摘要
研究活性水合氧化铁对砷(Ⅴ)的吸附行为,讨论不同砷铁比、反应时间、温度、pH值、干扰离子、老化时间等对砷(Ⅴ)吸附的影响,分析其在不同温度下的吸附等温线及其对砷(Ⅴ)的吸附动力学,确定活性水合氧化铁处理含砷(Ⅴ)废水的最佳实验条件.结果表明:Langmuir方程能较好地描述吸附平衡,其吸附动力学符合Lagergren二级方程.干扰离子F-和Cl-离子对砷(Ⅴ)的去除几乎没有影响,而SiO32-、SO42-、PO43-等离子的存在则抑制砷(Ⅴ)的去除.
The object of this paper is to study the adsorption behaviors of arsenic （ V ） in the activity hy- drous ferric oxide. The influential factors such as iron/arsenate ratio, reaction time, reaction tempera- ture, solution pH, competitive-anions in solution and aging time on removal of arsenic （ V ） were dis- cussed. The optimum condition for arsenic （ V ） removal from water by hydrous ferric oxide was ob- tained. The results showed that the adsorption isotherm of arsenic （ V ） on hydrous ferric oxide could be described by the Langmuir equations. The adsorption kinetic data could be described by the Lagergren second-order rate equation. The F- and Cl - in the solution had almost no effect on the adsorption of arse- nic （ V ） on hydrous ferric oxide, but PO43 - , SiO2- and SO2- caused arsenic （ V ） removal percentage decrease.
出处
《沈阳化工学院学报》
2010年第1期7-11,共5页
Journal of Shenyang Institute of Chemical Technolgy
基金
辽宁省教育厅基金资助项目(2008573)
关键词
水合氧化铁
砷(Ⅴ)
吸附
废水
hydrous ferric oxide
arsenic （ V ）
adsorption
wastewater
