原子能科学技术2017，Vol.51Issue(9)：1564-1570,7.DOI:10.7538/yzk.2016.youxian.0837
三聚磷酸钠交联壳聚糖/纳米Fe0复合膜对U(Ⅵ)的吸附特性
Adsorption Property of U(Ⅵ) on Tripolyphosphate-crosslinking Chitosan/Nano-Fe0 Composite Membrane
摘要
Abstract
The tripolyphosphate-crosslinking chitosan/nano-Fe0 (CS-Fe) composite membrane was prepared for U(Ⅵ) adsorption.The effect of pH on the adsorption of U(Ⅵ) onto CS-Fe,adsorption kinetics and adsorption isotherms were investigated.The results indicate that the adsorption isotherms fit well with the bi-site Langmuir model,with the phosphate groups from CS-Fe as the main sorption sites and nano-Fe0(FeNPs) as the secondary active sites.The adsorption kinetics follows pseudo second-order model,indicating chemisorption as the rate-controlling step.The enhanced adsorption of U(Ⅵ) for CS-Fe (qm,cal=208.8 mg/g against qm,cal=131.6 mg /g for CS) is attributed to the dispersion of FeNPs in chitosan matrix and the redox reaction between the well-dispersed FeNPs and U(Ⅵ).关键词
CS-Fe复合膜/U(Ⅵ)/吸附动力学/吸附等温线Key words
CS-Fe composite membrane/U(Ⅵ)/adsorption kinetics/adsorption isotherm分类
化学化工引用本文复制引用
黎钊,金解云,王云,曾凯,邹洪斌,周利民..三聚磷酸钠交联壳聚糖/纳米Fe0复合膜对U(Ⅵ)的吸附特性[J].原子能科学技术,2017,51(9):1564-1570,7.基金项目
长江学者和创新团队发展计划资助项目(IRT13054) （IRT13054）
江西省科技厅科技项目资助(20161BBF60059,S2017ZRMSB0473) （20161BBF60059,S2017ZRMSB0473）
江西省教育厅科技项目资助(GJJ161583) （GJJ161583）
