CN114180703A - Persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution - Google Patents
Persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution Download PDFInfo
- Publication number
- CN114180703A CN114180703A CN202111643420.8A CN202111643420A CN114180703A CN 114180703 A CN114180703 A CN 114180703A CN 202111643420 A CN202111643420 A CN 202111643420A CN 114180703 A CN114180703 A CN 114180703A
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- Prior art keywords
- persulfate
- mixture
- underground water
- chlorinated hydrocarbon
- substance
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/14—Additives which dissolves or releases substances when predefined environmental conditions are reached, e.g. pH or temperature
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- 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)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution. The preparation process of the material comprises the steps of preparing a mixture A from sodium alginate and sandy soil; adding sodium persulfate into the mixture A to prepare a mixture B; pouring the mixture B into a film and air-drying to obtain a substance C; dissolving ethyl cellulose and stearic acid in ethanol to prepare a coating solution D; and (3) uniformly spraying the coating solution D on the surface of the substance C, and air-drying to obtain a substance, namely the persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution. The method has the advantages that the preparation method of the material is simple, the operation is convenient, the preparation cost is low, the persulfate can be stably and slowly released for a long time, the utilization efficiency and the remediation effect of the persulfate are improved, and the obtained material can be used for in-situ remediation of underground water chlorinated hydrocarbon pollution.
Description
Technical Field
The invention belongs to the technical field of restoring and treating underground water polluted by hydrochloric ether, and particularly relates to a persulfate slow-release material for restoring underground water polluted by hydrochloric ether in situ.
Background
The chlorinated hydrocarbon pollutants have the characteristics of high volatility, low viscosity, low water solubility, difficult degradability and the like, have great threat to the life health and safety of human beings, and urgently need an efficient and economic technology for removal. The remediation of underground water polluted by hydrochloric ether is mostly carried out by adopting an in-situ remediation mode, and the technology has good effects in underground water remediation projects at home and abroad, and mainly comprises a permeable reactive barrier technology, a microbial remediation technology, a chemical oxidation technology, an in-situ electrochemical remediation technology and the like. Among them, chemical oxidation techniques are receiving more and more attention, and commonly used oxidants include potassium permanganate, ozone, hydrogen peroxide, persulfate and the like. Persulfate is considered to be one of the oxidants widely used at present due to the characteristics of low cost, good stability, convenience in storage and transportation, long free radical life and the like. However, due to the strong oxidizing property of persulfate, if persulfate oxidizer is directly injected into polluted groundwater, the release rate of persulfate oxidizer is usually fast in the initial stage, so that the utilization rate of oxidizer is low, and the expected repairing effect cannot be achieved, so that the application of the technology is limited. The slow release technology is to change the combination mode of the drug and the material by adopting specific measures to control the release rate of the drug, so that the drug can maintain a certain effective concentration in the system and the utilization rate of the drug can be improved. The sustained release technology can not only increase the stability of each active component to a certain extent, but also prolong the action time of the medicament, and can be applied to a plurality of fields of environmental management. Therefore, achieving a slow release of persulfate in groundwater is a major research focus for improving the use efficiency and chlorinated hydrocarbon degradation efficiency of persulfate. At present, materials capable of slowly releasing persulfate are lacking.
Disclosure of Invention
The invention aims to provide a persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution. The preparation method comprises the following specific steps:
(1) at the temperature of 25 ℃, 50 g of sodium alginate and 10 g of sandy soil are added into a beaker with the volume of 500mL, 200mL of deionized water is added, and the mixture is stirred for 20min at the speed of 600r/min to prepare a mixture A;
(2) adding 20 g of sodium persulfate into the mixture A, and stirring for 5 hours at the speed of 600r/min to obtain a mixture B;
(3) pouring the mixture B into a film with the length, width and height of 4cm, 6cm and 7cm respectively, and then air-drying at 25 ℃ for 24 hours to obtain a substance C;
(5) dissolving 30 g of ethyl cellulose and 10 g of stearic acid in 200mL of ethanol to prepare a coating solution D;
(6) and uniformly spraying the coating solution D on the surface of the substance C, and air-drying for 24 hours at 25 ℃ to obtain the substance, namely the persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution.
The method has the advantages that the preparation method of the material is simple, the operation is convenient, the preparation cost is low, the persulfate can be stably and slowly released for a long time, the utilization efficiency and the remediation effect of the persulfate are improved, and the obtained material can be used for in-situ remediation of underground water chlorinated hydrocarbon pollution.
Detailed Description
The invention provides a persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution, which is implemented by the following example:
example 1.
(1) At the temperature of 25 ℃, 50 g of sodium alginate and 10 g of sandy soil are added into a beaker with the volume of 500mL, 200mL of deionized water is added, and the mixture is stirred for 20min at the speed of 600r/min to prepare a mixture A;
(2) adding 20 g of sodium persulfate into the mixture A, and stirring for 5 hours at the speed of 600r/min to obtain a mixture B;
(3) pouring the mixture B into a film with the length, width and height of 4cm, 6cm and 7cm respectively, and then air-drying at 25 ℃ for 24 hours to obtain a substance C;
(5) dissolving 30 g of ethyl cellulose and 10 g of stearic acid in 200mL of ethanol to prepare a coating solution D;
(6) and (3) uniformly spraying the coating solution D on the surface of the substance C, and air-drying for 24 hours at 25 ℃ to obtain the substance, namely the persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution.
The sulfate slow-release material obtained by the invention can prolong the slow-release service life by 10-20 times and effectively degrade chlorohydrocarbon pollutants in underground water.
Claims (1)
1. A persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution is characterized by comprising the following specific steps:
(1) at the temperature of 25 ℃, 50 g of sodium alginate and 10 g of sandy soil are added into a beaker with the volume of 500mL, 200mL of deionized water is added, and the mixture is stirred for 20min at the speed of 600r/min to prepare a mixture A;
(2) adding 20 g of sodium persulfate into the mixture A, and stirring for 5 hours at the speed of 600r/min to obtain a mixture B;
(3) pouring the mixture B into a film with the length, width and height of 4cm, 6cm and 7cm respectively, and then air-drying at 25 ℃ for 24 hours to obtain a substance C;
(5) dissolving 30 g of ethyl cellulose and 10 g of stearic acid in 200mL of ethanol to prepare a coating solution D;
(6) and (3) uniformly spraying the coating solution D on the surface of the substance C, and air-drying for 24 hours at 25 ℃ to obtain the substance, namely the persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643420.8A CN114180703A (en) | 2021-12-30 | 2021-12-30 | Persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111643420.8A CN114180703A (en) | 2021-12-30 | 2021-12-30 | Persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114180703A true CN114180703A (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111643420.8A Pending CN114180703A (en) | 2021-12-30 | 2021-12-30 | Persulfate slow-release material for in-situ remediation of underground water chlorinated hydrocarbon pollution |
Country Status (1)
| Country | Link |
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| CN (1) | CN114180703A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116354487A (en) * | 2023-03-30 | 2023-06-30 | 长安大学 | Double-coating persulfate slow-release material and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100227381A1 (en) * | 2007-07-23 | 2010-09-09 | Verutek Technologies, Inc. | Enhanced biodegradation of non-aqueous phase liquids using surfactant enhanced in-situ chemical oxidation |
| CN104628120A (en) * | 2015-01-28 | 2015-05-20 | 南通国盛环境修复有限责任公司 | Novel sustained-release material for groundwater remediation and preparation method thereof |
| CN110947752A (en) * | 2019-12-25 | 2020-04-03 | 中国电建集团中南勘测设计研究院有限公司 | In-situ chemical oxidation remediation device for simulating polluted underground water and using method |
| CN113332756A (en) * | 2021-06-03 | 2021-09-03 | 中南大学 | Calcium sulfide-based slow-release vulcanizing agent and preparation method and application thereof |
-
2021
- 2021-12-30 CN CN202111643420.8A patent/CN114180703A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100227381A1 (en) * | 2007-07-23 | 2010-09-09 | Verutek Technologies, Inc. | Enhanced biodegradation of non-aqueous phase liquids using surfactant enhanced in-situ chemical oxidation |
| CN104628120A (en) * | 2015-01-28 | 2015-05-20 | 南通国盛环境修复有限责任公司 | Novel sustained-release material for groundwater remediation and preparation method thereof |
| CN110947752A (en) * | 2019-12-25 | 2020-04-03 | 中国电建集团中南勘测设计研究院有限公司 | In-situ chemical oxidation remediation device for simulating polluted underground water and using method |
| CN113332756A (en) * | 2021-06-03 | 2021-09-03 | 中南大学 | Calcium sulfide-based slow-release vulcanizing agent and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 黄智辉等: "过硫酸盐高级氧化降解水体中有机污染物研究进展", 《化工进展》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116354487A (en) * | 2023-03-30 | 2023-06-30 | 长安大学 | Double-coating persulfate slow-release material and preparation method and application thereof |
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Application publication date: 20220315 |