摘要
以黄河包头段的沉积物为吸附剂,分别以Cd^(2+)单离子溶液体系和Pb^(2+)、Cu^(2+)、Zn^(2+)、Cd^(2+) 4种离子的混合溶液体系为吸附质,开展了在不同体系中Cd^(2+)的吸附、形态转化及释放等的比较实验。结果表明,不同体系中,Cd^(2+)的吸附等温线类型、吸附量、pH突跃区域的差别均较大,但不同体系中Cd^(2+)被沉积物吸附后的形态转化趋势基本相同;多离子体系中Cd^(2+)被吸附后的释放百分率比对应时间的单离子体系大,且释放曲线的峰型亦不同。
Sediments were taken from the Baotou reach of Yellow River as adsorbent, and single and mixed so -lution systems made up of Cd2+, Pb2+, Cu2+ and Zn2+ as adsorbate, and comparative experiment on adsorption, transformation and release of Cd2+ on Yellow River sediments in different systems have been conducted. The result showed that the adsorption isotherm, adsorption capacity and pH- dependent area were different greatly, but transformation of Cd2+ has only a little change. In addition, release percentage of Cd2+ adsorbed on polyion coexisting system was far greater than the single system, and the release curves were different in two systems.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2003年第9期595-598,共4页
Shanghai Environmental Sciences
基金
内蒙古自然科学基金
编号 990303-1
内蒙古教育厅重点项目基金
编号 ZD9901
内蒙古"321人才工程"基金
编号 内人(99)51
教育部高等院校骨干教师基金
内蒙古"111工程"基金