层状双金属氢氧化物(LDHs)吸附工艺对水中铬去除的试验研究  

Experimental Research on Chromium Removal in Water with Adsorption Process of Layered Double Hydroxides(LDHs)

作　　者：陈雨涵[1] 陈桦[1] 阮秀秀[1] 

机构地区：[1]上海大学环境工程系,上海200444

出　　处：《净水技术》2015年第4期15-22,共8页Water Purification Technology

摘　　要：铬是现代工业生产排放过程中常见的污染物质,通常存在于水体和土壤等介质中,对人类和其他生物会造成危害。该文对层状双金属氢氧化物(LDHs)类材料去除水中铬的研究进展进行了总结。比较了不同LDHs类材料及改性后LDHs类材料去除铬的机制、影响因素及焙烧、复合等手段改性对LDH的结构及吸附性能的改变。改性后的LDHs材料的物理特性(如比表面积等)得到提升,同时吸附性能也得到改善。LDHs类材料吸附铬的主要机制为离子交换、溶解再沉淀、重构等。Chromium is a common pollutant in water, soil and other media in nature, which is discharged from modem industrial processes. The Science and technologies for the abatement of chromium are greatly concerned, because the excess intake of chromium leads harm to organisms. In this paper, the recent research progress of layered double hydroxides （LDHs） used as sorbents in removing chromium and the adsorption mechanisms were summarized. The mechanism and influencing factors of LDHs and modified LDHs were also compared. Adsorption properties of calcinated LDH and composites of LDHs with other materials were introduced. Ion exchange, dissolution and precipitation, reconstruction are the main adsorption mechanism of LDHs on Cr removal.

关 键 词：层状双金属氢氧化物(LDHs) 铬去除 吸附 机理 

分 类 号：X703[环境科学与工程—环境工程]