羟基金属柱撑膨润土吸附氟的性能研究  

Adsorption of fluoride on hydroxy-metal pillared bentonite

作　　者：李益民[1] 张华[1] 李海洋[2] 

机构地区：[1]绍兴文理学院化学系,浙江绍兴312000 [2]中国科学院安徽光学精密机械研究所环境光谱学实验室

出　　处：《环境污染与防治》2006年第1期1-4,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.20073042);浙江省自然科学基金资助项目(No.202018)。

摘　　要：将膨润土进行改性制得4种羟基金属柱撑膨润土,用XRD考察了层间结构,并将它们应用于含氟废水的吸附处理中,研究了各种吸附剂的吸附速率、介质的pH、吸附剂用量、饱和吸附曲线和吸附剂的重复使用性。结果表明,改性得到的羟基金属柱撑膨润土的层间距都明显变大,在实验条件下对氟离子的吸附性能为羟基铁铝复合柱撑膨润土>羟基铁柱撑膨润土>羟基铝柱撑膨润土。该类吸附剂对氟离子还具有较好的重复使用性。Four kinds of hydroxy-metal pillared bentonite used to remove fluoride form synthetic solutions were prepared and the intenlayer of bentonite was examined by XRD. The effects of various parameters such as contact time, pH, and absorbent dosage on the absorption efficiency were investigated. The research results show that the removal percentages of fluoride using these adsorbents follows the sequence： hydroxy-iron-alumina-pillarcd bentonite 〉 hydroxy iron-pillared bentonite 〉 hydroxy-alumina-pillared. The adsorbents can be reused.

关 键 词：氟离子 吸附 羟基铁柱撑膨润土 羟基铝柱撑膨润土 羟基铁铝柱撑膨润土 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]