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.
出处
《环境化学》
CAS
CSCD
北大核心
2001年第6期566-571,共6页
Environmental Chemistry
