CN103639193B - Restoration method for organically polluted site soil through circular in-situ chemical oxidation - Google Patents
Restoration method for organically polluted site soil through circular in-situ chemical oxidation Download PDFInfo
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- CN103639193B CN103639193B CN201310726345.0A CN201310726345A CN103639193B CN 103639193 B CN103639193 B CN 103639193B CN 201310726345 A CN201310726345 A CN 201310726345A CN 103639193 B CN103639193 B CN 103639193B
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Abstract
The invention discloses a restoration method for organically polluted site soil through circular in-situ chemical oxidation. The restoration method comprises the steps: soaking soil into an oxidation reaction tank to carry out advanced treatment, and meanwhile, building a separation wall on a fracture surface, wherein the soil is dug on the surface layer of the ground in a polluted region, and the fracture surface is formed after digging; then, injecting a repairing reagent to a central point of the polluted region by using a flexible permeable pipe; next, extracting, and checking whether the reaction is complete. Due to the adoption of the technical scheme, equipment is designed to be automatic so as to be convenient to operate; complex treatment equipment is not needed, so that the cost is low; the application range can be adjusted according to the size of the polluted site, so that the restoration method is widely applied.
Description
Technical field
The present invention relates to technical field of soil remediation, in particular to the circulation in situ chemical oxidation method of reducing of a kind of organic contamination place soil.
Background technology
Along with the fast development of China's economy, the quickening of urbanization, process of industrialization,, there is large quantities of closedown resettlement in recent years or by retired chemical enterprise in the particularly appearance of city layout and industry restructuring and the policy such as " move back two and enter three ", " Tui Chengjin garden ".Chemical enterprise causes quite serious contaminated sites problem due to " run, drip, leak " etc. of chemicals in chemical process.Because chemical enterprise focuses mostly in city, current most of contaminated site is faced with conversion and the secondary development of land use, the contaminated soil in these places is called as " palm fibre ground ", " poison ground ", " Chemical Time Bomb " etc., serious threat health and Environmental security, become current soil environment problem in the urgent need to address.
China's chemical industry contaminated sites shows the modern environment contamination characteristics that multi-source, compound, amount are large, wide, lasting, poison.Pollutant of a great variety, distinct, and many substance toxicity are strong, to ecological environment and human health risk very big.Such as, the organo-chlorine pesticide such as DDT, BHC, Niran, mirex that organic agricultural chemicals is produced is all persistence organic pollutants, has hypertoxicity, bioaccumulation, biological magnification and " three cause " (carcinogenic, teratogenesis and mutagenesis) effect; Organic chemical industry produce nitro compound (as nitrophenols, nitrobenzene etc.) be important environmental pollutants, can exist lastingly in the environment, and can in food chain bio-accumulation.Various pollutants in contaminated site can be worked the mischief to ecological environment and human health by different approaches.Volatility and half volatile organic contaminant by transition processes such as volatilization, diffusions, can cause the pollution to air, and jeopardize health by biological accumulation and Process of food-chain.Therefore, be badly in need of implementing soil remediation engineering to these organic contamination places.
Soil remediation makes to suffer contaminated soil to recover the technical measures of normal function.At present, the kind of the soil restoring technology developed in the world is a lot, original position and showering is divided into by disposal place, showering relates to shoveling and muck haulage, destroy native soil structure, is difficult to process and pollutes darker region, and running cost is high, in the world gradually replace by based technique for in-situ remediation.Different according to employing method and principle, contaminated soil remediation technology can be divided into peripheral doses, chemical redemption and biological prosthetic.Wherein, chemical remediation technology comprises chemical leaching technology, electronation and reduction dechlorination recovery technique, chemical oxidation recovery technique, extraction technology and soil function and improves recovery technique etc.Because peripheral doses is normally by pollutant transfer or fixing, has and repair halfway shortcoming; And biological prostheticly usually needing the long period (3-10), chemical remediation technology has repair time short (2-4 month), the advantage such as thorough of degrading, and therefore chemical redemption is applied in the reparation of contaminated site more and more.
Summary of the invention
The object of this invention is to provide the circulation in situ chemical oxidation method of reducing of a kind of organic contamination place soil.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A circulation in situ chemical oxidation method of reducing for organic contamination place soil, comprises the following steps:
Step 1), by the soil of the top layer, ground of 10*10 rice in contaminated area excavation 0.5-1 rice, is immersed in oxidation reaction pond and is carried out advanced treating; The section simultaneously formed after excavation builds divider wall by laying bricks or stones, ensures the vertical seepage of drip washing reagent, and avoid horizontal proliferation;
Step 2) at four angles of contaminated area, the position on distance about 1 meter, border, utilizes 30 rig vertical perforatings respectively, 1 meter, aperture, the degree of depth 18 meters, then inserts the permeability flexible pipe of caliber 600 in 4 holes, length 18 meters, reach the bottommost of boring, then in the center position of contaminated area, separately about 1.5 meters, an aperture is made a call to, the degree of depth 20 meters, then the permeability flexible pipe of caliber 1000 is inserted, length 20 meters;
Step 3) places 2 large water tanks on ground near contaminated area, chemical oxidizing agent and surfactant is put in water tank I, after adding catalyst generation oxygen radical, imported in the decanting point at 4 angles by water pump, soil pollutant is fully contacted with oxidant, every day, timing added 2-3 time, and controlled each addition by flowmeter;
The reagent of step 4) after reaction or the fluid contaminants of non-complete reaction, by extraction pump, the liquid produced in extracting point is pumped into large water tank II, analyze after testing, confirm whether it fully reacts, or whether also have residual contaminants, adjust the reagent injection rate of decanting point; After its abundant reaction detection is pollution-free, extract is carried out precipitate, filter, then add large water tank I, recycle;
After the major pollutants process such as step 5) complete, change the oxidant in water tank I into nutrient solution containing oil degradation bacteria, utilize microorganism to remove remaining organic matter in soil, new construction soil microbial community system of laying equal stress on, makes soil recover environmental health gradually.
The invention has the beneficial effects as follows:
Adopt technical solution of the present invention, equipment automatization designs, easy to operate; Without the need to the treatment facility of complexity, cost is low; The scope of application can regulate according to the size of contaminated site, is widely used.
Detailed description of the invention
Below in conjunction with embodiment, describe the present invention in detail.
A circulation in situ chemical oxidation method of reducing for organic contamination place soil, comprises the following steps:
Step 1), by the soil of the top layer, ground of 10*10 rice in contaminated area excavation 0.5-1 rice, is immersed in oxidation reaction pond and is carried out advanced treating; The section simultaneously formed after excavation builds divider wall by laying bricks or stones, ensures the vertical seepage of drip washing reagent, and avoid horizontal proliferation;
Step 2) at four angles of contaminated area, the position on distance about 1 meter, border, utilizes 30 rig vertical perforatings respectively, 1 meter, aperture, the degree of depth 18 meters, then inserts the permeability flexible pipe of caliber 600 in 4 holes, length 18 meters, reach the bottommost of boring, then in the center position of contaminated area, separately about 1.5 meters, an aperture is made a call to, the degree of depth 20 meters, then the permeability flexible pipe of caliber 1000 is inserted, length 20 meters;
Step 3) places 2 large water tanks on ground near contaminated area, chemical oxidizing agent and surfactant is put in water tank I, after adding catalyst generation oxygen radical, imported in the decanting point at 4 angles by water pump, soil pollutant is fully contacted with oxidant, every day, timing added 2-3 time, and controlled each addition by flowmeter;
The reagent of step 4) after reaction or the fluid contaminants of non-complete reaction, by extraction pump, the liquid produced in extracting point is pumped into large water tank II, analyze after testing, confirm whether it fully reacts, or whether also have residual contaminants, adjust the reagent injection rate of decanting point; After its abundant reaction detection is pollution-free, extract is carried out precipitate, filter, then add large water tank I, recycle;
After the major pollutants process such as step 5) complete, change the oxidant in water tank I into nutrient solution containing oil degradation bacteria, utilize microorganism to remove remaining organic matter in soil, new construction soil microbial community system of laying equal stress on, makes soil recover environmental health gradually.
Claims (1)
1. a circulation in situ chemical oxidation method of reducing for organic contamination place soil, is characterized in that: comprise the following steps:
Step 1), by the soil of the top layer, ground of 10*10 rice in contaminated area excavation 0.5-1 rice, is immersed in oxidation reaction pond and is carried out advanced treating; The section simultaneously formed after excavation builds divider wall by laying bricks or stones, ensures the vertical seepage of drip washing reagent, and avoid horizontal proliferation;
Step 2) at four angles of contaminated area, the position on distance about 1 meter, border, utilizes 30 rig vertical perforatings respectively, 1 meter, aperture, the degree of depth 18 meters, then inserts the permeability flexible pipe of caliber 600 in 4 holes, length 18 meters, reach the bottommost of boring, then in the center position of contaminated area, separately about 1.5 meters, an aperture is made a call to, the degree of depth 20 meters, then the permeability flexible pipe of caliber 1000 is inserted, length 20 meters;
Step 3) places 2 large water tanks on ground near contaminated area, chemical oxidizing agent and surfactant is put in water tank I, after adding catalyst generation oxygen radical, imported in the decanting point at 4 angles by water pump, soil pollutant is fully contacted with oxidant, every day, timing added 2-3 time, and controlled each addition by flowmeter;
The reagent of step 4) after reaction or the fluid contaminants of non-complete reaction, by extraction pump, the liquid produced in extracting point is pumped into large water tank II, analyze after testing, confirm whether it fully reacts, or whether also have residual contaminants, adjust the reagent injection rate of decanting point; After its abundant reaction detection is pollution-free, extract is carried out precipitate, filter, then add large water tank I, recycle; After the major pollutants process such as step 5) complete, change the oxidant in water tank I into nutrient solution containing oil degradation bacteria, utilize microorganism to remove remaining organic matter in soil, new construction soil microbial community system of laying equal stress on, makes soil recover environmental health gradually.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104259195A (en) * | 2014-09-29 | 2015-01-07 | 镇江华域环保设备制造有限公司 | Contaminated soil repair method |
| CN104624634B (en) * | 2015-03-12 | 2016-03-02 | 南京科盛环保技术有限公司 | A kind of chemical oxidation restorative procedure of organic polluted soil |
| CN105149335B (en) * | 2015-06-24 | 2019-01-04 | 武汉都市环保工程技术股份有限公司 | The in situ chemical oxidation repairing construction engineering method of organic polluted soil |
| CN108064191B (en) * | 2015-09-05 | 2021-07-27 | 特尔姆（鼎科）环境公司 | Remediation of contaminated soil and water using improved activators |
| CN105521990B (en) * | 2016-01-28 | 2018-12-25 | 浙江博世华环保科技有限公司 | The in-situ remediation system and restorative procedure in a kind of LNAPLs organic contamination place |
| CN105935684A (en) * | 2016-06-23 | 2016-09-14 | 大连德联投资控股有限公司 | Integrated soil reusing and repairing system of waste landfill site and working method thereof |
| CN107214189A (en) * | 2017-07-19 | 2017-09-29 | 河北煜环环保科技有限公司 | A kind of organic material contaminated soil renovation technique |
| CN108435786A (en) * | 2018-05-07 | 2018-08-24 | 句容宇发农业发展有限公司 | A method of repairing pesticide contaminated soil |
| CN108746171A (en) * | 2018-08-14 | 2018-11-06 | 森特士兴集团股份有限公司 | A kind of contaminated site Ex-situ remediation method and its system based on cellular excavation |
| CN108746195A (en) * | 2018-09-12 | 2018-11-06 | 东北林业大学 | Elution is with oxidative degradation in the prosthetic device and method of the organic polluted soil of one |
| CN111847811B (en) * | 2019-04-25 | 2022-12-23 | 中国科学院生态环境研究中心 | Oil field tank bottom oil sludge treatment method |
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| JP3178581B2 (en) * | 1995-08-04 | 2001-06-18 | 株式会社大林組 | How to clean contaminated soil |
| JP2003285045A (en) * | 2002-03-28 | 2003-10-07 | Fuji Giken Kk | Method for cleaning polluted soil |
| CN101745525A (en) * | 2008-12-04 | 2010-06-23 | 佳木斯大学 | Carbamide peroxide used for in-situ restoration of organic pollution of soil |
| CN101773928B (en) * | 2009-12-31 | 2011-09-07 | 东南大学 | In-situ solidification and segregation treatment method of heavy-metal industrial polluted field |
| CN102228900B (en) * | 2011-05-18 | 2013-06-12 | 华北电力大学 | In situ integrated restoring system and method of petroleum polluted soil |
| CN102513345B (en) * | 2012-01-13 | 2013-07-24 | 苏州市环境科学研究所 | Method for treating organic polluted soil |
| CN103230933B (en) * | 2013-04-11 | 2014-12-31 | 华北电力大学 | A device for remediation of organic contaminated soil by using thermal desorption combined with an oxidant and a remediation method |
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Address after: Zhujiang Road Wuzhong District Mudu town of Suzhou city in Jiangsu province 215000 No. 999 building 3 room A305 Patentee after: JIANGSU GAIYA ENVIRONMENTAL SCIENCE AND TECHNOLOGY CO., LTD. Address before: Zhujiang Road Wuzhong District Mudu town of Suzhou city in Jiangsu province 215000 No. 999 building 3 room A305 Patentee before: JIANGSU GAIYA ENVIRONMENTAL ENGINEERING CO., LTD. |
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Effective date of registration: 20181101 Address after: 510000 Guangzhou, Guangzhou, Guangdong economic and Technological Development Zone, Science City, Cai Fang Road, room 11, A503. Patentee after: Guangzhou times Environmental Management Co., Ltd. Address before: 215000 A305 3, 999 Pearl River Road, Wuzhong District, Suzhou, Jiangsu. Patentee before: JIANGSU GAIYA ENVIRONMENTAL SCIENCE AND TECHNOLOGY CO., LTD. |
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