吉林大学学报（理学版）2012，Vol.50Issue(4)：815-821,7.
改性硅藻土对重金属离子的吸附规律
Adsorption Law of Heavy Metals on Modified Diatomite
摘要
Abstract
Rich low-grade diatomite mineral was modified with calcium carbonate so as to improve the adsorption properties of diatomite for heavy metal ions. The results show that in a single component system, the dynamic laws for the adsorption of Cu2 + , Pb2 + , Cd2 + and Zn2 + on the diatomite modified by calcium carbonate obey the pseudo-second-order model and the adsorption thermodynamics laws obey the Langmuir model. In a mixed component system, because of the effect of coexisting components, the adsorption rate of Pb2+ ,Cd2+ and Zn2+ was decreased respectively and the adsorption rate of Cu2+ was increased, but the adsorption dynamic laws of four kinds of metal ions still obey the pseudo-second-order model; at the same time, the adsorption capacities of four kinds of metal ions on the modified diatomite were decreased obviously and only the adsorption thermodynamics law of Pb2 + obeys the Langmuir model.关键词
硅藻土/改性/重金属/吸附Key words
diatomite/ modified/ heavy metals/ adsorption分类
资源环境引用本文复制引用
杨婷,王洪良,吕春欣,熊鹰,何冲,康春莉..改性硅藻土对重金属离子的吸附规律[J].吉林大学学报（理学版）,2012,50(4):815-821,7.基金项目
吉林省环保局科研项目(批准号:2007-13). （批准号:2007-13）
