纤维素基吸附剂——绿色、经济的水处理材料
摘要:介绍了一类基于天然纤维素的水处理用吸附剂.对纤维素修饰羧基等阴离子基团,可以用来吸附水中的重金属阳离子(如Cd2+、Cu2+、Hg2+、Ni2+、Pb2+).对纤维素修饰铝铁或胺基等成分,可以吸附水中含砷阴离子、氟离子等有害阴离子.在纤维素上修饰疏水链,可以吸附水中氯苯、染料等危害健康的有机物.
关键词:纤维素 / 水处理 / 重金属 / 有害阴离子 / 有机物Abstract:This paper reviews the adsorbents based on natural cellulose for water treatment. Cellulose modified with negatively charged groups such as carboxyls can be used for the removal of heavy metal ions including Cd2+,Cu2+,Hg2+,Ni2+ and Pb2+. If cellulose is modified with anion adsorptive components such as aluminum, iron and amino groups, it can adsorb harmful anions such as fluoride and arsenic. Cellulose can also adsorb organics such as chlorobenzene and dyes if it is modified with hydrophobic chains.
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