黄河沉积物对Cd^(2+)的吸附及其形态转化影响的实验研究  

An Experimental Study of Adsorption and Transformation on Cd ^(2+) of the Yellow River Sediments

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,内蒙古呼和浩特010021

出　　处：《农业环境科学学报》2003年第2期134-137,共4页Journal of Agro-Environment Science

基　　金：内蒙古自然科学基金(990303-1);内蒙古教育厅重点项目基金(ZD9901);内蒙古"321人才工程"基金(内人(99)51);教育部高等院校骨干教师项目基金资助

摘　　要：采用现场采样及室内分析方法,研究了黄河沉积物对Cd2+的吸附及吸附作用对Cd形态转化的影响。结果表明,Cd2+的吸附等温线属于Langmuir型,Cd2+的吸附强烈地依赖于pH值,离子强度的升高、泥沙浓度的增加以及温度的降低均不利于Cd2+吸附;Cd2+被黄河沉积物吸附后主要转入可交换态和碳酸盐结合态,决定了由Cd造成的污染不易消除。This paper did an experimental rese arch on adsorption and transformati on of the Yellow River sediments on Cd 2+ .The result of the experiment showed that the adsorption isothermof Cd 2+ is belong to type -Langmuir,Cd 2+ adsorption depended strongly on pH values,increasing of ions inte nsity and sediment concentration an d decreasing of temperature make against Cd 2+ adsorption,and Cd 2+ mainly transformed into exchangeab le form and carbonate bound form.Its adsorbed forms determine the release capacity,therefore,it is difficult to elimin ate Cd pollution.

关 键 词：黄河 沉积物 镉 吸附力 形态转化 实验 

分 类 号：X132[环境科学与工程—环境科学]