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Recycling method of organic bentonite for organic wastewater treatment

A technology of organic wastewater treatment and bentonite, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of pollutant transfer and other issues, and achieve the effects of simple process, reduced investment in wastewater treatment, and low energy consumption

Active Publication Date: 2014-08-13
无锡智慧兴宜信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a method for recycling organic bentonite, which can solve the problem of pollutant transfer after organic bentonite adsorption and treatment of organic waste water, and reuse bentonite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Put the organic bentonite adsorbed with phenol into a DC electrolytic cell, add toluene, the mass ratio of toluene and waste organic bentonite is 1:0.8, add a small amount of sodium chloride solution with a concentration of 20g / L, the amount of sodium chloride solution is One-twentieth of the amount of toluene, connect the two poles of the electrolytic cell with direct current, the potential gradient is 1V / cm, and electrolyze for 8 hours. During the electrolysis, the mixture in the electrolytic cell is stirred at a speed of 200 rpm. After the electrolysis is completed, stop Stirring, precipitation and separation, in this process, the organic matter and surfactant enter the toluene organic phase under the driving action of the electric field and the distribution of the organic solution, and the cationic position in the bentonite is replaced by sodium in the sodium chloride solution, Obtain bentonite solid; the liquid obtained after separating bentonite, after distillation...

Embodiment 2

[0019] Put the organic bentonite adsorbed with nitrophenol into a DC electrolytic cell, add toluene, the mass ratio of toluene and waste organic bentonite is 1:0.1, add a small amount of sodium chloride solution with a concentration of 10g / L, and the sodium chloride solution The amount is one-tenth to one-twentieth of the amount of toluene, and the two poles of the electrolytic cell are connected with direct current, the potential gradient is 0.5V / cm, and the electrolysis is performed for 5 hours. During the electrolysis, the mixture in the electrolytic cell is 150 rpm After the electrolysis is completed, the stirring is stopped and the precipitation is separated. During this process, the organic matter and surfactant enter the toluene organic phase under the driving action of the electric field and the distribution of the organic solution, and the cationic position in the bentonite is chlorinated The sodium in the sodium solution is replaced to obtain the bentonite solid; the ...

Embodiment 3

[0022] Put the organic bentonite adsorbed with p-nitrotoluene into a DC electrolytic cell, add toluene, the mass ratio of toluene and waste organic bentonite is 1:0.6, add a small amount of sodium chloride solution with a concentration of 15g / L, sodium chloride solution The amount of toluene is one-fifteenth of the amount of toluene, direct current is applied to the two poles of the electrolytic cell, the potential gradient is 1V / cm, and the electrolysis is performed for 6 h. During electrolysis, the mixture in the electrolytic cell is stirred at a speed of 180 rpm, and the electrolysis is completed Finally, stop stirring, and precipitate and separate. In this process, the organic matter and surfactant enter the toluene organic phase under the driving action of the electric field and the distribution of the organic solution, and the cationic position in the bentonite is formed by the sodium in the sodium chloride solution. Substituted to obtain bentonite solid; the liquid obtai...

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PUM

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Abstract

The invention discloses a recycling method of organic bentonite for organic wastewater treatment. The method comprises the steps of: putting the waste organic bentonite which adsorbs organic pollutants into a DC (Direct Current) electrolytic bath; adding methylbenzene, wherein the mass ratio of the methylbenzene to the waste organic bentonite is (1:0.1)-(1:0.8); adding a 10-20g / L sodium chloride solution, wherein the amount of the sodium chloride solution is 1 / 10-1 / 20 of that of the methylbenzene; applying direct current to the two poles of the electrolytic bath with electric potential gradient being 0.5-1V / cm; electrolyzing for 5-8 hours; stirring the mixture in the electrolytic bath at the rotation speed of 150-200 revolutions per minute during electroanalysis; carrying out precipitation and separation after the electroanalysis to obtain bentonite solid; distilling and condensing a liquid obtained after the separation of the bentonite solid to obtain methylbenzene and other organic matters; and applying electrode action on the organic bentonite to obtain the bentonite which can be used repeatedly. Wastewater treatment investment and secondary pollution caused by adsorption are reduced.

Description

technical field [0001] The invention relates to the development technology of environmental protection materials, in particular to a method for recycling organic bentonite. Background technique [0002] Bentonite is a clay rock mainly composed of montmorillonite, and it is one of the most widely used non-metallic minerals. The structural feature of montmorillonite is a hydrous layered aluminosilicate mineral, which is composed of two silicon-oxygen tetrahedrons sandwiching an aluminum (magnesium) oxygen (oxygen) octahedron, belonging to the 2:1 type three-layer Clay minerals. The distance between the crystal layers is 0.96-2.14nm. These nano-sheets are stacked together to form clay particles of several hundred nanometers to several microns, and there are exchangeable cations between the bentonite layers. [0003] Organobentonite is an organic bentonite that replaces the interlayer exchangeable cations in montmorillonite with organic cations (organic ammonium salts, quatern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34B01J20/22
Inventor 马建锋杨彦姚超李定龙
Owner 无锡智慧兴宜信息技术有限公司
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