负载型纳米铁制备条件对As(V)吸附的影响  

Preparation of activated carbon-loaded nano zero-valent iron adsorbent for As(V) removal

作　　者：朱慧杰[1] 王红强[1] 

机构地区：[1]河南城建学院环境与市政工程系,河南平顶山467044

出　　处：《生态学杂志》2011年第9期1988-1992,共5页Chinese Journal of Ecology

基　　金：中国科学院"引进国外杰出人才"项目;国家自然科学基金项目(40803032)资助

摘　　要：以活性炭为载体,制备了负载型纳米铁除砷吸附剂。以除砷效率为目标,优化了制备过程中活性炭的不同粒径、铁盐种类及浓度、反应温度及速度、铁盐浸泡活性炭时间及反应平衡时间等参数。考虑到除砷效率及工程实际的应用,室温时采取活性炭粒径为20～40目、KBH4的滴加速率为1ml·min-1、活性炭经铁盐为质量浓度为6.9%的硫酸亚铁浸泡30min,反应平衡时间为30min时所制备的吸附剂综合除砷效果最好(98%)。Taking activated carbon as a carrier, an activated carbon-loaded nano zero-valent iron （NZVI/AC） adsorbent was prepared for arsenate （ As （V） ） removal. With the removal rate of As（V） as the target, an optimization was conducted on the particle size of activated carbon, the species and concentrations of iron salts, the reaction temperature and reaction rate, the marinated duration of iron salts in activated carbon, and the equilibrium time of reaction. In considering of the As（V） removal rate and the practical utilization of NZVI/AC, the prepared NZVI/AC could have the best efficacy （98% removal of As （V）） when the particle size of activated carbon was 20-40 mesh, KBH4 drop-addition speed was 1 ml .min^-1 , the marinated duration of ferrous sulfate with a mass concentration 6.9% in activated carbon at 25 ℃ was 30 min, and the equilibrium time of reaction was 30 min.

关 键 词：活性炭负载型纳米铁 砷As(V) 吸附 去除率 

分 类 号：X703[环境科学与工程—环境工程]