期刊
CARBOHYDRATE POLYMERS
卷 276, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118763
关键词
Corn stalk cellulose; Bifunctional modification; Adsorption; Heavy metal ions; Structure-property relationships
资金
- National Natural Science Foundations of China [21968018, 21666021]
- Jiangxi Province Postgraduate Innovation Project [YC2020-S119]
A corn stalk cellulose-based adsorbent with bifunctional groups of -NH-/-NH2 and C-S/C=S was successfully synthesized, showing efficient removal of Cu2+ and Pb2+ from wastewater. The introduction of CS/C=S groups maintained excellent adsorption performance for Cu2+ while ensuring efficient removal of Pb2+. This novel adsorbent offered a new approach for 'waste treatment by waste'.
A corn stalk cellulose-based adsorbent with bifunctional groups of -NH-/-NH2 and C-S/C=S for efficient removal of Cu2+ and Pb2+ was successfully synthesized. Under specific alkali and reaction conditions, 4.58 mmol/g of CS/C=S groups were further introduced on surface of aminated cellulose with 6.99 mmol/g of amino groups. The introduced CS2 would only participate in the esterification with -NH2 groups to form special dithiocarbamate (DTC) structures containing -NH- groups (-NHCS2- ). The synthesized DTC structures would not reduce total amount of -NH-/-NH2 groups on aminated cellulose to keep its excellent adsorption performance for Cu2+, and the introduced appropriate number of C-S/C=S groups could ensure the efficient removal of Pb2+. It was suitable for removal of coexisting Cu2+ and Pb2+ with low initial concentration in real wastewater, and the removal rates were both close to 100%. The application of the bifunctional cellulose offered a novel way for purpose of 'waste treatment by waste'.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据