多离子体系中黄河沉积物对重金属的竞争吸附研究  

Competition Adsorption on Heavy Metals of the Yellow River Sediments in the Polyion Coexisting System

作　　者：何江[1] 李朝生[1] 王新伟[1] 孙卫国[1] 米娜[1] 

机构地区：[1]内蒙古大学生态与环境科学系,呼和浩特010021

出　　处：《沉积学报》2003年第3期500-505,共6页Acta Sedimentologica Sinica

基　　金：内蒙古自然科学基金 (990 30 3 - 1 );内蒙古教育厅重点项目基金 (ZD990 1 );内蒙古"32 1人才工程"基金 (内人 (99) 51 );内蒙古"1 1 1人才工程"基金;教育部高等院校骨干教师项目基金资助

摘　　要：以黄河包头段上游清洁河段的沉积物为吸附剂 ,以Pb2 + 、Cu2 + 、Zn2 + 、Cd2 + 4种离子的混合溶液体系为吸附质 ,开展了重金属离子在黄河沉积物中的竞争吸附及其影响因素等实验研究。结果表明 ,混合溶液体系中不同离子间的吸附竞争有显著的拮抗或协同效应关系 ,4种重金属离子在黄河沉积物中竞争吸附的能力依序为Pb2 + ≥Cu2 +>Zn2 + ≥Cd2 + 。Sediments are taken from the clean reach in the Baotou section of the Yellow Riv er as the adsorbent, the mixed solution system made up of Pb 2+ , Cu 2+ , Zn 2+ and Cd 2+ as the adsorbate, experimental research has been car ried out on the competition adsorption of the Yellow River sediments on heavy me tals. The experiment has clarified the competitive adsorption order of Pb 2+ ≥ Cu 2+ > Zn 2+ ≥ Cd 2+ , the cooperative adsorption relation of Cu—Pb, Zn—Cd and the resistant adsorption relation of Cu—Zn, Cu—Cd, Pb— Zn and Pb—Cd. The study is of great significance in evaluating the potential ri sk of heavy metals in the river sediments.

关 键 词：多离子体系 黄河沉积物 重金属 吸附 污染 生态系统 

分 类 号：P512.2[天文地球—地质学] X131.2[环境科学与工程—环境科学]