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Preparation method of remediation agent for low-concentration single-type organic pollution

An organic pollution, low-concentration technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as the reduction of the ability of organic pollutants, and achieve the effects of excellent adsorption, excellent adsorption performance, and stable properties.

Inactive Publication Date: 2015-12-23
江苏绿田环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the ability of natural clay minerals to absorb organic pollutants in the environment is reduced due to the formation of a hydration layer during the weathering process, and to provide a preparation method for a low-concentration single-type organic pollution remediation agent

Method used

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  • Preparation method of remediation agent for low-concentration single-type organic pollution
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  • Preparation method of remediation agent for low-concentration single-type organic pollution

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Embodiment 1

[0027] A preparation method of a low-concentration single-type organic pollution remediation agent, comprising the following steps:

[0028] a. Preparation of sodium bentonite

[0029] Add natural bentonite to excess sodium chloride solution, stir magnetically at room temperature for 24 hours, and centrifuge the solid and liquid, then rinse the bentonite with deionized water equal in volume to the sodium chloride solution for 3 consecutive times;

[0030] b. Optimization of sodium bentonite

[0031] Adding deionized water equal to the volume of the sodium chloride solution in step a to the sodium bentonite obtained in step a, separating and removing bentonite with a particle size > 2 μm by wet sedimentation, centrifuging the upper suspension and removing the supernatant, Obtain sodium bentonite with optimized particle size ≤ 2 μm;

[0032] c. Modification of sodium bentonite

[0033] Add excess tetrapropylammonium bromide solution to the sodium bentonite obtained in step b,...

Embodiment 2

[0037] A preparation method of a low-concentration single-type organic pollution remediation agent, comprising the following steps:

[0038] a. Preparation of sodium bentonite

[0039] Add natural bentonite to excess sodium chloride solution, stir mechanically at room temperature for 48 hours, and after solid-liquid centrifugation, rinse bentonite with deionized water equal to the volume of sodium chloride solution for 5 consecutive times;

[0040] b. Optimization of sodium bentonite

[0041] Adding deionized water equal to the volume of the sodium chloride solution in step a to the sodium bentonite obtained in step a, separating and removing bentonite with a particle size > 2 μm by wet sedimentation, centrifuging the upper suspension and removing the supernatant, Obtain sodium bentonite with optimized particle size ≤ 2 μm;

[0042] c. Modification of sodium bentonite

[0043] Add excess tetraethylammonium bromide solution to the sodium bentonite obtained in step b, mechani...

Embodiment 3

[0047] A preparation method of a low-concentration single-type organic pollution remediation agent, comprising the following steps:

[0048] a. Preparation of sodium bentonite

[0049] Add natural bentonite to excess sodium chloride solution, mechanically stir at room temperature for at least 36 hours, and after solid-liquid centrifugation, wash the bentonite with deionized water equal to the volume of sodium chloride solution, at least 4 times in a row;

[0050] b. Optimization of sodium bentonite

[0051] Adding deionized water equal to the volume of the sodium chloride solution in step a to the sodium bentonite obtained in step a, separating and removing bentonite with a particle size > 2 μm by wet sedimentation, centrifuging the upper suspension and removing the supernatant, Obtain sodium bentonite with optimized particle size ≤ 2 μm;

[0052] c. Modification of sodium bentonite

[0053] Add excess tetramethylammonium bromide solution to the sodium bentonite obtained in s...

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Abstract

The invention provides a preparation method of a remediation agent for low-concentration single-type organic pollution. The preparation method comprises the following steps: preparation of sodium bentonite, optimization of the sodium bentonite, modification of the sodium bentonite through excessive low-molecular-weight quaternary ammonium bromide solutions as well as forming of the modified bentonite. The preparation method of the remediation agent for the low-concentration single-type organic pollution is simple and economical; the prepared remediation agent has excellent adsorbability on neutral organic matters especially aromatic organic matters, further has the advantages of reliable adsorption, stable properties, environment friendliness and higher practical values, and is particularly applicable to governance and remediation of low-concentration single-type organic pollution such as remediation and governance of mild organic pollution soil or native water.

Description

technical field [0001] The invention belongs to the field of organic pollution environment restoration, and in particular relates to a preparation method of a low-concentration single-type organic pollution restoration agent. Background technique [0002] The production and living activities of the social economy will cause the production and discharge of pollutants to varying degrees, causing harm and burden to the ecological environment. At present, the situation of organic pollution nationwide is still very serious, and organic pollution covers almost all environmental media. The National Soil Pollution Survey Announcement issued by the Ministry of Land and Resources and the Ministry of Environmental Protection on April 17, 2014 shows that 16.1% of the country’s soil has been polluted to varying degrees, and the organic pollutants are mainly organochlorine pesticides and polycyclic aromatic hydrocarbons; although The state stipulates that the production wastewater contai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30
Inventor 袁晋李彦俊何岸飞盛光遥贺明华魏诗辉林东海
Owner 江苏绿田环保科技有限公司
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