Removal of cadmium from aqueous solution using low molecular weight chitosan derivative

被引：47

作者：

Boamah, Peter Osei ^{[1
,2
]}

Huang, Yan ^{[1
]}

Hua, Mingqing ^{[1
]}

Zhang, Qi ^{[1
,3
]}

Liu, Yuanyuan ^{[1
]}

Onumah, Jacqueline ^{[2
]}

Wang, Wei ^{[1
]}

Song, Yongxiu ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Bolgatanga Polytech, Dept Ecol Agr, Bolgatanga, Ghana

[3] Hainan Univ, Hainan Prov Key Lab Fine Chem, Haikou 570228, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2015年 / 122卷

基金：

中国国家自然科学基金;

关键词：

Glutaraldehyde; Low molecular weight chitosan; Pyruvic acid; Cadmium; Chelation; CROSS-LINKED CHITOSAN; ADSORPTION PROPERTIES; KINETIC-MODELS; HEAVY-METALS; COPPER; IONS; EQUILIBRIUM; SORPTION; CD(II); CU(II);

D O I：

10.1016/j.carbpol.2015.01.004

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A 2(3) factorial design was used to examine the sorption of Cd2+ onto cross-linked low molecular weight chitosan pyruvic acid derivative. Three factors and two levels of solution pH (A) (6.0 or 10.0), temperature (B) (45 or 70 degrees C) and Cd(II) concentration (C) (1 or 3 mg/L) were considered. Batch mode system was employed with 0.05 g of the sorbent and 25 mL of Cd(II) solution. The efficiency of cadmium removal during an exposition time of 4h was then evaluated. The factors and their interaction effect on the cadmium removal efficiency followed the order: Cd(II) concentration > solution pH > interaction between solution pH and Cd(II) concentration > interaction between solution pH, temperature and Cd(II) concentration. Langmuir isotherm model was the best isotherm model. The Pseudo second order fitted well the kinetic data. The thermodynamic studies revealed the nature of the cadmium sorption. (C) 2015 Published by Elsevier Ltd.

引用

页码：255 / 264

页数：10

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