离子强度对恒电荷土壤胶体吸附Cu^(2+)和Pb^(2+) 的影响  

IONIC STRENGTH EFFECTS ON CU^(2+), Pb^(2+) ADSORPTIONIN CONSTANT CHARGE SOIL COLLOIDS

作　　者：杨亚提[1] 张平[2] 

机构地区：[1]西北农林科技大学生命科学学院,杨凌712100 [2]西北农林科技大学资源与环境学院

出　　处：《环境化学》2001年第6期566-571,共6页Environmental Chemistry

摘　　要：采用平衡法研究了离子强度、表面电位对恒电荷土壤胶体吸附Ｃｕ２＋和Ｐｂ２＋的影响．结果表明,离子强度越小,表面电位越高,土壤胶体对Ｃｕ２＋和Ｐｂ２＋的吸附量越大．在离子强度小于１．０ｍｏｌ·ｋｇ－１范围内,土壤胶体对Ｃｕ２＋和Ｐｂ２＋的吸附包括静电吸附和专性吸附;离子强度大于１．０ｍｏｌ·ｋｇ－１以后,土壤胶体对Ｃｕ２＋和Ｐｂ２＋的吸附受专性吸附控制．Equilibrium method was applied to investigate effect of iom'c strength and surface potential on Cu2+ , Pb2+ adsorption in soil colloids. Results showed that the lower ionic strength was, the higher surface potential was, the larger Cu2+ , Pb2+ adsorbed amount in soil colloids was. Ad-sorption included specific adsorption and electrostatic adsorption when ionic strength was low to 1.0 mol kg-1,whereas, adsorption of Cu2+ , Pb2+ on soil colloids was controlled by specific adsorp-tion.

关 键 词：恒电荷土壤胶体 离子强度 吸附 铝离子 污染治理 土壤污染 铜离子 

分 类 号：O647.3[理学—物理化学]