摘要
研究了氢氧化铈对水中砷的吸附特性,结果表明:氢氧化铈对As(Ⅲ)和As(Ⅴ)均有良好的吸附效果,其吸附等温线能很好地用Langmuir方程描述。酸性条件下有利于As(Ⅴ)的吸收,而中性/微碱性条件下有利于As(Ⅲ)的吸收。氢氧化铈粉末粒径及共存离子对吸附效果影响甚微,通过TCLP测试可知吸附后的粉末对环境无二次污染。
The adsorption characteristics of arsenic in water by cerous hydroxide were studied. The results showed that cerous hydroxide had well adsorption effect for trivalent arsenic and pentavalent arsenic. The adsorption isotherms fitted very well for Langmuir equation. It was more suitable to adsorb pentavalent arsenic in an acidic condition, whereas adsorb trivalent arsenic in neutrality/slightly alkaline conditions. The adsorption effect of particle diameter and the coexisted ions of cerous hydroxide were feeble. The powder after adsorption did not have secondary pollution to environment by TCLP test.
出处
《环境卫生工程》
2008年第5期13-15,17,共4页
Environmental Sanitation Engineering
基金
福建省自然科学基金计划项目(D0510005)
关键词
氢氧化铈
砷
吸附
cerous hydroxide
arsenic
adsorption
