随着工业和经济的迅速发展,重金属污染越来越严重,对人体危害极大,这引起了人们的广泛关注.通常的处理方法有氧化还原法、膜过滤和溶剂萃取等,但是均存在成本高、污染环境、处理成本高等缺点.吸附法以其绿色无污染、处理效率高、成本低等优点越来越受到人们的青睐,从而掀起了吸附剂研究的狂潮.其中聚酰胺-胺(PAMAM)型树形大分子多孔硅胶逐渐凸显出其优势,由于它分子内部存在许多空腔、表面有高密度的氮和氧官能团等特性,使其对重金属离子具有高吸附率.对近年硅胶负载PAMAM树形大分子去除水中重金属离子的研究进展进行了总结.%With the development of the industry and economy,the pollution of heavy metals is more and more serious and heavy metals are harmful to people,which gives rise to our focus.The common treatment methods are oxidation reduction,membrane filtration,solvent extraction and so on.But they have some drawbacks such as high cost,the pollution,high processing cost and so on.Adsorption method is more popular because of its advantages such as pollution-free,high efficiency of adsorbing and low cost,thus lifting the research frenzy.The porous silica-supported polyamide-amine (PAMAM) dendrimers gradually highlight its advantages such as many cavities in the molecules,high density of nitrogen and oxygen atoms on the surface,which could improve the efficiency of adsorbing heavy metals.This article summarized the research on the removal of heavy metals from aqueous solution by PAMAM dendrimers.
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