Regeneration method of composite adsorbent for adsorbing electronegative substances

A composite adsorption and electronegativity technology, applied in separation methods, filter regeneration, filtration separation, etc., can solve the problems of cumbersome adsorbent regeneration methods, difficult process control, low adsorption capacity, etc., and achieve excellent regeneration performance and easy control. , the effect of large adsorption capacity

Inactive Publication Date: 2020-02-18
绍兴谓钢建材有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the shortcomings of the application of conductive polymers as adsorbents are that, first, their adsorption capacity is low; The problem
The regeneration methods of the adsorbent in the above-mentioned patents are all relatively complicated, and the process is difficult to control

Method used

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  • Regeneration method of composite adsorbent for adsorbing electronegative substances
  • Regeneration method of composite adsorbent for adsorbing electronegative substances

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Experimental program
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Effect test

Embodiment 1

[0047] The composite adsorbent material contains conductive polymer polypyrrole, metal oxide titanium dioxide and coupling agent formic acid. The ratio of the three substances is titanium dioxide:polypyrrole:formic acid=10:100:0.1. The specific synthesis steps are as follows: First, at room temperature, add 0.1 part of formic acid to 1000 parts of water and stir to dissolve, then disperse 1.0 part of titanium dioxide in the above solution, stir for 1 hour, then add 100 parts of polypyrrole, stir at room temperature for 8-12 hours, filter, After the obtained solid was washed with a large amount of water, it was dried at 50° C. for 12 hours to obtain a composite adsorbent of titanium dioxide: polypyrrole: formic acid = 10:100:0.1.

Embodiment 2

[0049] The composite adsorbent material contains conductive polymer polypyrrole, metal oxide manganese dioxide and coupling agent oxalic acid. The ratio of the three substances is manganese dioxide:polypyrrole:oxalic acid=50:100:1.0. The specific synthesis steps are as follows: firstly, at room temperature, add 1.0 parts of oxalic acid to 1000 parts of water and stir to dissolve, then disperse 50 parts of manganese dioxide in the above solution, stir for 1 hour, then add 100 parts of polypyrrole, and stir at 30 ° C for 8 After ~12h, filter, the obtained solid was washed with a large amount of water, and then dried at 50°C for 12h to obtain a composite adsorbent of manganese dioxide:polypyrrole:oxalic acid=50:100:1.0.

Embodiment 3

[0051]The composite adsorbent material contains conductive polymer polypyrrole, metal oxide ferric oxide and coupling agent hexanoic acid. The ratio of the three substances is ferric oxide:polypyrrole:hexanoic acid=80:100:2.0. The specific synthesis steps are as follows: First, at room temperature, add 2.0 parts of caproic acid to 1000 parts of water and stir to dissolve, then disperse 80 parts of ferric oxide in the above solution, then add 100 parts of polypyrrole, stir at room temperature for 8-12 hours, filter , the obtained solid was washed with a large amount of water, and dried at 50° C. for 12 hours to obtain a composite adsorbent of ferric oxide: polypyrrole: hexanoic acid = 80:100:2.0.

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Abstract

The invention relates to a regeneration method of a composite adsorbent for adsorbing electronegative substances. The generation method comprises the following steps: (1) soaking a used composite adsorbent in an alkali solution with a concentration of 0.01-15 mol*L<-1> for 1-120min; (2) performing first solid-liquid separation; (3) soaking the separated solid in an acid solution with a concentration of 0.01-15 mol*L<-1> for 1-120min; and (4) performing second solid-liquid separation to obtain the regenerated composite adsorbent, wherein the weight ratio of the acid solution to the adsorbent and the weight ratio of the alkali solution to the adsorbent are both in a range of (0.5:1)-(100:1). The composite adsorbent provided by the invention has excellent regeneration performance, adsorptionperformance of the regenerated adsorbent is almost free from loss, and the composite adsorbent still has good adsorption performance after regeneration for a plurality of times. The regeneration method is simple to operate, is easy to control and is suitable for large-scale industrial production and applications.

Description

technical field [0001] The present application relates to a regeneration method for a composite adsorbent for adsorbing electronegative substances, in particular to a regeneration method for a metal oxide / conductive polymer composite adsorbent, which is applicable to the technical field of wastewater treatment. Background technique [0002] In recent years, my country produces about 70 billion cubic meters of various waste water every year. Although some of these wastewaters have been treated, the wastewater still contains a certain degree of organic pollutants and inorganic substances, which are manifested by high concentrations of COD and BOD, high chroma, nutrients (total phosphorus and total nitrogen, etc.) and heavy metal ions ( Such as lead ions, copper ions, antimony ions, zinc ions, etc.) high problems. Moreover, wastewater generally contains multiple pollutants or multiple heavy metal ions at the same time, and wastewater containing only one pollutant is basically ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34
CPCB01J20/3475
Inventor 延卫冯江涛李晶晶王宁陈杰王嘉楠杨国锐
Owner 绍兴谓钢建材有限责任公司
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