Recycled chitosan nanofibril as an effective Cu(II), Pb(II) and Cd(II) ionic chelating agent: Adsorption and desorption performance

被引：156

作者：

Liu, Dagang ^{[1
]}

Li, Zehui ^{[1
]}

Zhu, Yi ^{[1
]}

Li, Zhenxuan ^{[1
]}

Kumar, Rakesh ^{[2
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Dept Chem, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China

[2] Birla Inst Technol, Dept Appl Chem, Patna 800014, Bihar, India

来源：

CARBOHYDRATE POLYMERS | 2014年 / 111卷

基金：

中国国家自然科学基金;

关键词：

Chitosan nanofibrils; Adsorption; Metal ions; Desorption; HEAVY-METAL IONS; AQUEOUS-SOLUTION; COMPETITIVE ADSORPTION; KINETICS; REMOVAL; ZN(II); EQUILIBRIUM; BEHAVIOR; SORPTION; RESIN;

D O I：

10.1016/j.carbpol.2014.04.018

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Mechanically disassembled chitosan nanofibrils were prepared and used as metal ion chelating agents. Structure and morphology of nanofibrils were investigated and ionic adsorption or desorption performance were validated to establish related fitting models. In single metal ion solution, the saturated adsorption capacities of Cu(II), Pb(II), Cd(II), Zn(II), and Ni(II) were 168.66, 118.00 and 60.85, 143.67, and 63.32 mg/g, respectively. In ternary metal ion solution, Cu(II) was more competitive to be adsorbed than Pb(II) and Cd(II) and its removal could arrive at 60%. Ions adsorbed by nanofibrils could be released by EDTA and the recovery could keep above 70% after 3 sorption-desorption cycles. Hence, renewable and recyclable nanofibrillar chitosan exhibited a great promising application in metal treatments attributed to its high adsorption capacity and chelation efficiency. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：469 / 476

页数：8

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