CN116536056B - Soil pollution repairing agent - Google Patents
Soil pollution repairing agent Download PDFInfo
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- CN116536056B CN116536056B CN202310789582.5A CN202310789582A CN116536056B CN 116536056 B CN116536056 B CN 116536056B CN 202310789582 A CN202310789582 A CN 202310789582A CN 116536056 B CN116536056 B CN 116536056B
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- molecular sieve
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- soil
- attapulgite
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 42
- 238000003900 soil pollution Methods 0.000 title claims abstract description 31
- 239000002808 molecular sieve Substances 0.000 claims abstract description 74
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229960000892 attapulgite Drugs 0.000 claims abstract description 39
- 229910052625 palygorskite Inorganic materials 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 38
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 19
- 238000005067 remediation Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims abstract description 10
- 239000004113 Sepiolite Substances 0.000 claims abstract description 8
- 239000000440 bentonite Substances 0.000 claims abstract description 8
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 8
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 8
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 8
- 239000010455 vermiculite Substances 0.000 claims abstract description 8
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 8
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- AXQHLISAKXCRHW-UHFFFAOYSA-N P(=O)(O)(O)O.NC1=CC=C(C=C1)[Na] Chemical compound P(=O)(O)(O)O.NC1=CC=C(C=C1)[Na] AXQHLISAKXCRHW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 5
- -1 sodium octyloxy hydroxylamine Chemical compound 0.000 claims description 16
- 239000011259 mixed solution Substances 0.000 claims description 15
- HWCKGOZZJDHMNC-UHFFFAOYSA-M tetraethylammonium bromide Chemical compound [Br-].CC[N+](CC)(CC)CC HWCKGOZZJDHMNC-UHFFFAOYSA-M 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 19
- 239000002245 particle Substances 0.000 description 19
- 239000000203 mixture Substances 0.000 description 14
- 238000002360 preparation method Methods 0.000 description 8
- 229910052793 cadmium Inorganic materials 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 7
- 239000011651 chromium Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229920005552 sodium lignosulfonate Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- LDVDEPDIOSXHLX-UHFFFAOYSA-L disilver;(4-aminophenyl) phosphate Chemical compound [Ag+].[Ag+].NC1=CC=C(OP([O-])([O-])=O)C=C1 LDVDEPDIOSXHLX-UHFFFAOYSA-L 0.000 description 1
- LQHGVLDZRKLMCR-UHFFFAOYSA-L disodium;(4-aminophenyl) phosphate Chemical compound [Na+].[Na+].NC1=CC=C(OP([O-])([O-])=O)C=C1 LQHGVLDZRKLMCR-UHFFFAOYSA-L 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to the technical field of soil remediation, and provides a soil pollution remediation agent, which comprises the following raw materials in parts by weight: 10-20 parts of modified attapulgite, 10-16 parts of molecular sieve, 4-6 parts of sepiolite, 4-6 parts of vermiculite, 4-6 parts of bentonite, 2-4 parts of iron powder, 2-4 parts of sodium lignin sulfonate, 1-2 parts of 4-aminophenyl sodium phosphate and 70-80 parts of water. Through the technical scheme, the problem that the soil pollution repairing agent in the prior art is poor in heavy metal treatment effect is solved.
Description
Technical Field
The invention relates to the technical field of soil pollution remediation, in particular to a soil pollution remediation agent.
Background
Heavy metals can not be automatically decomposed into harmless substances in soil, are long-term and potential pollutants in the soil, and can be biologically enriched through a food chain to generate biological amplification effect. The heavy metal pollution in the soil can influence the development of plant roots and leaves on one hand, and on the other hand, the heavy metal is absorbed by the plant body in the soil, and finally, the heavy metal is enriched in the human body, so that the nervous system, the immune system, the skeletal system and the like of the human body are damaged.
At present, chemical modifier, biological improvement measures, organic fertilizer application and the like are mainly adopted for soil pollution remediation, and although the soil pollution is improved to a certain extent, the improvement effect is not ideal.
Disclosure of Invention
The invention provides a soil pollution repairing agent, which solves the problem that the soil pollution repairing agent in the related art has poor heavy metal treatment effect.
The technical scheme of the invention is as follows:
the soil pollution repairing agent comprises the following raw materials in parts by weight: 10-20 parts of modified attapulgite, 10-16 parts of molecular sieve, 4-6 parts of sepiolite, 4-6 parts of vermiculite, 4-6 parts of bentonite, 2-4 parts of iron powder, 2-4 parts of sodium lignin sulfonate, 1-2 parts of 4-aminophenyl sodium phosphate and 70-80 parts of water.
As a further technical scheme, the molecular sieve consists of a first molecular sieve and/or a second molecular sieve; the first molecular sieve is one of a ZSM-5 molecular sieve and a TS-1 molecular sieve, and the second molecular sieve is one of a 10X molecular sieve, a 13X molecular sieve, a 5A molecular sieve and a 4A molecular sieve.
As a further technical scheme, the molecular sieve consists of a first molecular sieve and a second molecular sieve; the first molecular sieve is a TS-1 molecular sieve, and the second molecular sieve is a 4A molecular sieve.
As a further technical scheme, the mass ratio of the first molecular sieve to the second molecular sieve is 3:0.5-1.5.
As a further technical scheme, the modified attapulgite is prepared by treating attapulgite with a mixed solution; the mixed solution is obtained by mixing tetraethylammonium bromide, sodium octyloxy hydroxylamine and water.
As a further technical scheme, before adding the mixed solution, the attapulgite is dried in a 110 ℃ oven for 2 hours.
As a further technical scheme, the mass sum of the tetraethylammonium bromide and the sodium octyloxy hydroxylammonium hydroxide is 4-6wt% of the mixed solution.
As a further technical scheme, the mass ratio of the tetraethylammonium bromide to the sodium octyloxy hydroxylamino acid is 3:1-3.
As a further technical scheme, the treatment temperature is 80-90 ℃ and the treatment time is 1.5-2.5h.
As a further technical scheme, the mass ratio of the attapulgite to the mixed solution is 1:5.
As a further technical scheme, the particle size of the attapulgite is 50-80nm.
As a further technical scheme, the particle size of the sepiolite is 100-200nm.
As a further technical scheme, the grain diameter of the vermiculite is 50-100nm.
As a further technical scheme, the particle size of the bentonite is 100-200nm.
The invention also discloses a preparation method of the soil pollution restoration agent, which comprises the following steps: and mixing the raw materials to obtain the soil pollution repairing agent.
The application of the soil pollution remediation agent in the treatment of heavy metal polluted soil.
As a further technical scheme, the heavy metals comprise cadmium, lead and chromium.
The working principle and the beneficial effects of the invention are as follows:
1. according to the soil remediation agent prepared by combining the substances such as the molecular sieve, the modified attapulgite, the sodium lignin sulfonate and the 4-amino benzene sodium phosphate, the soil remediation agent can be uniformly dispersed in soil, heavy metal ions in the soil can be effectively captured, and the treatment effect of the soil remediation agent on heavy metals in the soil is improved.
2. The molecular sieve in the invention adopts a mode of compounding the TS-1 molecular sieve and the 4A molecular sieve, so that the treatment effect of the soil remediation agent on heavy metals in soil is further improved.
3. According to the invention, the attapulgite is modified by using tetraethyl ammonium bromide and sodium octyloxy hydroxylamine, so that the adsorption effect of the attapulgite on heavy metals in soil is increased, and the treatment effect of the soil remediation agent on the heavy metals in soil is improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method of the soil pollution repairing agent comprises the following steps:
uniformly mixing 10 parts of modified attapulgite, 6.7 parts of TS-1 molecular sieve, 3.3 parts of 4A molecular sieve, 4 parts of sepiolite (with the particle size of 100-120 nm), 4 parts of vermiculite (with the particle size of 50-70 nm), 4 parts of bentonite (with the particle size of 100-140 nm), 2 parts of iron powder, 2 parts of sodium lignosulfonate, 1 part of 4-aminobenzene sodium phosphate and 70 parts of water in a stirrer to obtain a soil pollution repairing agent;
the preparation method of the modified attapulgite comprises the following steps:
s1, drying attapulgite (with the particle size of 50-60 nm) in a 110 ℃ oven for 2 hours to obtain dried attapulgite;
s2, mixing 6 parts of tetraethylammonium bromide, 2 parts of sodium octyloxy hydroxylamine and 192 parts of water to obtain a mixed solution;
s3, weighing 25 parts of the dried attapulgite, adding the weighed 25 parts of the dried attapulgite into 200 parts of the mixed solution, treating the mixture at 80 ℃ for 2.5 hours, washing the mixture with water, filtering the mixture, drying the mixture at 85 ℃, and crushing the mixture to obtain the modified attapulgite.
Example 2
The preparation method of the soil pollution repairing agent comprises the following steps:
15 parts of modified attapulgite, 12 parts of TS-1 molecular sieve, 2 parts of 10X molecular sieve, 5 parts of sepiolite (with the particle size of 120-150 nm), 5 parts of vermiculite (with the particle size of 70-80 nm), 5 parts of bentonite (with the particle size of 140-180 nm), 3 parts of iron powder, 3 parts of sodium lignosulfonate, 1.5 parts of 4-aminophenyl sodium phosphate and 75 parts of water are uniformly mixed in a stirrer to obtain the soil pollution repairing agent.
The preparation method of the modified attapulgite comprises the following steps:
s1, drying attapulgite (with the particle size of 60-70 nm) in a 110 ℃ oven for 2 hours to obtain dried attapulgite;
s2, mixing 6 parts of tetraethylammonium bromide, 4 parts of sodium octyloxy hydroxylamine and 190 parts of water to obtain a mixed solution;
s3, weighing 25 parts of the dried attapulgite, adding the weighed 25 parts of the dried attapulgite into 200 parts of the mixed solution, treating the mixture for 2 hours at 85 ℃, washing the mixture with water, filtering the mixture, drying the mixture at 85 ℃, and crushing the dried mixture to obtain the modified attapulgite.
Example 3
The preparation method of the soil pollution repairing agent comprises the following steps:
the soil pollution restoration agent is prepared by uniformly mixing 20 parts of modified attapulgite, 11.25 parts of TS-1 molecular sieve, 3.75 parts of 4A molecular sieve, 6 parts of sepiolite (with the particle size of 150-200 nm), 6 parts of vermiculite (with the particle size of 80-100 nm), 6 parts of bentonite (with the particle size of 180-200 nm), 4 parts of iron powder, 4 parts of sodium lignosulfonate, 2 parts of 4-aminobenzene sodium phosphate and 80 parts of water in a stirrer.
The preparation method of the modified attapulgite comprises the following steps:
s1, drying attapulgite (with the particle size of 70-80 nm) in a 110 ℃ oven for 2 hours to obtain dried attapulgite;
s2, mixing 6 parts of tetraethylammonium bromide, 6 parts of sodium octyloxy hydroxylamine and 188 parts of water to obtain a mixed solution;
s3, weighing 25 parts of the dried attapulgite, adding the weighed 25 parts of the dried attapulgite into 200 parts of the mixed solution, treating the mixture at 90 ℃ for 1.5 hours, washing the mixture with water, filtering the mixture, drying the mixture at 85 ℃, and crushing the mixture to obtain the modified attapulgite.
Example 4
Example 4 replaces the TS-1 molecular sieve with an equivalent amount of ZSM-5 molecular sieve as compared to example 1, except that example 1 is followed.
Example 5
Example 5 replaces the 4A molecular sieve with an equivalent amount of 13X molecular sieve as compared to example 1, except that example 1 is followed.
Example 6
In comparison with example 1, example 6 was not supplemented with TS-1 molecular sieves, and the other was the same as in example 1.
Example 7
Example 7 was not supplemented with 4A molecular sieve as in example 1, but was otherwise identical to example 1.
Example 8
Example 8 replaces the 4A molecular sieve with an equivalent amount of 5A molecular sieve as compared to example 1, except that example 1 is followed.
Example 9
In example 9, sodium octyloxy hydroxylamine was not added as in example 1, but the same as in example 1.
Example 10
In contrast to example 1, example 10 was not supplemented with tetraethylammonium bromide, and the other was the same as in example 1.
Comparative example 1
Comparative example 1 was conducted in the same manner as in example 1 except that the TS-1 molecular sieve and the 4A molecular sieve were not added as in example 1.
Comparative example 2
Comparative example 2 was conducted in the same manner as in example 1 except that the sodium salt of 4-aminophenylphosphate was not added as in example 1.
Comparative example 3
Comparative example 3 was not added with sodium lignin sulfonate as in example 1, and the other is the same as in example 1.
Comparative example 4
Comparative example 4 was conducted in the same manner as in example 1 except that sodium lignin sulfonate and 4-aminophenylphosphoric acid sodium salt were not added as in example 1.
Comparative example 5
The preparation method of the soil pollution repairing agent comprises the following steps:
uniformly mixing 10 parts of attapulgite (with the particle size of 50-60 nm), 6.7 parts of TS-1 molecular sieve, 3.3 parts of 4A molecular sieve, 4 parts of sepiolite (with the particle size of 100-120 nm), 4 parts of vermiculite (with the particle size of 50-70 nm), 4 parts of bentonite (with the particle size of 100-140 nm), 2 parts of iron powder, 2 parts of sodium lignin sulfonate, 1 part of 4-aminophenyl sodium phosphate and 70 parts of water in a stirrer to obtain a soil pollution repairing agent; wherein the attapulgite is dried in an oven at 110 ℃ for 2 hours before being added and then used.
Test examples
The soil remediation agents prepared in examples 1 to 10 and comparative examples 1 to 5 were tested for their effect on treatment of heavy metals in soil, and the test methods were as follows:
weighing 100g of polluted soil in a 1L beaker, adding 500mL of deionized water and 5g of soil restoration agent (removing water in the soil restoration agent), stirring for 7d, carrying out magnetic separation on the restoration agent, drying the polluted soil before and after treatment at 100 ℃, carrying out digestion and constant volume, filtering, measuring the heavy metal content of the polluted soil before and after treatment by using an atomic absorption spectrophotometer, and calculating the heavy metal removal rate, wherein the calculation formula is as follows;
removal rate (%) = (H) 0 -H 1 ）/H 0 ×100；
Wherein: h 0 The method comprises the following steps: heavy metal content in the soil before treatment; h 1 The method comprises the following steps: heavy metal content in the treated soil;
the measurement results are shown in Table 1.
TABLE 1 treatment effect of soil restoration agents in examples 1 to 10 and comparative examples 1 to 5
Compared with example 1, in example 4, the TS-1 molecular sieve is replaced by ZSM-5 with the same amount, in example 5, the 4A molecular sieve is replaced by 13X molecular sieve with the same amount, in example 6, only the 4A molecular sieve is added, in example 7, only the TS-1 molecular sieve is added, in comparative example 1, no 4A molecular sieve and TS-1 molecular sieve are added, and as a result, the removal rates of Cd, pb and Cr in soil by the soil restoration agent prepared in example 4-7 and comparative example 1 are lower than those in example 1, which indicates that the 4A molecular sieve and the TS-1 molecular sieve have a certain synergistic effect and can improve the removal rates of Cd, pb and Cr in soil.
Compared with the example 1, the comparative example 2 is free from adding 4-amino benzene sodium phosphate, the comparative example 3 is free from adding sodium lignin sulfonate, the comparative example 4 is free from adding 4-amino benzene sodium phosphate and sodium lignin sulfonate, and the removal rates of Cd, pb and Cr in soil of the soil restoration agents prepared in the comparative examples 2-4 are lower than those of the example 1, which shows that the removal rates of Cd, pb and Cr in soil can be improved by adding the 4-amino benzene sodium phosphate and the sodium lignin sulfonate simultaneously.
Compared with example 1, the attapulgite clay in comparative example 5 is not modified, example 9 is modified by using tetraethylammonium bromide only, example 10 is modified by using sodium octyloxy hydroxylamino acid, and the removal rates of Cd, pb and Cr in soil by the soil restoration agents prepared in comparative example 5 and examples 9-10 are lower than that in example 1, which shows that the removal rates of Cd, pb and Cr in soil by the soil restoration agent can be further improved by using tetraethylammonium bromide and sodium octyloxy hydroxylamino acid for modification.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The soil pollution repairing agent is characterized by comprising the following raw materials in parts by weight: 10-20 parts of modified attapulgite, 10-16 parts of molecular sieve, 4-6 parts of sepiolite, 4-6 parts of vermiculite, 4-6 parts of bentonite, 2-4 parts of iron powder, 2-4 parts of sodium lignin sulfonate, 1-2 parts of 4-aminophenyl sodium phosphate and 70-80 parts of water;
the modified attapulgite is obtained by treating attapulgite with a mixed solution; the mixed solution is obtained by mixing tetraethylammonium bromide, sodium octyloxy hydroxylamine and water;
the treatment is that the treatment is carried out for 1.5 to 2.5 hours at the temperature of 80 to 90 ℃;
before the attapulgite is added into the mixed solution, the attapulgite is dried in a baking oven at 110 ℃ for 2 hours.
2. A soil pollution remediation agent as claimed in claim 1, wherein said molecular sieve is comprised of a first molecular sieve and/or a second molecular sieve; the first molecular sieve is one of a ZSM-5 molecular sieve and a TS-1 molecular sieve, and the second molecular sieve is one of a 10X molecular sieve, a 13X molecular sieve, a 5A molecular sieve and a 4A molecular sieve.
3. A soil pollution remediation agent as claimed in claim 2, wherein said molecular sieve is comprised of a first molecular sieve and a second molecular sieve; the first molecular sieve is a TS-1 molecular sieve, and the second molecular sieve is a 4A molecular sieve.
4. The soil pollution remediation agent of claim 2, wherein the mass ratio of the first molecular sieve to the second molecular sieve is 3:0.5-1.5.
5. A soil pollution remediation agent according to claim 1 wherein the sum of the masses of tetraethylammonium bromide and sodium octyloxy hydroxyamine is between 4% and 6% by weight of the mixed solution.
6. The soil pollution remediation agent of claim 1 wherein the mass ratio of tetraethylammonium bromide to sodium octyloxy hydroxyamine is 3:1-3.
7. The method for preparing a soil pollution remediation agent of any one of claims 1 to 6, comprising the steps of: and mixing the raw materials to obtain the soil pollution repairing agent.
8. Use of a soil pollution remediation agent according to any one of claims 1 to 6 in the treatment of heavy metal contaminated soil.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351764A (en) * | 2018-10-25 | 2019-02-19 | 上海十方生态园林股份有限公司 | The passivator of cadmium in one kind of multiple heavy-metal contaminated soils |
| CN115404081A (en) * | 2022-07-29 | 2022-11-29 | 广西壮族自治区环境保护科学研究院 | Passivator for repairing heavy metal lead, zinc and arsenic combined pollution and application |
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| CN109848203A (en) * | 2019-03-23 | 2019-06-07 | 中国农业科学院农田灌溉研究所 | A kind of restorative procedure for Cadmium in Soil of degrading |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351764A (en) * | 2018-10-25 | 2019-02-19 | 上海十方生态园林股份有限公司 | The passivator of cadmium in one kind of multiple heavy-metal contaminated soils |
| CN115404081A (en) * | 2022-07-29 | 2022-11-29 | 广西壮族自治区环境保护科学研究院 | Passivator for repairing heavy metal lead, zinc and arsenic combined pollution and application |
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