凹凸棒土负载铁盐吸附剂的制备及其对As(Ⅴ)的吸附性能  

Preparation of attapulgite loaded with ferrihydrite adsorbent and its adsorption propreties of As( Ⅴ)

作　　者：王冰冰[1] 李嫚[1] 徐红波[1] 王舰[1] 何璐[1] 

机构地区：[1]辽宁科技大学化学工程学院,鞍山114051

出　　处：《环境化学》2014年第4期656-662,共7页Environmental Chemistry

基　　金：辽宁省教育厅科学研究基金项目(L2012102);辽宁科技大学科研专项基金(2012CX03)资助

摘　　要：研究凹凸棒土负载铁盐吸附剂的制备及其对As(Ⅴ)的吸附性能.考察了pH、凹凸棒土热改性温度、粒度、铁盐浓度等因素对吸附As(Ⅴ)性能的影响.结果表明,热改性温度为600℃的凹凸棒土负载铁盐吸附剂吸附As(Ⅴ)效果比200℃和400℃都好,其对As(Ⅴ)的吸附行为符合Freundlich模型.当pH值6.0时,600℃热改性200—400目的凹凸棒土负载0.5 mol·L-1Fe(NO3)3吸附剂的最大吸附量为1.1669 mg·g-1,重复使用时性能稳定,具有处理含As(Ⅴ)废水的应用前景.Attapulgite （ATP） loaded with ferrihydrite adsorbent was prepared, and its adsorption propreties of As（ V ） were studied. The effects of various parameters such as solution pH, heat modified temperature, particle size of ATP, and concentrations of ferrihydrite on the adsorption rate of As（ V ） were assessed. The results showed that 600 ℃ modified ATP loaded with ferrihydrite sorbent had better arsenate adsorption efficiency than 200 ℃ and 400 ℃ modified ATP. Equilibrium data of arsenic adsorption fitted well with Freundlich isotherm model. The 200-400 mesh of ATP loaded with 0.50 Mol· L^-1 ferric nitrate sorbent reached adsorption equilibrium in 24 h and had a substantial binding capacity at pH 6.0. The maximum static adsorption capacity of the sorbent for As（ V ） was 1.1669 mg·g^-1. The sorbent showed good stability and reusability towards As（ V ）. The sorbent can potentially be used for the treatment of waste water containing arsenate.

关 键 词：AS(V) 凹凸棒土 负载铁盐吸附剂 吸附性能 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]