Cationic dextran-based polymer and preparation thereof, and applications as flocculant

Abstract

The invention discloses a cationic dextran-based polymer preparation method, which comprises: adding potassium persulfate to a dextran solution under an oxygen-free condition, stirring for 15-20 min,adding METAC, carrying out a reaction for 2-4 h at a temperature of 65-75 DEG C, adding ethanol to obtain a precipitate, purifying, washing, and drying to obtain white dry solid particles, ie., the cationic dextran-based polymer, wherein a sucrose solution is subjected to an enzyme-catalyzed fermentation reaction with dextran sucrose to obtain the dextran solution. Compared with the commercially available organic flocculant, the flocculating agent of the invention is safe, non-toxic and pollution-free, does not contain environmentally harmful components, and achieves the industrial productionand application of environmentally-friendly bioflocculants; and based on the basic skeleton structure of the biopolymer, the grafted derivative can be regenerated, and has good biodegradability and good biocompatibility so as to meet the ecological concept of sustainable development.

Description

technical field [0001] The invention relates to the field of biological polysaccharide-based flocculants, in particular to a cationic dextran derivative flocculant and a preparation method thereof. Background technique [0002] With the rapid development of industry and the growth of population, more and more surface water and groundwater are polluted to varying degrees. The deterioration of water quality and the shortage of water resources have become huge problems that urgently need to be solved in today's society. In the field of water treatment, flocculation technology is the most widely used and most critical step, and the flocculation efficiency mainly depends on the choice of flocculant type. In the past few decades, inorganic flocculants (aluminum salts and iron salts, etc.) and some synthetic organic polymers (such as polyacrylamide) have been widely used in the flocculation process, but they have also caused serious secondary pollution. and new environmental probl...

AI Technical Summary

Problems solved by technology

In the past few decades, inorganic flocculants (aluminum salts and iron salts, etc.) and some synthetic organic polymers (such as polyacrylamide) have been widely used in the flocculation process, but they have also caused serious secondary pollution. and new environmental issues

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