原子能科学技术2013，Vol.47Issue(7)：1101-1106,6.DOI:10.7538/yzk.2013.47.07.1101
壳聚糖修饰碳纳米管对含铁放射性废水的处理
Chitosan Functionalized Carbon Nanotubes for Iron Ion Containing Wastewater Treatment
摘要
Abstract
The stable isotope 56Fe was used to simulate the radioactive 55Fe,59Fe,and 52 Fe ions existing in the wastewater generated by nuclear medicine and then the removal efficiency of 56Fe2+ in water was studied using chitosan functionalized multi-walled carbon nanotubes (CS-MWNTs) as adsorbent.The influences of pH,temperature,time,and equilibrium ion concentration on the adsorption capacity were studied.The results show that in the same conditions,the adsorption capacity of CS-MWNTs is significantly increased compared to the pristine multi-walled carbon nanotubes (MWNTs).Both CS-MWNTs and MWNTs exhibit a better removal efficiency of Fe2+ in neutral solutions than in acidic solutions,while in basic solutions,the Fe2+ will precipitate and the removal of Fe2+ is no longer due to the adsorption effect.The adsorption equilibrium will be reached in about 3 h and the adsorption of Fe2+ to either CS-MWNTs or MWNTs is endothermic.At room temperature of 25 ℃ and pH=5,the saturate adsorption capacity of CS-MWNTs for Fe2+ is 51 mg/g,and that of pristine MWNTs is 27 mg/g.The Freundlich adsorption model can well represent the adsorption of Fe2+ to both of two kinds of adsorbent materials.关键词
壳聚糖/碳纳米管/铁离子/吸附Key words
chitosan/ carbon nanotube/ iron ion/ adsorption分类
资源环境引用本文复制引用
任超,康斌,常树全,李俊,沈舞婷,代明珠,董宇,戴耀东..壳聚糖修饰碳纳米管对含铁放射性废水的处理[J].原子能科学技术,2013,47(7):1101-1106,6.基金项目
国家自然科学基金资助项目(81071256,81101146,11105073) （81071256,81101146,11105073）
江苏省自然科学基金资助项目(BK2011738,BK2011739) （BK2011738,BK2011739）
江苏省环保厅科研课题资助项目(201151) （201151）
