摘要
由于层间含有高价态金属阳离子的蒙脱石对特定有机物的吸附能力可大大增强 ,故分别用层间含有Na+ 、Ca2 + 、Al3 + 和Cr3 + 的蒙脱石对垃圾渗滤液中的有机物进行吸附实验 ,研究它们吸附苯酚、二甲苯和COD的能力及离子形态对吸附效果的影响。结果表明 ,含高价金属阳离子的蒙脱石对苯酚和COD的吸附能力较高 ,吸附能力由小到大的顺序为 :Na+ <Ca2 + <Al3 + <Cr3 + 蒙脱石 ;各种类型蒙脱石对二甲苯的吸附能力相对较低 ,并且没有一定的规律可循。并对氢键吸附机制进行了探讨。
The sorption percentages of organic contaminants from refuse percolate by Na +-, Ca 2+-, Al 3+- and Cr 3+-saturated montmorillonite and their influencing factors are studied in this paper. The results show that the sorption capacities of montmorillonite saturated by trivalent cation for phenol and COD are relatively high, and increase in order of Na +-, Ca 2+-, Al 3+- and Cr 3+-montmorillonite. Higher pH values are favorable. Under the experimental conditions, the sorption percentages of phenol and COD by Cr 3+-montmorillonite are up to 67.5% and 60.3%, respectively. The sorption capacities of the several kinds of montmorillonite for dimethylbenzene are low. Different adsorption effects of different montmorillonite can be attributed to H-bonding mechanism.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2001年第4期528-532,共5页
Acta Petrologica et Mineralogica
基金
中国地质调查局资助课题 (DK990 2 0 0 7)
