Electrochemical preparation method of starch-based functional adsorbent

Abstract

The invention discloses an electrochemical preparation method of a starch-based functional adsorbent. The electrochemical preparation method comprises the following steps: constructing an electrochemical reactor, preparing oxidized starch dispersion liquid, and preparing oxidized starch grafted animal skin collagen degradation product dispersion liquid; the starch-collagen polypeptide composite material containing a Schiff base structure is prepared by oxidizing starch under the action of green electrochemical indirect oxidation and successively carrying out chemical crosslinking on aldehyde groups of oxidized starch and amino groups of collagen degradation product molecules. The starch-based functional adsorbent material is prepared after freeze drying, and the starch-based functional adsorbent material shows excellent water absorption, water retention and biodegradability; tanning waste resources and a green and efficient electrochemical synthesis technology are effectively utilized, and the prepared starch-based functional adsorbent has excellent adsorption capacity on hexavalent chromium, methyl orange and methylene blue in wastewater and is suitable for treatment of various industrial wastewater; the preparation method is simple in operation, accurate in regulation and control, time-saving, efficient, green and environment-friendly, and the raw materials are cheap and easy to obtain.

Description

technical field [0001] The invention belongs to the field of natural polymer materials, and in particular relates to an electrochemical preparation method of a starch-based functional adsorbent. Background technique [0002] As the contradiction between resource utilization and environmental pollution has attracted global attention, cleaner production, recycling, atomic economy, and green and low-carbon are ubiquitous. However, the law of exchange balance in nature is undeniable. Unremitting efforts can maximize resource utilization and effective transformation, but trace waste and emissions are difficult to eliminate. In particular, the high-toxicity-low-concentration system and the low-toxicity cumulative system have always plagued the deep purification of the environment. Wastewater from most chemical industries still contains a large amount of hydrophilic substances after treatment, such as heavy metal ions, neutral salts, dye component ions, etc. Even if the discharge...

AI Technical Summary

Problems solved by technology

However, at present, the synthesis methods of composite materials are mostly physical blending or chemical crosslinking, and after simple physical blending, the phase compatibility of the two polymer materials is poor, the stability of the finished product is poor, and the application is limited.

Moreover, the post-processing requirements for blended materials are relatively strict. The prepared emulsion needs to be processed and dried immediately, and the finished product is mostly stored in a solid state, which is expensive; chemical cross-linking often requires pre-activation (oxidation) treatment of starch molecules, and then Cross-linking with collagen polypeptide molecules, complex operation, high preparation cost, harsh conditions, and poor controllability of composite materials