CN112646584A - Slow-release oxidant for treating organic contaminated soil and preparation method thereof - Google Patents
Slow-release oxidant for treating organic contaminated soil and preparation method thereof Download PDFInfo
- Publication number
- CN112646584A CN112646584A CN202011636420.0A CN202011636420A CN112646584A CN 112646584 A CN112646584 A CN 112646584A CN 202011636420 A CN202011636420 A CN 202011636420A CN 112646584 A CN112646584 A CN 112646584A
- Authority
- CN
- China
- Prior art keywords
- slow
- release
- oxidizing agent
- oxidant
- contaminated soil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a slow-release oxidant for treating organic contaminated soil and a preparation method thereof, which comprises the steps of weighing quantitative persulfate or permanganate to prepare a solution, adding quantitative oxidant carrier powder into the solution, uniformly stirring to obtain slurry, placing the slurry at room temperature for moisturizing and standing, drying at 30 ℃, cooling to room temperature, and crushing to obtain slow-release oxidant powder. The pesticide has the advantages of high use efficiency, wide use range, environmental protection, small secondary pollution and high safety in transportation, storage and use.
Description
Technical Field
The invention belongs to the technical field of regeneration of polluted soil, and particularly relates to a slow-release oxidant for treating organic polluted soil and a preparation method thereof.
Background
In recent years, with the acceleration of urbanization and the implementation of old city transformation policies, a lot of sites left by relocation of enterprises in the chemical industry, petrochemical industry, pesticide industry and other heavily polluted industries appear. Through sampling, investigation and evaluation of related units, the concentration of organic pollutants existing in soil and underground water in the retired field of industrial enterprises seriously exceeds the standard, and the surrounding ecological environment is influenced. With the changing of more and more urban industrial land into residential land or public land for greening, entertainment and the like, the exposed polluted soil will pose a serious threat to the health of surrounding people, environmental disputes and personal hazard accidents caused by the polluted soil are sometimes happened and reported, and the treatment work of the polluted soil becomes an important work inevitable in China and related to the livelihood.
The chemical oxidation technology is directed to adding/injecting specific chemical oxidation agents into polluted soil or underground water, and degrading organic pollutants in the soil or underground water into carbon dioxide and water or converting the organic pollutants into low-toxicity substances through chemical oxidation. The chemical oxidation technology can be used in situ or ex situ, and is one of the mainstream repair technologies for site repair at present. At present, most of oxidizing agents used for repairing domestic organic polluted sites comprise hydrogen peroxide, fenton, persulfate and the like, and persulfate has the advantages of stable property, mild reaction, easiness in purchase and the like, so that the application proportion is high. In the field repairing application, the oxidant is mainly directly injected into underground water or added into soil in a solution form, the repairing effect at the initial stage of the reaction is obvious, but the effective acting time of the conventional oxidizing agent is generally short, the consumption of effective oxidizing components is high, and the efficiency of the repairing at the middle and later stages is low.
In order to improve the action time of an oxidation medicament, Chinese patent (patent number ZL 2011210310111.3) discloses an in-situ chemical oxidation remediation method of chlorohydrocarbon polluted soil and underground water, wherein paraffin, silica sand and potassium permanganate are prepared into a slow release agent; chinese patent (patent number ZL 201611062399.1) discloses a ferrous-activated persulfate slow-release candle for in-situ oxidation remediation of underground water, wherein a slow-release agent is prepared from fly ash, paraffin and the like persulfate; the two slow release agents use paraffin as a curing agent, and probably have better effect on the slow release of an oxidant, but the main component of the paraffin is straight-chain alkane (about 80-95 percent), so that the exceeding of petroleum hydrocarbon of soil or underground water is easily caused by improper use, and meanwhile, the paraffin is difficult to be mixed with clean water for injection due to poor hydrophilicity, and the practical use mode is also limited.
Chinese patent (patent No. ZL 201210051606.9) discloses a persulfate slow-release material for a permeable reactive barrier and a preparation method thereof, wherein cement, sand, zeolite and other persulfate are adopted to prepare a slow-release agent; although the slow release agent has small influence on the environment, the slow release agent is suitable for being used as a permeable reactive wall material because the particles of the slow release agent are large and the application range is limited, and cannot be used for injection in a polluted area.
Disclosure of Invention
Aiming at the technical problems, the invention provides an optimized slow-release oxidant for treating organic contaminated soil and a preparation method thereof.
The invention adopts the technical scheme that a preparation method of a slow-release oxidant for treating organic contaminated soil comprises the following steps:
step 1: weighing a certain amount of persulfate or permanganate, dissolving the persulfate or permanganate in water to prepare a solution; among them, there is no particular limitation on the water that dissolves the persulfate or permanganate, including but not limited to deionized water, clear water, distilled water, purified water.
Step 2: adding a certain amount of oxidant carrier powder into the solution prepared in the step 1, and uniformly stirring to obtain slurry;
and step 3: placing the slurry at room temperature, moisturizing and standing for 1-5 days, wherein the sealing, moisturizing and maintaining are generally carried out for 2 days;
and 4, step 4: and drying the slurry after the moisture retention and standing at 30 ℃, cooling to room temperature, and crushing by using a counter-roller to finally obtain the slow-release oxidant powder.
Preferably, the persulfate is one of sodium persulfate, potassium persulfate and ammonium persulfate.
Preferably, the permanganate salt is potassium permanganate or sodium permanganate.
Preferably, in the step 1, the concentration of the solution is 0.2-1 mol/L.
Preferably, the oxidant carrier is one or two of bentonite, attapulgite, zeolite and diatomite.
Preferably, in the step 2, the mass ratio of the solution to the oxidant carrier powder is 1-3: 1.
Preferably, in the step 3, the room temperature is 20-40 ℃.
Preferably, in the step 4, the particle size range of the obtained slow-release oxidizing agent powder is 1 mm-8 mm.
A slow-release oxidant for treating organic contaminated soil, which is prepared by adopting a preparation method.
The invention has the following beneficial effects:
(1) the medicament use efficiency is high; the slow release of the oxidant is realized through the clay mineral powder loading, the loss of the medicament is reduced, and the use efficiency of the medicament is improved;
(2) the application range of the medicament is wide; the medicament developed by the method can be used for oxidizing organic pollutants in situ in the polluted feather, can also be used for ex-situ treatment of organic polluted soil, and can also be used as a vertical barrier wall material for slowing down the flow speed of underground water while oxidizing the organic pollutants in the underground water;
(3) the medicament is green and environment-friendly, and has small secondary pollution; the slow-release oxidant developed by the method takes natural clay minerals as carriers, is non-toxic and harmless, and has good compatibility with soil, so that the influence on the physical and chemical properties of the soil is small, meanwhile, the oxidant is added in a clay mineral loading form, and the influence on the quality of the soil and underground water caused by adding a large amount of oxidant at one time is avoided through slow release;
(4) the medicament has high safety in transportation, storage and use; the clay mineral powder is heat-resistant, fire-resistant and water-resistant, and has good physical and chemical stability, compared with the oxidant loaded by the clay mineral powder, the oxidant loaded by the clay mineral powder has more stable and safer performance, and the safety in the processes of transportation, storage and use is obviously improved.
Detailed Description
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited thereto.
Example 1, the preparation method was:
(1) weighing a certain amount of sodium persulfate, and dissolving the sodium persulfate in clear water to prepare a 1 mol/L solution;
(2) adding a certain amount of diatomite powder into the sodium persulfate solution prepared in the step (1) according to the mass ratio of the oxidant solution to the carrier powder of 1:1, and uniformly stirring;
(3) placing the slurry prepared in the step (2) at room temperature, preserving moisture and standing for 2 days;
(4) and (4) drying the slurry prepared in the step (3) at 30 ℃, and crushing the slurry by using a pair roller after cooling to normal temperature (room temperature) to finally obtain the slow-release sodium persulfate oxidant.
Example 2, the preparation method was:
(1) weighing a certain amount of potassium permanganate, dissolving the potassium permanganate in clear water to prepare a 0.2 mol/L solution;
(2) adding a certain amount of bentonite powder into the potassium permanganate solution prepared in the step (1) according to the mass ratio of the oxidant solution to the carrier powder of 3:1, and uniformly stirring;
(3) placing the slurry prepared in the step (2) at room temperature, preserving moisture and standing for 2 days;
(4) and (4) drying the slurry prepared in the step (3) at 30 ℃, and crushing the slurry by using a double-roller machine after cooling to normal temperature (room temperature) to finally obtain the slow-release potassium permanganate oxidant.
Example 3, the preparation method was:
(1) weighing a certain amount of sodium persulfate, and dissolving the sodium persulfate in clear water to prepare a 0.5 mol/L solution;
(2) adding bentonite and attapulgite powder into the sodium persulfate solution prepared in the step (1) according to the mass ratio of 1:1 of the oxidant solution to the carrier powder of 2:1, and uniformly stirring;
(3) placing the slurry prepared in the step (2) at room temperature, preserving moisture and standing for 2 days;
(4) and (4) drying the slurry prepared in the step (3) at 30 ℃, and crushing the slurry by using a pair roller after cooling to normal temperature (room temperature) to finally obtain the slow-release sodium persulfate oxidant.
Claims (9)
1. A preparation method of a slow-release oxidant for treating organic contaminated soil is characterized by comprising the following steps: the preparation method comprises the following steps:
step 1: weighing a certain amount of persulfate or permanganate, dissolving the persulfate or permanganate in water to prepare a solution;
step 2: adding a certain amount of oxidant carrier powder into the solution prepared in the step 1, and uniformly stirring to obtain slurry;
and step 3: placing the slurry at room temperature, preserving moisture and standing for 1-5 days;
and 4, step 4: and drying the slurry after the moisture retention and standing, cooling to room temperature, and crushing by using a double-roller machine to finally obtain the slow-release oxidant powder.
2. The method for preparing the slow-release oxidizing agent for treating the organic contaminated soil according to claim 1, wherein the slow-release oxidizing agent comprises: the persulfate is one of sodium persulfate, potassium persulfate and ammonium persulfate.
3. The method for preparing the slow-release oxidizing agent for treating the organic contaminated soil according to claim 1, wherein the slow-release oxidizing agent comprises: the permanganate is potassium permanganate or sodium permanganate.
4. The method for preparing a slow-release oxidizing agent for remediating organically-polluted soil as claimed in claim 1, 2 or 3, wherein: in the step 1, the concentration of the solution is 0.2-1 mol/L.
5. The method for preparing the slow-release oxidizing agent for treating the organic contaminated soil according to claim 1, wherein the slow-release oxidizing agent comprises: the oxidant carrier is one or two of bentonite, attapulgite, zeolite and diatomite.
6. The method for preparing a slow-release oxidizing agent for remediating organically-polluted soil as claimed in claim 1 or 5, wherein the method comprises the steps of: in the step 2, the mass ratio of the solution to the oxidant carrier powder is 1-3: 1.
7. The method for preparing the slow-release oxidizing agent for treating the organic contaminated soil according to claim 1, wherein the slow-release oxidizing agent comprises: in the step 3, the room temperature is 20-40 ℃.
8. The method for preparing the slow-release oxidizing agent for treating the organic contaminated soil according to claim 1, wherein the slow-release oxidizing agent comprises: in the step 4, the particle size of the obtained slow-release oxidant powder is 1 mm-8 mm.
9. A slow-release oxidant for treating organic contaminated soil prepared by the preparation method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636420.0A CN112646584A (en) | 2020-12-31 | 2020-12-31 | Slow-release oxidant for treating organic contaminated soil and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011636420.0A CN112646584A (en) | 2020-12-31 | 2020-12-31 | Slow-release oxidant for treating organic contaminated soil and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112646584A true CN112646584A (en) | 2021-04-13 |
Family
ID=75367939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011636420.0A Pending CN112646584A (en) | 2020-12-31 | 2020-12-31 | Slow-release oxidant for treating organic contaminated soil and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112646584A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713280A (en) * | 2022-03-09 | 2022-07-08 | 同济大学 | Preparation method of supported catalyst for catalytic oxidation treatment of refractory wastewater by ozone |
| CN116656373A (en) * | 2023-05-09 | 2023-08-29 | 亚泰电化有限公司 | Preparation method of sodium persulfate for soil treatment |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101690888A (en) * | 2009-10-16 | 2010-04-07 | 清华大学 | Method for preparing chemical absorbent with porous mineral |
| CN102583694A (en) * | 2012-03-01 | 2012-07-18 | 中国环境科学研究院 | Persulfate slow-release material used for permeable reactive barrier and preparation method thereof |
| CN102897891A (en) * | 2012-08-28 | 2013-01-30 | 华侨大学 | Preparation method of composite potassium permanganate sustained-release agent |
| 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 |
| CN106277226A (en) * | 2016-09-19 | 2017-01-04 | 中国环境科学研究院 | A kind of combination unit removing subsoil water combined pollution and method |
| CN106477648A (en) * | 2016-11-28 | 2017-03-08 | 辽宁石油化工大学 | A kind of persulfate for in-situ remediation of underground water is sustained candle |
| CN108144574A (en) * | 2017-12-26 | 2018-06-12 | 大连全净科技有限公司 | A kind of preparation method of the carrier granular for the adsorbing-oxidising type for removing pollution gas |
| CN108483623A (en) * | 2018-04-09 | 2018-09-04 | 重庆大学 | A kind of oxygen slow-release material and preparation method thereof and preparation facilities improving water bottom environment |
| CN108607483A (en) * | 2018-04-28 | 2018-10-02 | 汉广中药科技（天津）有限公司 | A kind of Chinese medicine curing agent with oxygen slow release function and preparation method thereof and application method |
| CN108706745A (en) * | 2018-06-13 | 2018-10-26 | 合肥工业大学 | A kind of processing method of high ferrimanganic ammonia nitrogen combined pollution low temperature underground water |
-
2020
- 2020-12-31 CN CN202011636420.0A patent/CN112646584A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101690888A (en) * | 2009-10-16 | 2010-04-07 | 清华大学 | Method for preparing chemical absorbent with porous mineral |
| CN102583694A (en) * | 2012-03-01 | 2012-07-18 | 中国环境科学研究院 | Persulfate slow-release material used for permeable reactive barrier and preparation method thereof |
| CN102897891A (en) * | 2012-08-28 | 2013-01-30 | 华侨大学 | Preparation method of composite potassium permanganate sustained-release agent |
| 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 |
| CN106277226A (en) * | 2016-09-19 | 2017-01-04 | 中国环境科学研究院 | A kind of combination unit removing subsoil water combined pollution and method |
| CN106477648A (en) * | 2016-11-28 | 2017-03-08 | 辽宁石油化工大学 | A kind of persulfate for in-situ remediation of underground water is sustained candle |
| CN108144574A (en) * | 2017-12-26 | 2018-06-12 | 大连全净科技有限公司 | A kind of preparation method of the carrier granular for the adsorbing-oxidising type for removing pollution gas |
| CN108483623A (en) * | 2018-04-09 | 2018-09-04 | 重庆大学 | A kind of oxygen slow-release material and preparation method thereof and preparation facilities improving water bottom environment |
| CN108607483A (en) * | 2018-04-28 | 2018-10-02 | 汉广中药科技（天津）有限公司 | A kind of Chinese medicine curing agent with oxygen slow release function and preparation method thereof and application method |
| CN108706745A (en) * | 2018-06-13 | 2018-10-26 | 合肥工业大学 | A kind of processing method of high ferrimanganic ammonia nitrogen combined pollution low temperature underground water |
Non-Patent Citations (1)
| Title |
|---|
| 许书刚: "蒙脱石负载高锰酸钾对地下水中氯代烃的降解实验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713280A (en) * | 2022-03-09 | 2022-07-08 | 同济大学 | Preparation method of supported catalyst for catalytic oxidation treatment of refractory wastewater by ozone |
| CN116656373A (en) * | 2023-05-09 | 2023-08-29 | 亚泰电化有限公司 | Preparation method of sodium persulfate for soil treatment |
| CN116656373B (en) * | 2023-05-09 | 2023-12-01 | 亚泰电化有限公司 | Preparation method of sodium persulfate for soil treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112457858A (en) | Chemical oxidation remediation agent for organic contaminated soil and use method | |
| CN112646584A (en) | Slow-release oxidant for treating organic contaminated soil and preparation method thereof | |
| CN110759680B (en) | Red mud utilization method based on cooperative treatment of industrial tail gas, sewage treatment and green high-performance civil functional material | |
| CN105347519B (en) | A kind of nano-bubble generator and its application | |
| CN103773379A (en) | Stabilizing agent applicable to soil with combined pollution of heavy metals and semi-volatile organic compounds and use method thereof | |
| CN103084152B (en) | A kind of efficient processing method improving attapulgite, diatomite microstructure and absorption property | |
| CN113233570A (en) | Preparation method of sodium bentonite loaded zero-valent iron and application of sodium bentonite loaded zero-valent iron in treatment of composite polluted underground water | |
| CN107487997B (en) | Red mud treatment method | |
| CN106747371A (en) | Ceramic fracturing sand with oil-wet behavior and preparation method thereof | |
| CN109678446A (en) | A kind of sludge curing agent and preparation method thereof | |
| CN105152340A (en) | Red mud phosphate-removing filling material for constructed wetland and preparation method thereof | |
| CN107321782A (en) | A kind of method that EDTA complexings ferrous ion activation calper calcium peroxide removes soil petrochina hydrocarbon | |
| CN108672482A (en) | One heavy metal species fixative and heavy-metal contaminated soil curing | |
| CN110436806A (en) | A kind of additive enhancing heavy metals immobilization effect and its application and application method | |
| CN111495958A (en) | Contaminated soil remediation method | |
| CN111377497B (en) | Sodium alginate-embedded iron carbon-medical stone efficient phosphorus removal particle and preparation method thereof | |
| CN109052656B (en) | Activated carbon powder-degrading bacterium composition and groundwater remediation technology | |
| WO2021143549A1 (en) | Harmless processing of sulfonated mud and drill cuttings dry solidified powder and preparation method thereof | |
| KR20230129255A (en) | Multifunctional blocker for coal mines and manufacturing method thereof | |
| CN111454012A (en) | Clean application of water-washed domestic garbage incineration fly ash in cement stabilized macadam mixture | |
| CN114085673B (en) | Prevention and control material for treating underground sewage and/or polluted soil as well as preparation method and application thereof | |
| CN108455934B (en) | Anaerobic bacterium self-healing crack concrete | |
| CN106315819A (en) | Oxidized slow release material for treating difficultly-degraded organic pollutants in underground water | |
| CN105645502B (en) | A kind of porous media material and preparation method thereof | |
| CN111911111B (en) | Hole sealing material for gas extraction and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |