摘要
以钠基膨润土为原料,制备镍钛交联改性膨润土、镍钛有机复合改性膨润土,并应用于含铬模拟废水的处理。探讨了改性膨润土的用量、pH值、吸附时间等最佳使用条件,比较了原土、交联改性土、有机复合改性土对铬的吸附效果。结果表明改性土的吸附效果明显优于原土,在最佳实验条件下,交联改性土、有机复合改性土对Cr(Ⅵ)的去除率分别达到了87%和96%。两种改性土对铬吸附行为均符合Langmuir吸附等温方程,饱和吸附量和Lang-muir常数分别为3.1827mg/g、8.5543mg/g和3.5007、1.2738。
Two kinds of modified montmorillonites were synthesized from Na-montmorillonite, namely Ni-Ti-cross-linked-montmorillonite and Ni-Ti-organic compound montmorillonite. Some factors were examined in the experiments of Cr（ Ⅵ ）-bearing wastewater disposal. The feeding amount of modified montmorillonite, the pH of wastewater and the stirring time, and the Cr（ Ⅵ ） removal rate on three kinds of montmorillonites were studied. The results show that the removal rate of Cr（ Ⅵ ） on modified montmorillonite under optimized conditions has reached 87 % and 96 %, that the adsorption obeys Langmuir adsorption isotherm, and that the saturated adsorption amount and the Langmuir constant are 3. 182 7 mg/g, 8. 554 3 mg/g and 3. 500 7, 1. 273 8, respectively.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2005年第6期543-546,共4页
Acta Petrologica et Mineralogica
基金
辽宁省教育厅科学研究计划资助项目(A类)项目(2004D080)
作者简介
孙伶（1977-）,女,助教,硕士,主要从事分析化学教学和水处理科研工作.
