摘要
试验研究了镉和铅 2种重金属在蒙脱土和高岭土上的吸附 ,以及外加腐殖酸的 3种组分 (富里酸、棕色胡敏酸和灰色胡敏酸 )的影响 .镉铅在粘土上的吸附随着介质 pH的升高而增加 .在 pH4～ 8范围内的任意 pH点 ,镉在高岭土上的吸附量因富里酸而降低 ,因 2种胡敏酸而升高 ;当 pH值高于 6时 ,吸附量急剧增加 .外加富里酸使得铅在粘土上的吸附在pH >6时意外出现随着介质
Adsorption of cadmium and lead on montmorillonite and kaolin, together with the effect of humic substances was studied. It was found that adsorption amount of Cd and Pb increased as pH value of ambient solution increased. Addition of FA reduced Cd sorption on kaolin at each respective pH value while GHA and BHA increased Cd adsorption amount. A sharp increase was found at pH values higher than 6. Whereas, lead sorption on both clays in the presence of FA unexpectedly decreased as pH values increased when pH>6.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2002年第5期109-112,共4页
Environmental Science
基金
国家自然科学基金项目 (40 0 710 4 6 )
中国科学院知识创新重要方向项目 (KZCX2 4 0 1)
