ZrO_2负载碳纳米管吸附去除水中氟的研究  

ADSORPTIVE REMOVAL OF FLUORIDE FROM AQUEOUS SOLUTION USING ZrO_2 SUPPORTED ON MULTIWALL CARBON NANOTUBE

作　　者：王家宏[1] 常娥[1] 丁绍兰[1] 韩晓晶[2] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021 [2]陕西科技大学化学与化工学院,西安710021

出　　处：《离子交换与吸附》2012年第1期62-69,共8页Ion Exchange and Adsorption

基　　金：国家水专项<淮河流域水污染治理技术研究及集成示范项目>子课题<制革清洁生产及废水处理关键技术研究与示范>(2008ZX07010-003-002);陕西科技大学博士科研启动基金(BJ10-21);陕西科技大学研究生创新基金(SUSTCX09-09)

摘　　要：以ZrO2负载多壁碳纳米管（ZrO2-MWCT）为吸附剂，系统研究了其对水中F的吸附、脱附性能。结果表明，F在ZrO2-MWCT吸附剂上的吸附等温线可以用Freundlich方程模拟，吸附动力学符合拟二级动力学方程，吸附速率随着F初始浓度的提高而减低。当pH为4—5时，F在ZrO2-MWCT吸附剂上的吸附量最大。水中阴离子的存在降低ZrO2-MWCT对F的吸附量，不同阴离子对F影响的大小顺序为：CO3^2-〉SO4^2-〉Cl^-〉NO3^-。吸附饱和的ZrO2-MWCT可用0．1mol／L的NaOH脱附再生，经4次再生后，其吸附量仍为14．55mg／g。ZrO2 supported on multiwall carbon nanotube （ZrO2-MWCT） was prepared, and its adsorption and desorption behaviors for aqueous fluoride were investigated. Results showed that adsorption isotherm of F- onto ZrOz-MWCT could be modeled by Freundlich equation. The pseudo-second-order kinetics could fit the adsorption data very well and adsorption rate decreased with increasing initial F concentration, The maximum adsorption amount of F on ZrO2-MWCT was found to be at pH 4-5. The presence of anions in solution resulted in the suppressed F adsorption onto ZrO2-MWCT, and the effect of different anions was in the order of CO3^2-〉SO4^2-〉Cl-〉NO3^-. Fluoride loaded ZrO2-MWCT was regenerated by 0.1mol/L NaOH solution and F adsorption amount was 14.55mg/g after four adsorption-regeneration cycles.

关 键 词：ZrO2负载碳纳米管 吸附 氟(F) 脱附再生 

分 类 号：TQ424.2[化学工程]