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Preparation method of fly ash chitosan composite adsorbent for treating printing and dyeing wastewater

A composite adsorption, printing and dyeing wastewater technology, applied in water/sewage treatment, chemical instruments and methods, textile industry wastewater treatment, etc., can solve problems such as poor biodegradability

Inactive Publication Date: 2016-10-05
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When starch slurry is used, both BOD and COD are high, and the biodegradability is good; when synthetic slurry is used, COD is very high, BOD is less than 5mg / L, and water biodegradability is poor

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  • Preparation method of fly ash chitosan composite adsorbent for treating printing and dyeing wastewater
  • Preparation method of fly ash chitosan composite adsorbent for treating printing and dyeing wastewater
  • Preparation method of fly ash chitosan composite adsorbent for treating printing and dyeing wastewater

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Embodiment Construction

[0031] A method for preparing a fly ash chitosan composite adsorbent for treating printing and dyeing wastewater, comprising the following process steps:

[0032] a. Pass the bottom fly ash through a 300-mesh sieve for later use;

[0033] b. Take 5.0000g spare bottom fly ash, mix with 2mol / L NaOH solution and 1mol / L NaOH 2 CO 3 The mixed solution of the solution or the 2mol / L NaOH solution alone is mixed according to the solid-to-liquid ratio of 1:10, then ultrasonically treated at room temperature for 2 hours, the mixed solution after ultrasonic treatment is washed to neutral, suction filtered, and dried at 80°C for later use , to prepare mixed alkali-modified fly ash;

[0034]c. Take 2.0000g of mixed alkali-modified fly ash, mix fly ash and chitosan at a mass ratio of 1:10, add 20ml of chitosan acetic acid solution after mixing, first stir the mixed solution for 30min quickly, and at the same time use 2mol / LNaOH solution was titrated to pH=9, and then stirred slowly for ...

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Abstract

The invention discloses a preparation method of a fly ash chitosan composite adsorbent for treating printing and dyeing wastewater, which can be widely applicable to treatment of industrial wastewater and other wastewater containing active bright red X-3B. One raw material of the technology is wide in source and low in price; and a method for treating the wastewater containing the active bright red X-3B is simple, high in treatment efficiency and low in cost. An adsorption material for treating the wastewater containing the active bright red X-3B is modified fly ash and is modified by chitosan; and a modification method is simple and the cost is low. By adopting the research method, the use amount of the chitosan can be saved and the cost is reduced; and the fly ash can be modified and the adsorption performance of the fly ash is improved so that the aim of utilizing wastes is realized; and an environmental protection value is very high.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing wastewater treatment, and relates to a preparation method of a fly ash chitosan composite adsorbent for treating printing and dyeing wastewater, which can be widely used in the treatment of industrial and other printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Printing and dyeing wastewater has a large amount of water, 100-200 tons of water is consumed per ton of textile printing and dyeing, and 80-90% of it becomes wastewater. Textile printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, high alkalinity, and large changes in water quality. It is one of the most difficult industrial wastewater to treat. Impurities, sand substances, inorganic salts,...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F103/30
CPCB01J20/24C02F1/286C02F2103/30
Inventor 王庆平刘佳丽张晴晴闵凡飞
Owner ANHUI UNIV OF SCI & TECH
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