膨润土的改性及其对废水中铬的吸附性能研究  

STUDY ON BENTONITE'S MODIFICATION AND APPLICATION IN ADSORPTION OF CHROMIUM(Ⅵ)

作　　者：马小隆[1] 刘晓明[1] 宋吉勇[1] 

机构地区：[1]山东科技大学化学与环境工程学院,山东青岛266510

出　　处：《能源环境保护》2005年第4期18-21,共4页Energy Environmental Protection

摘　　要：探讨了膨润土的改性方法,系统地研究了活化钙基膨润土所需无机酸的浓度、活化时间及活化温度对膨润土活性的影响,确定出最佳改性条件;对改性机理进行了一定的探讨。然后做了用改性钙基膨润土吸附污水中的Cr(Ⅵ)的条件试验,证明了改性钙基膨润土对重金属离子Cr(Ⅵ)有比较强的吸附性能。In this paper, the natural Ca- bentonite was modified successfully into activated clay under the best conditions of the certain pH value, activated time and activated temperature. Under the condition of static state, the adsorbing effect of modified bentonite against Cr（ Ⅵ ） were studied. It proved that modified bentonite adsorbed the heavy metal ions successfully, pH value of solution was the most important influencing factor. The mechanism of chromium adsorption was discussed.

关 键 词：钙基膨润土 改性 吸附 重金属离子 机理 

分 类 号：X703[环境科学与工程—环境工程]