CN109226216A - A kind of firing type heavy metal-polluted soil remover and preparation method - Google Patents
A kind of firing type heavy metal-polluted soil remover and preparation method Download PDFInfo
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- CN109226216A CN109226216A CN201811086186.1A CN201811086186A CN109226216A CN 109226216 A CN109226216 A CN 109226216A CN 201811086186 A CN201811086186 A CN 201811086186A CN 109226216 A CN109226216 A CN 109226216A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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Abstract
本发明涉及一种烧制型土壤重金属去除剂及制备方法；土壤重金属去除剂的组份及的质量百分比为：天然沸石粉40‑90％、发泡剂0‑40％、凹凸棒土10‑20％。将天然沸石粉、发泡剂和凹凸棒土按质量百分比充分混合后的粉末，加入去离子水，捏合挤压成颗粒，静置、干燥；将得到的颗粒进行高温烧制，得到普通烧制型重金属去除剂；将得到的普通烧制型重金属去除剂放在酸溶液中超声、洗涤、干燥，得到酸化烧制型重金属去除剂。本发明提供的土壤重金属去除剂具有很高的机械强度，不宜破损，能够回收后再生重复利用，不仅降低了经济成本，还能避免破损在土壤中；去除剂在土壤中自身性质稳定，不会造成二次污染；应用操作过程中无需使用大型设备。The invention relates to a firing type soil heavy metal remover and a preparation method; the components and mass percentages of the soil heavy metal remover are: 40-90% of natural zeolite powder, 0-40% of foaming agent, and 10-10% of attapulgite 20%. The powder after the natural zeolite powder, foaming agent and attapulgite are fully mixed by mass percentage, add deionized water, knead and extrude into granules, stand and dry; the obtained granules are fired at high temperature to obtain ordinary firing The obtained ordinary fired heavy metal remover is placed in an acid solution to ultrasonically, washed and dried to obtain an acidified fired heavy metal remover. The soil heavy metal remover provided by the invention has high mechanical strength, is not suitable for damage, can be recycled and reused, not only reduces the economic cost, but also avoids damage in the soil; Cause secondary pollution; no need to use large equipment during application operation.
Description
Technical field
Administered the present invention relates to contaminated soil and recovery technique field, propose a kind of firing type heavy metal-polluted soil remover and
Preparation method；The firing type heavy metal-polluted soil remover fired more particularly to a kind of recyclable high intensity by high temperature
And preparation method thereof.
Background technique
Due to atmospheric sedimentation, below standard sewage agriculture filling and the unreasonable application of agricultural substance, heavy metal is caused to enter farmland,
It not only will affect the normal growth of crops, human body, insulting health can be also entered by food chain.From " the whole nation
Investigation of Soil Pollution bulletin " (2014) it can be seen that China's soil pollution is on the rise, heavy metal pollution state allows of no optimist, this
The great attention of national all circles is caused, control is extremely urgent.
The technology of existing heavy-metal contaminated soil mainly includes peripheral doses, biological prosthetic, Agro-ecology reparation and chemistry
Recovery technique.Peripheral doses engineering amount is big, costly, and the scope of application is small, it is also possible to generate other risks, when use has
Certain limitation.Since the biological effectiveness of heavy metal can change with the change of environmental condition, plant stability
Technology also will receive certain restrictions, and pollutant can be then transferred in atmosphere by phytovolatilization, may be to the mankind and other biological
Certain risk is generated, and the hyperaccumulative plant overwhelming majority being currently known belongs to the plant that growth is slow, biomass is small, and mostly
Number is that lotus throne is grown, mechanical difficulties, thus plant accumulation is also less suitable for the reparation of contaminated soil.For microorganism remediation
Also there is certain defect with animal reparation technology, is still confined to experimental study level mostly, rarely has the report of example.Agricultural is raw
State recovery technique relative maturity and cost is relatively low, it is smaller to disturb to soil environment, but its repairing efficiency is long, and effect is also simultaneously
It is not significant.In chemical repair method, electro reclamation can remove removing heavy metals and organic pollutant and not stir soil layer, operation letter
Single, treatment effeciency height, but easily lead to soil physico-chemical property variation；When being repaired using chemical leaching, efficient eluent is expensive,
Elution waste liquid may cause the secondary pollution of soil and groundwater；Chemical fixation is simple and easy, but is not that one kind is permanent and repairs
Multiple measure, it only changes the existing forms of heavy metal in the soil, easily-activated generation secondary pollution, and needs constantly addition solid
Agent stablizing effect, this will destroy the property of soil itself, influence the normal production of plant.
Chemiadsorption is a kind of method for effectively removing heavy metal, and existing adsorbent is all powdered mostly, though
So have relatively good adsorption effect, but since own vol is smaller, be easy be bonded together with soil particle, be not only easy to by
Duct is blocked, adsorption effect is influenced, and is difficult to be separated with conventional method, so that repairing effect be caused to be not achieved.This
The heavy metal-polluted soil remover that invention provides is graininess, has good mechanical strength, and mechanical means can be used by it from soil
It is separated in earth and lossless to remover, in addition, there is good adsorption effect to heavy metal, is influenced phase by soil environment
To less.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of firing type heavy metal-polluted soil remover and its preparation side
Method.The heavy metals removal agent is formed by firing, and is had suitably sized and very high mechanical strength, is not influenced plant and normally give birth to
Recycling is produced and is convenient for, while it can make the heavy metal concentration in the soil liquid substantially by the pH of suction-operated and adjusting part
Degree decline, to reduce absorption of the plant to heavy metal.
The present invention adopts the following technical scheme:
A kind of firing type heavy metal-polluted soil remover, it is characterized in that component and mass percent are as follows:
Natural zeolite powder 40-90%
Foaming agent 0-40%
Attapulgite 10-20%.
The foaming agent is selected from one of cornstarch, calcium carbonate, urea, ammonium carbonate or ammonium hydrogen carbonate or any group
It closes.
The preparation method of firing type heavy metals removal agent of the invention；It is characterized in that including the following steps:
1) powder after, being sufficiently mixed natural zeolite powder, foaming agent and attapulgite by mass percentage, addition go from
Sub- water, kneading are squeezed into particle, stand, is dry；
2), the particle for obtaining step 1) carries out high temperature firing, obtains common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2) is placed on ultrasound in acid solution, washing, drying, obtains
To acidification firing type heavy metals removal agent.
In the step 1), static conditions are to be stored at room temperature 3-12h, and drying temperature is 140-160 DEG C, drying time 3-
6h。
In the step 1), mixed solid powder quality: deionized water quality=5:2.
In the step 2), firing condition is temperature programming, rises to 200 DEG C from room temperature with the rate of 2 DEG C/min, keeps 1-
2h, then 700-950 DEG C is risen to the rate of 5 DEG C/min, keep 10-180min；Firing tool is nitrogen atmosphere tube furnace or horse
Not furnace.
In the step 3), acid solution is that the acid of the percent by volume that is formed greater than 20% is diluted by commercially available concentrated hydrochloric acid is molten
Liquid, ultrasonic time 10-180min.
In general, compared with prior art, the present invention can achieve the following beneficial effects:
(1) heavy metal-polluted soil remover provided by the invention has very high mechanical strength, after impregnating 30d in aqueous solution
It is unsuitable damaged there is still a need for using iron hammer that can be crushed, therefore in use process, recycling is regenerated after capable of recycling, and is not only reduced
Economic cost, moreover it is possible to avoid it is damaged in the soil, influence soil property；
(2) soil huge sum of money remover constituent is preferably natural zeolite powder in the present invention, and attapulgite powder and corn form sediment
Powder etc., it is cheap, it is at low cost；
(3) heavy metal-polluted soil remover provided by the invention can be removed using the collective effect of foaming agent and natural zeolite
Heavy metal in soil, removal efficiency may be up to 88.47%, and remover is designed and sized to 1cm or so, and size is suitable, is convenient for
Recycling；
(4) heavy metals removal agent proposed by the present invention can not only remove the heavy metal in soil, can be applied in down
The improvement of water channel sludge, river, bottom mud in lake, the improvement of heavy metals removal and drinking water quality in waste water；
(5) remover provided by the invention is in alkalescent, can effectively be neutralized into the H in soil+, prevent soil potential
Acidification.Local soil pH value variation simultaneously can also reduce rapidly the concentration of heavy metal；
(6) remover provided by the invention in the soil stablize by self property, will not discharge harmful substance, will not cause
Secondary pollution, and its harm can be reduced by reclaiming；
(7) remover preparation provided by the invention is simple, without using large scale equipment during actual operation；
(8) remover provided by the invention is also used as catalyst carrier, has good duct and intensity.
Specific embodiment
Technical solution of the present invention is described in further detail combined with specific embodiments below, described specific embodiment
Only the present invention is explained, is not intended to limit the invention.
Embodiment 1
Present embodiments provide a kind of firing type heavy metal-polluted soil remover, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 40%,
Foaming agent be cornstarch 40%,
Attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 160 DEG C of dry 3h；
2) particle that step 1) obtains, is risen to 200 from room temperature with the rate of 2 DEG C/min in nitrogen atmosphere tube furnace
DEG C, 2h is kept, then rise to 900 DEG C with the rate of 5 DEG C/min, keeps 30min, obtain common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 2
Firing type heavy metals removal agent component is same as Example 1 in the present embodiment.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 160 DEG C of dry 3h；
2) particle that step 1) obtains, is risen to 200 from room temperature with the rate of 2 DEG C/min in nitrogen atmosphere tube furnace
DEG C, 2h is kept, then rise to 900 DEG C with the rate of 5 DEG C/min, keeps 30min, obtain common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the nitric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 3
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 50%,
Foaming agent be cornstarch 22% and calcium carbonate 8%,
Attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 160 DEG C of dry 3h；
2) particle that step 1) obtains, is risen to 200 from room temperature with the rate of 2 DEG C/min in nitrogen atmosphere tube furnace
DEG C, 2h is kept, then rise to 950 DEG C with the rate of 5 DEG C/min, keeps 30min, obtain common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 4
Heavy metals removal agent component is same as Example 1 in the present embodiment.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 160 DEG C of dry 3h；
2) particle that step 1) obtains, is risen to 200 from room temperature with the rate of 2 DEG C/min in nitrogen atmosphere tube furnace
DEG C, 2h is kept, then rise to 950 DEG C with the rate of 5 DEG C/min, keeps 30min, obtain common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 5
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 45%,
Foaming agent be cornstarch 35%,
Attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 160 DEG C of dry 3h；
2) particle that step 1) obtains, is risen to 200 from room temperature with the rate of 2 DEG C/min in nitrogen atmosphere tube furnace
DEG C, 2h is kept, then rise to 900 DEG C with the rate of 5 DEG C/min, keeps 30min, obtain common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 30%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 6
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 65%,
Foaming agent be cornstarch 15%,
Attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 3h, 140 DEG C of dry 6h；
2) particle that step 1) obtains, is risen to 200 DEG C from room temperature with the rate of 2 DEG C/min in Muffle furnace, is kept
1.5h, then 900 DEG C are risen to the rate of 5 DEG C/min, 10min is kept, common firing type heavy metals removal agent is obtained；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 7
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 65%,
Foaming agent be cornstarch 10% and urea 5%,
Attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite, foaming agent and attapulgite uniformly by above-mentioned mass percent, after mixing
Solid powder quality: deionized water is added in deionized water quality=5:2 ratio, and kneading is squeezed into diameter and height is 1cm
Cylindrical body particle, stand 4h, 140 DEG C of dry 5h；
2) particle that step 1) obtains, is risen to 200 DEG C from room temperature with the rate of 2 DEG C/min in Muffle furnace, is kept
1.5h, then 900 DEG C are risen to the rate of 5 DEG C/min, 10min is kept, common firing type heavy metals removal agent is obtained；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 10min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 8
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 90%,
Attapulgite 10%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite and attapulgite uniformly by above-mentioned mass percent, by mixed solid
Powder quality: deionized water is added in deionized water quality=5:2 ratio, mediates the cylinder for being squeezed into that diameter and height are 1cm
Body particle stands 12h, 150 DEG C of dry 6h；
2) particle that step 1) obtains, is risen to 200 DEG C from room temperature with the rate of 2 DEG C/min in Muffle furnace, keeps 1h,
700 DEG C are risen to the rate of 5 DEG C/min again, 180min is kept, obtains common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 180min in the hydrochloric acid solution that percentage is 20%, is washed with deionized to neutrality, 120 DEG C of dry 3h are acidified
Firing type heavy metals removal agent.
Embodiment 9
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 65%,
Foaming agent be carbonic acid ammonia 20%,
Attapulgite 15%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite and attapulgite uniformly by above-mentioned mass percent, by mixed solid
Powder quality: deionized water is added in deionized water quality=5:2 ratio, mediates the cylinder for being squeezed into that diameter and height are 1cm
Body particle stands 12h, 150 DEG C of dry 6h；
2) particle that step 1) obtains, is risen to 200 DEG C from room temperature with the rate of 2 DEG C/min in Muffle furnace, keeps 1h,
700 DEG C are risen to the rate of 5 DEG C/min again, 180min is kept, obtains common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2), which is placed on, dilutes the volume formed by commercially available concentrated hydrochloric acid
Ultrasound 60min in the hydrochloric acid solution that percentage is 60%, is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification and burns
Type heavy metals removal agent processed.
Embodiment 10
A kind of firing type heavy metal-polluted soil remover is provided in the present embodiment, it is characterized in that component and mass percent
Are as follows:
Natural zeolite powder 75%,
Foaming agent be ammonium hydrogencarbonate 5%,
Binder agent is attapulgite 20%.
Preparation method are as follows:
1) after, being sufficiently mixed natural zeolite and attapulgite uniformly by above-mentioned mass percent, by mixed solid
Powder quality: deionized water is added in deionized water quality=5:2 ratio, mediates the cylinder for being squeezed into that diameter and height are 1cm
Body particle stands 12h, 150 DEG C of dry 6h；
2) particle that step 1) obtains, is risen to 200 DEG C from room temperature with the rate of 2 DEG C/min in Muffle furnace, keeps 1h,
800 DEG C are risen to the rate of 5 DEG C/min again, 120min is kept, obtains common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2) is placed on by ultrasonic in commercially available concentrated hydrochloric acid solution
60min is washed with deionized to neutrality, 120 DEG C of dry 3h, obtains acidification firing type heavy metals removal agent.
Performance test
Performance test, cadmium in test are removed to firing type heavy metal-polluted soil remover of the Examples 1 to 10 to preparation
Initial concentration be 10mg/L, measurement remover the results are shown in Table 1 to the maximum material removal rate of Cd and self-characteristic.
The removal effect and self-characteristic of firing type soil huge sum of money remover prepared by table 1 to Cd
Note: since specific preparation method and component are different, remover mechanical strength be will be different, but be met practical strong
Degree requires
Conclusion: the present invention has good removal effect, and good mechanical performance to Cd.The present invention can by absorption and
Basicity variation reduces the content of heavy metal in soil, reduces the activity of heavy metal, and the absorption of plant pair heavy metal will be reduced,
There are also reclaimings simultaneously, do not influence the normal growth of plant, the influence to soil property is smaller, and therefore, the present invention can effectively be gone
Except the content of beary metal in soil.
Although invention has been described for application example above, the invention is not limited to above-mentioned specific implementations
Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to of the invention
Within protection.
Claims (8)
1. a kind of firing type heavy metal-polluted soil remover, it is characterized in that component and mass percent are as follows:
Natural zeolite powder 40-90%
Foaming agent 0-40%
Attapulgite 10-20%.
2. heavy metal-polluted soil remover as described in claim 1, it is characterized in that the foaming agent is selected from cornstarch, carbonic acid
One of calcium, urea, ammonium carbonate or ammonium hydrogen carbonate or any combination.
3. the preparation method of the firing type heavy metals removal agent of claim 1；It is characterized in that including the following steps:
1) deionization is added in the powder after, being sufficiently mixed natural zeolite powder, foaming agent and attapulgite by mass percentage
Water, kneading are squeezed into particle, stand, is dry；
2), the particle for obtaining step 1) carries out high temperature firing, obtains common firing type heavy metals removal agent；
3), the common firing type heavy metals removal agent for obtaining step 2) is placed on ultrasound in acid solution, washing, drying, obtains acid
Change the heavy metals removal agent of firing type.
4. method as claimed in claim 3, it is characterized in that static conditions are to be stored at room temperature 3-12h, drying temperature in step 1)
It is 140-160 DEG C, drying time 3-6h.
5. method as claimed in claim 3, it is characterized in that in step 1), powder quality: deionized water quality=5:2.
6. method as claimed in claim 3, it is characterized in that firing condition is temperature programming in step 2), from room temperature with 2 DEG C/
The rate of min rises to 200 DEG C, keeps 1-2h, then rise to 700-950 DEG C with the rate of 5 DEG C/min, keeps 10-180min；It fires
Tool is nitrogen atmosphere tube furnace or Muffle furnace.
7. method as claimed in claim 3, it is characterized in that acid solution is to dilute the body formed by commercially available concentrated hydrochloric acid in step 3)
Product percentage is greater than 20% acid solution.
8. method as claimed in claim 3, it is characterized in that in step 3), ultrasonic time 10-180min.
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| CN109663583A (en) * | 2019-01-25 | 2019-04-23 | 兰州大学 | A kind of material and preparation method thereof of adsorbing separation heavy metal ions in soil |
| CN110420618A (en) * | 2019-07-24 | 2019-11-08 | 生态环境部南京环境科学研究所 | A kind of preparation method of novel attapulgite soil and its method for handling heavy metal wastewater thereby |
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