角蛋白分子结构中有丰富的氨基酸,分布在氨基酸分子链表面的氨基、羧基、羟基等官能团可作为染料和重金属的吸附位点,此结构特点赋予了角蛋白去除有毒物质的条件,由于角蛋白自身成膜性较差,研究人员将其与其他助剂混合制备了海绵状、膜状、絮凝剂、水凝胶等其他角蛋白基复合材料在染料以及重金属吸附方面进行研究。综合阐述了角蛋白的结构以及对染料和重金属的吸附机理,总结归纳了当前研究人员通过对角蛋白进行改性制备出的角蛋白基复合材料,并在染料废水和重金属废水中的研究进展,为角蛋白基复合材料在水处理方面的研究提供借鉴和研究方向。
Keratin molecular structure is rich in amino acids,and amino,carboxyl,hydroxyl and other functional groups distributed on the surface of amino acid molecular chain can be used as adsorption site for dyes and heavy metals.This structural feature endows keratin with the ability to remove toxic substances.Due to the poor film-forming of keratin itself,researchers have mixed it with other additives to prepare sponge-like,film-like,flocculant,hydrogel and other keratin-based composites in dyes and heavy metal adsorption for research.The structure of keratin and the adsorption mechanism of dyes and heavy metals were comprehensively elaborated.The research progress of keratin-based composites prepared by modifying keratin,and their application in dye wastewater and heavy metal wastewater was summarized,which provided reference and research direction for the research of keratin-based composites in water treatment.
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