Preparation method for high-concentration compound organic pollution restoration agent

An organic pollution and composite technology, which is applied in the restoration of polluted soil, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve problems such as the reduction of organic pollutant capacity, achieve excellent adsorption performance, and the preparation method is simple and economical. , Reliable adsorption effect

Inactive Publication Date: 2015-12-09
宜兴市环境监测站
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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 high-concentration composite organic pollution repair agent

Method used

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  • Preparation method for high-concentration compound organic pollution restoration agent
  • Preparation method for high-concentration compound organic pollution restoration agent
  • Preparation method for high-concentration compound organic pollution restoration agent

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of a high-concentration composite 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 12 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 tetrabutylammonium bromide solution to the sodium bentonite obtained in step b, s...

Embodiment 2

[0037] A preparation method of a high-concentration composite 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 36 hours, centrifuge the solid and liquid, and wash the 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 tetrapentylammonium bromide solution to the sodium bentonite obtained in step b, mechan...

Embodiment 3

[0047]A preparation method of a high-concentration composite 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 24 hours, and after solid-liquid centrifugation, wash 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, adding excessive tetrahexyl ammonium bromide solution to the sodium bentonite obtained in step b, ...

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Abstract

The invention provides a preparation method for a high-concentration compound organic pollution restoration agent. The preparation method includes the steps of preparing, optimizing and modifying sodium-type bentonite and forming modified bentonite. The preparation method is simple and economical, the prepared restoration agent has outstanding performance of adsorbing various organic pollutants and particularly existing high-concentration organic pollutants, is reliable in adsorption, stable in nature and environmentally friendly and is an economical high-practicability restoration agent. The restoration agent is particularly suitable for treating and restoring high-concentration compound organic pollution, for example, severe organic pollution soil, organic waste water and refuse landfill organic leachate.

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 high-concentration composite 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 across the country is still very serious, and organic pollution covers 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 suffered from Different degrees of pollution, the organic pollutants are mainly organochlorine pesticides and polycyclic aromatic hydrocarbons; although the state stipulates that production wastewater con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28B09C1/00
Inventor 王大春薛苗陈忠谢卫平
Owner 宜兴市环境监测站
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