CN105860989B - Soil remediation agent and application thereof in remediation of chlorohydrocarbon contaminated soil - Google Patents
Soil remediation agent and application thereof in remediation of chlorohydrocarbon contaminated soil Download PDFInfo
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- CN105860989B CN105860989B CN201610402088.9A CN201610402088A CN105860989B CN 105860989 B CN105860989 B CN 105860989B CN 201610402088 A CN201610402088 A CN 201610402088A CN 105860989 B CN105860989 B CN 105860989B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
Abstract
The invention provides a soil remediation agent and application thereof in remediation of chlorohydrocarbon-contaminated soil, belongs to the technical field of remediation of contaminated soil, and can efficiently degrade and remove chlorohydrocarbons in soil and improve the decomposition and removal capacity of the soil on chlorohydrocarbons. The soil remediation agent provided by the invention comprises the following raw materials: metal powder: 150-200 parts by weight; aerobic degradation bacteria: 100 to 500 parts by weight; humic acid: 100 to 600 parts by weight. The method can be used for repairing the soil polluted by the chlorohydrocarbon.
Description
Technical Field
The invention relates to the technical field of contaminated soil remediation, in particular to a soil remediation agent and application thereof in remediation of chlorohydrocarbon contaminated soil.
Background
With the rapid development of modern industry, the chlorocarbon organic matters are more and more widely used, not only can be used as dry cleaning agents, degreasing agents, refrigerants and bactericides, but also can be used as extracting agents of fats and oils, anesthetics, fire extinguishing agents, metal degreasing solvents and the like, and also is an industrial solvent with increasingly wide application, thereby having great market development prospect.
However, with the heavy use of chlorocarbon organic materials, the amount and variety of chlorocarbon organic materials introduced into the soil is increasing. Because the organic matters are difficult to degrade and remove, the organic matters are accumulated in soil and increasingly obvious harm is caused to animals, plants and human bodies.
At present, as no soil remediation agent aiming at the soil polluted by the chlorohydrocarbon exists in the market, a common soil remediation agent is still used when the soil polluted by the chlorohydrocarbon is remedied, but the common soil remediation agent cannot effectively degrade the chlorohydrocarbon in the soil polluted by the chlorohydrocarbon, so that the degradation efficiency is extremely low. Therefore, it would be an important subject of the research of those skilled in the art to develop a soil remediation agent which is specifically used for the soil polluted by chlorinated hydrocarbons and can efficiently degrade and remove the chlorinated hydrocarbons in the soil.
Disclosure of Invention
The invention aims to provide a soil remediation agent and application thereof in remediation of chlorohydrocarbon-contaminated soil, which can efficiently degrade and remove chlorohydrocarbons in soil and improve the decomposition and removal capacity of the soil on chlorohydrocarbons.
The invention provides a soil remediation agent, which comprises the following raw materials:
metal powder: 150-200 parts by weight;
aerobic degradation bacteria: 100 to 500 parts by weight;
humic acid: 100 to 600 parts by weight.
In a preferred technical scheme, the raw materials comprise:
metal powder: 171 parts by weight;
aerobic degradation bacteria: 200 parts by weight;
humic acid: 429 parts by weight.
In a preferred technical scheme, the raw materials comprise:
metal powder: 171 parts by weight;
aerobic degradation bacteria: 300 parts by weight;
humic acid: 429 parts by weight.
In an optional technical scheme, the metal powder is selected from iron powder or magnesium powder.
In an alternative embodiment, the aerobic degradation bacteria is selected from any strain of bacillus or any mixed strain thereof. Of course, the technical scheme is not limited to the above mentioned genera, but any genera that can effectively degrade the chlorinated hydrocarbon and accelerate the degradation of the chlorinated hydrocarbon in soil can be within the protection scope of the present application. It is understood that the strain in the genus Bacillus may be Bacillus subtilis, Bacillus pumilus, etc.
In another aspect of the present invention, there is provided a method for preparing a soil remediation agent according to any one of the above technical aspects, comprising:
and (3) taking the metal powder, the aerobic degradation bacteria and the humic acid according to the weight parts, and uniformly mixing for later use.
In still another aspect, the invention provides an application of the soil remediation agent according to any one of the technical schemes in remediation of chlorinated hydrocarbon-contaminated soil.
In an alternative embodiment, the chlorinated hydrocarbon is selected from at least one of dichloroethane, trichloroethane, and dichloroethylene.
The invention provides a soil repairing agent, compared with the prior art, the soil repairing agent is added with metal powder, aerobic degradation bacteria and humic acid, wherein, in soil and water containing halogen organic chemical pollutants, the addition of the metal powder can create an anaerobic and reductive environment, so that the dehalogenation capability of the halogen organic chemical pollutants is improved, and the degradation capability of the chemical pollutants is enhanced; the aerobic degradation bacteria are high-efficiency chlorohydrocarbon degradation bacteria, and the addition of the aerobic degradation bacteria can greatly accelerate the degradation of chlorohydrocarbon in soil; and humic acid can provide nutrient substances required by growth for bacteria, so that the survival time of the bacteria is prolonged, and the high-efficiency degradation capability of soil is maintained. Based on the synergistic effect of the components, on one hand, the soil remediation agent can realize efficient degradation and removal of chlorohydrocarbons in soil and improve the decomposition and removal capacity of the soil on the chlorohydrocarbons, and on the other hand, the soil remediation agent has good stability and environmental friendliness, is low in cost and easy to popularize in a large area, so that the remediation treatment target is achieved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Weighing 150 parts by weight of iron powder, 120 parts by weight of bacillus and 300 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 1.
Example 2
Weighing 171 parts by weight of iron powder, 200 parts by weight of bacillus and 429 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 2.
Example 3
Weighing 171 parts by weight of magnesium powder, 200 parts by weight of bacillus and 429 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 3.
Example 4
Weighing 171 parts by weight of iron powder, 300 parts by weight of bacillus and 429 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 4.
Example 5
Weighing 171 parts by weight of magnesium powder, 300 parts by weight of bacillus and 429 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 5.
Example 6
Weighing 200 parts by weight of magnesium powder, 350 parts by weight of bacillus and 600 parts by weight of humic acid, and uniformly mixing for later use to obtain the soil remediation agent 6.
Performance testing
The soil remediation agent 2-5 prepared in example 2-5 was used as an example for remediation tests of chlorinated hydrocarbon contaminated soil. Specifically, the mixture is mixed with dichloroethane, trichloroethane and dichloroethylene contaminated soil respectively, wherein the initial concentration of the dichloroethane DCA in the contaminated soil is 1000 mg.L-1The initial concentration of trichloroethane TCA was 1500 mg.L-1Initial concentration of dichloroethylene DCE was 180 mg.L-1(the initial concentrations of each pollutant listed in the test are residual concentrations of pollutants in soil with generally severe pollution), and the blank group is the polluted soil without adding the soil remediation agent.
The specific implementation is as follows:
continuously monitoring the concentration of the chlorinated hydrocarbon in the soil within 1 day of adding the soil remediation agent, then sampling on 8 days and 28 days of adding the soil remediation agent, and detecting the concentration of the chlorinated hydrocarbon in the soil, wherein specific results are shown in tables 1-3 and are as follows:
TABLE 1 chlorinated Hydrocarbon concentration in Dichloroethane-contaminated soil
Note: ND means not detected
TABLE 2 chlorinated hydrocarbon concentration in trichloroethane contaminated soil
Note: ND means not detected
TABLE 3 chlorinated hydrocarbon concentration in soil contaminated by dichloroethylene
Note: ND means not detected
From the results in the above table, it is understood that after 24 hours, the concentrations of dichloroethane in the soil conditioner 2-5 and the soil treated in the blank group were reduced by 75.1%, 77.3%, 76.4%, 76.7%, 3.8%, trichloroethane by 80.9%, 83.7%, 84.5%, 83.9%, 0.9%, and dichloroethylene by 75.6%, 82.2%, 86.1%, 82.8%, 2.2%, respectively. It is clear that the degradation rate of the soil remediation agent 2-5 to chlorinated hydrocarbon in 24 hours is far higher than that of the control group. And in the detection of 8 days, the chlorinated hydrocarbons in the soil added with the soil remediation agents 2-6 are almost completely degraded, and in the detection of 28 days, the chlorinated hydrocarbons in the soil are completely degraded, while the chlorinated hydrocarbons in the blank group are still maintained at a high content and the degradation speed is slow. Therefore, the soil remediation agent provided by the embodiment of the application can efficiently degrade and remove the chlorinated hydrocarbons in the soil, and improves the decomposition and removal capacity of the soil on the chlorinated hydrocarbons.
Claims (4)
1. The application of the soil remediation agent in remediation of chlorinated hydrocarbon contaminated soil is characterized in that the soil remediation agent comprises the following raw materials:
metallic iron powder or magnesium powder: 150-200 parts by weight;
aerobic degradation bacteria: 100 to 500 parts by weight;
humic acid: 100 to 600 parts by weight;
the chlorinated hydrocarbon is selected from at least one of dichloroethane, trichloroethane and dichloroethylene;
the aerobic degradation bacteria are selected from any strain of bacillus or any mixed strain thereof.
2. The use of claim 1, wherein said soil remediation agent comprises the raw material composition of:
metallic iron powder or magnesium powder: 171 parts by weight;
aerobic degradation bacteria: 200 parts by weight;
humic acid: 429 parts by weight.
3. The use of claim 1, wherein said soil remediation agent comprises the raw material composition of:
metallic iron powder or magnesium powder: 171 parts by weight;
aerobic degradation bacteria: 300 parts by weight;
humic acid: 429 parts by weight.
4. Use according to any one of claims 1 to 3, comprising:
and taking metal iron powder or magnesium powder, aerobic degradation bacteria and humic acid according to the weight parts, and uniformly mixing for later use.
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| CN201610402088.9A CN105860989B (en) | 2016-06-06 | 2016-06-06 | Soil remediation agent and application thereof in remediation of chlorohydrocarbon contaminated soil |
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| CN201610402088.9A CN105860989B (en) | 2016-06-06 | 2016-06-06 | Soil remediation agent and application thereof in remediation of chlorohydrocarbon contaminated soil |
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| CN105860989B true CN105860989B (en) | 2020-03-10 |
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| CN102517028A (en) * | 2011-09-29 | 2012-06-27 | 李小平 | Curing agent for in situ restoration of polychloroalkane compound polluted soil |
| CN103119119A (en) * | 2010-09-24 | 2013-05-22 | 同和环保再生事业有限公司 | Organic halogen compound decomposition agent containing iron particles, and process for production thereof |
| CN103328133A (en) * | 2011-01-17 | 2013-09-25 | 同和环保再生事业有限公司 | Method for producing iron powder for processing organic halogen compounds, and method for purifying contaminated soil or groundwater |
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| US6303367B1 (en) * | 1997-02-07 | 2001-10-16 | Ebara Corporation | Method for purifying matter contaminated with halogenated organic compounds |
| CN101104177B (en) * | 2007-08-01 | 2010-12-15 | 中国石油化工股份有限公司 | In-situ biological repairing method for biomass intensified petroleum contaminative soil |
| JP6410188B2 (en) * | 2013-07-31 | 2018-10-31 | 国立大学法人名古屋大学 | Electronic transmission system and its use |
| CN104971938B (en) * | 2015-07-03 | 2017-02-22 | 广东省生态环境与土壤研究所（广东省土壤科学博物馆） | Iron based-humus composite material and application thereof in soil heavy metal pollution control |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103119119A (en) * | 2010-09-24 | 2013-05-22 | 同和环保再生事业有限公司 | Organic halogen compound decomposition agent containing iron particles, and process for production thereof |
| CN103328133A (en) * | 2011-01-17 | 2013-09-25 | 同和环保再生事业有限公司 | Method for producing iron powder for processing organic halogen compounds, and method for purifying contaminated soil or groundwater |
| CN102517028A (en) * | 2011-09-29 | 2012-06-27 | 李小平 | Curing agent for in situ restoration of polychloroalkane compound polluted soil |
Non-Patent Citations (1)
| Title |
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| 《纳米零价铁及其与微生物联合修复多氯联苯污染土壤》;陈曦;《浙江大学硕士学位论文》;20140301;1.4微生物协同纳米零价铁环境修复研究进展、第4章纳米零价铁与微生物联合模拟修复多氯联苯污染土壤 * |
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Effective date of registration: 20210528 Address after: 214000 room 1002, 52 Jingxian Road, Xinwu District, Wuxi City, Jiangsu Province Patentee after: Wuxi Yuheng Environmental Technology Co.,Ltd. Address before: No. 11, Fushun Road, North District, Qingdao, Shandong Patentee before: QINGDAO TECHNOLOGICAL University |