Compound contaminated soil remediation agent and application method

A soil remediation agent and a technology for compound pollution, which are applied in the field of compound contaminated soil remediation agents and application to achieve the effects of simple ingredients, wide application range and no secondary pollution

Inactive Publication Date: 2017-06-13
HUATIAN ENG & TECH CORP MCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese Invention Patent (Patent No. 201510066429.5) invented a soil remediation agent composed of polymers and fillers, which is used to remediate contaminated soil with excessive Cr, Pb, and As. Chinese Invention Patent (Patent No. CN201110402052.8) invented a The remediation agent composed of persulfide and sulfate is applied to the remediation of agrochemical contaminated soil, and the Chinese invention patent (patent number CN201410323877.4) has invented a composite remediation mainly composed of persulfate and metal chelating agent It can be used for the treatment of organic matter and heavy metal pollution, but from the perspective of the composition of the agent, the restoration agent only uses the original single-function restoration agent in combination, and there is no substantial difference

Method used

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Effect test

Embodiment 1

[0016] The present embodiment is a compound polluted soil remediation agent, comprising a remediation agent and a soil conditioner; the weight of the remediation agent is divided into 70 to 90 parts, and the weight of the soil conditioner is divided into 10 to 30 parts; the remediation agent It also includes the following ingredients in parts by weight: 30-60 parts of modified biochar, and 20-40 parts of peroxide.

[0017] The modified biochar is modified sludge pyrolytic carbon prepared by adding iron-based flocculant or Fenton reagent to sludge conditioning, and the specific surface area of ​​the modified sludge pyrolytic carbon is 50-70g / m 2 , the sludge carbon particles of the modified sludge pyrolytic carbon are loaded with zero-valent iron reduced by iron ions or ferrous ions; the peroxide is calcium peroxide.

[0018] The soil conditioner includes humus and bentonite, and the mass ratio of the humus to the bentonite is 1:3˜1:8.

[0019] The preparation of the modified ...

Embodiment 2

[0028] The composite polluted soil remediation agent based on the above-mentioned embodiment, a kind of composite contaminated soil remediation agent, comprises remediation agent and soil conditioner; The weight of described remediation agent is divided into 70~90 parts, and the weight of described soil conditioner is divided into 10 parts ~30 parts; the restorative agent also includes the following ingredients in parts by weight: 30-60 parts of modified biochar, 20-40 parts of peroxide.

[0029] The preparation of the modified biochar comprises the following steps:

[0030] (1) Add iron-based flocculant to carbonaceous sludge;

[0031] (2) Under anaerobic conditions, iron ions or ferrous ions in the sludge are reduced and loaded on the sludge carbon particles in the form of zero-valent iron.

[0032] The soil conditioner includes humus and bentonite, and the mass ratio of the humus to the bentonite is 1:3˜1:8.

[0033] Dry the sludge after the iron-based flocculant until th...

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Abstract

The invention discloses a compound contaminated soil remediation agent, which comprises a remediation agent and a soil conditioner. An application method of the compound contaminated soil remediation agent comprises the following steps of (1) mixing the remediation agent with soil so as to cure the soil; (2) after finishing curing, applying the soil conditioner. Aiming at contaminated soil of a complex contaminated source, the compound contaminated soil remediation agent provided by the invention can be used for removing organic and heavy metal contaminants at the same time, and is simple in compositions, simple and convenient to operate, wide in application range, remarkable in effect, and free of secondary pollution at the same time.

Description

technical field [0001] The invention relates to a compound polluted soil remediation agent and an application method. Background technique [0002] As of 2014, there were about 150 million mu of polluted farmland in my country, and 50 million mu of moderately and severely polluted farmland. There were more than 500,000 seriously polluted sites left over from the relocation of industrial enterprises across the country. The problem of soil pollution is very serious, seriously affecting the safety of agricultural products and human health. With the rapid growth of my country's social economy, soil pollution shows a trend of expanding polluted area, increasing types of pollutants, becoming more complex types of pollution and gradually increasing pollution concentrations. The demand for soil remediation agents applied to complex pollution sources is increasing. [0003] The application of soil remediation agents is a key link in soil remediation. Generally speaking, soil remediat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K109/00
CPCC09K17/40B09C1/08B09C2101/00C09K2109/00
Inventor 夏溢王思佳王浩詹茂华程寒飞项萌李明
Owner HUATIAN ENG & TECH CORP MCC
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