Adsorbent for treatment of dye wastewater and printing-dyeing wastewater and preparation method thereof

Abstract

The invention discloses an adsorbent for treatment of dye wastewater and printing-dyeing wastewater and a preparation method thereof. The adsorbent is characterized by being prepared through the following steps: respectively crushing powdered active carbon, crosslinked cationic starch and crosslinked cationic polyvinyl alcohol microspheres, and respectively carrying out sieving; mixing sieved active carbon with sieved crosslinked cationic starch, or mixing the sieved active carbon with sieved crosslinked cationic polyvinyl alcohol, or mixing the sieved active carbon with the sieved crosslinkedcationic starch and sieved cross-linked cationic polyvinyl alcohol microspheres so as to obtain the adsorbent for treatment of the dye wastewater and the printing-dyeing wastewater. Adsorption decolorization experiment results show that the adsorbent for treatment of the dye wastewater and the printing-dyeing wastewater provided by the invention can be used as a fixed-bed adsorbent, has high adsorption removal ability for organic dyes in the dye wastewater and the printing-dyeing wastewater, has adsorption performance obviously superior to the adsorption performance of commonly-used adsorbentnamely active carbon, and can simultaneously and efficiently remove dyes, starch and PVA organic pollutants in the printing-dyeing wastewater.

Description

technical field [0001] The invention relates to the field of adsorbents for wastewater treatment, in particular to an adsorbent suitable for treating dyes and printing and dyeing wastewater and a preparation method thereof. Background technique [0002] The sizing process plays an extremely important role in the textile production process. In the sizing production process, starch or modified starch, PVA, and polyacrylic sizing are usually used to sizing the warp yarns to increase the strength of the yarn and reduce the Yarn hairiness improves the rubbing fastness of the yarn, thereby ensuring the quality and efficiency of textile production. In order to ensure the printing, dyeing and finishing effects of textiles, desizing and dyeing have become two indispensable processing processes in the textile printing and dyeing process. Therefore, printing and dyeing factories usually produce a large amount of wastewater containing starch, PVA and colored dyes during production and ...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the defects that the existing fixed bed adsorbents are not strong enough to adsorb organic pollutants when treating dyes and printing and dyeing wastewater, and cannot efficiently remove dyes, starch and PVA organic pollutants in printing and dyeing wastewater at the same time, and provide a A kind of dye that has a high adsorption and removal capacity for dyes in dye wastewater, and can efficiently remove dyes, starch and PVA organic pollutants in printing and dyeing wastewater and an adsorbent for fixed bed printing and dyeing wastewater treatment

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