吸附
弗伦德利希方程
自愈水凝胶
化学
废水
多糖
人体净化
丙烯酰胺
水溶液
水溶液中的金属离子
化学工程
聚合物
共聚物
色谱法
离子
有机化学
废物管理
环境工程
环境科学
工程类
作者
Xiaoliang Qi,Lin Lei,Liangliang Shen,Zhipeng Li,Tao Qin,Yuna Qian,Xuan Wu,Xiong Wei,Qianwen Gong,Jianliang Shen
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-05-22
卷期号:7 (12): 11014-11023
被引量:90
标识
DOI:10.1021/acssuschemeng.9b02139
摘要
Designing versatile adsorption materials with high efficiency, excellent reversibility, and economic production is vital for treating wastewater but remains challenging. Here, a new polysaccharide (salecan) based superabsorbent was developed by graft copolymerization of acrylamide and sodium vinylsulfonate onto the salecan and used to remove lead ions (Pb2+) from water. Effects of salecan content, adsorbent amount, contact time, adsorbate concentration, and pH on the extent of Pb2+ adsorption were studied. The optimized absorbent (containing 9 mL of 2% salecan polysaccharide) exhibited an optimal adsorption performance in Pb2+ removal (172.8 mg/g). Noticeably, the adsorptive behavior of gel matched well with the Freundlich isotherm and pseudo-second-order kinetic model. In addition, our product presented no apparent loss in Pb2+ adsorption after 6 cycles. Overall, this work not only provided a new strategy to construct highly efficient and low-cost adsorbent but also demonstrated its potential application for heavy metal removal.
科研通智能强力驱动
Strongly Powered by AbleSci AI