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Persulfate composite solution for regeneration of phenol adsorption saturated activated carbon and preparation method and application thereof

A compound solution and preparation method technology, which is applied in the direction of chemical instruments and methods, separation methods, filter regeneration, etc., can solve the problems of high loss, large loss of activated carbon, incomplete regeneration, etc., and achieve extensive economic benefits and application prospects. Simple, less polluting effect

Inactive Publication Date: 2013-08-14
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few successful reports on the biological regeneration of activated carbon. The main disadvantage is that the biological method is only suitable for biodegradable pollutants, but not for non-biodegradable and toxic and harmful organic substances, and the residual final product is adsorbed. On the surface of activated carbon, the regeneration is incomplete; the high-temperature heating regeneration method has a huge loss of activated carbon, usually more than 10%, and the transportation cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The wastewater discharged by a phenol production enterprise contains phenol concentration of 600-42000mg / L. The wastewater treatment process adopted is to firstly dilute the wastewater to reduce the phenol content to about 500mg / L, and remove the phenol in the wastewater by simple precipitation. Suspended particles, after the process, the phenol content can be reduced to about 300-350mg / L. At this time, the wastewater enters the activated carbon filter for adsorption treatment. In the initial use, the removal rate of activated carbon for phenol can reach 90-95%, and the phenol content is further reduced to 15-30mg / L. After 12 months of use, the adsorption efficiency of activated carbon for phenol has been reduced to about 40%, and the phenol content in the effluent is 180-200mg / L. The regeneration treatment experiment of this activated carbon was carried out.

[0026] Take an appropriate amount of phenol-adsorbed saturated activated carbon and put it into the regeneratio...

Embodiment 2

[0029] A chemical company adopts activated carbon filtration process as advanced sewage treatment process. After one year of sewage operation, the adsorption efficiency of activated carbon for phenol is significantly reduced, and the removal rate of phenol is reduced from about 65% in the initial state to 7%. The chemical company uses phenol as the raw material for the manufacture of cumene. The workshop production wastewater and sewage treatment adopts the secondary treatment of hydrolytic acidification aerobic process and the tertiary treatment of activated carbon adsorption. The COD of the secondary treatment water is 240-360mg / L, of which the phenol content is about 10% of the COD. After being adsorbed by activated carbon, the phenol concentration of the initial treatment water is 8-13mg / L. After the activated carbon adsorption efficiency is reduced, the phenol concentration increases to 50mg / L, so the regeneration test of phenol-saturated activated carbon was carried out ...

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Abstract

The invention belongs to the technical field of environment friendliness and in particular relates to a persulfate composite solution for regeneration of phenol adsorption saturated activated carbon and a preparation method and application thereof. The preparation method comprises the following steps: adding a proper amount of sodium bicarbonate and sodium hydroxide into the persulfate stock solution to obtain a persulfate composite solution; and activating by using a ferrous chloride solution, wherein the persulfate composite solution generates sulfate ion (S2O82-) and high-strength sulfate radical (.SO42-) through molecular oxidation or chemical activation, and the activated product can rapidly decompose the phenol adsorption saturated activated carbon. The prepared persulfate composite solution is used for regenerating activated carbon for drinking water plants or industrial enterprises where the activated carbon is used for purifying water, and the persulfate composite solution is low in cost and simple in process, hardly causes pollution and has wide economic benefits and application prospects.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a sodium persulfate composite solution used for regeneration of phenol-adsorbed saturated activated carbon, and a preparation method and application thereof. Background technique [0002] Under the background of the continuous increase of water pollution at home and abroad, activated carbon, as a high-efficiency adsorption material, has been widely used in the advanced treatment process of drinking water. Activated carbon can effectively remove a variety of different organic pollutants from water, but after long-term use, activated carbon continues to reach the state of organic matter adsorption saturation, and needs to be replaced or regenerated in time to ensure the water treatment effect. Activated carbon regeneration methods have been researched and applied at home and abroad. It is mainly divided into three categories: biological method, heating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/20
Inventor 安东
Owner FUDAN UNIV
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