275nm is chosen as ultraviolet source, and can more efficiently degrade content of humic acid (fluorescence intensity).
Embodiment 3
Using raw water and experiment condition same as Example 1, the difference is that the ultraviolet light wave used is a length of
260nm, through detecting, the content degradation effect of humic acid is better than comparative example 1 in raw water.
Embodiment 4
Using raw water and experiment condition same as Example 1, the difference is that the ultraviolet light wave used is a length of
290nm, through detecting, the content degradation effect of humic acid is better than comparative example 1 in raw water.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154580.4A CN109292896A (en) | 2018-09-30 | 2018-09-30 | A method for controlling humic acid in drinking water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154580.4A CN109292896A (en) | 2018-09-30 | 2018-09-30 | A method for controlling humic acid in drinking water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109292896A true CN109292896A (en) | 2019-02-01 |
Family
ID=65161234
Family Applications (1)
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|---|---|---|---|
| CN201811154580.4A Pending CN109292896A (en) | 2018-09-30 | 2018-09-30 | A method for controlling humic acid in drinking water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316198B2 (en) * | 1983-09-29 | 1991-03-04 | Hitachi Plant Eng & Constr Co | |
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