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.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
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
关键词
黄河
沉积物
镉
吸附力
形态转化
实验
adsorption
transformation
Cd 2+
the Yellow River sediments
