Functionalized Cellulosic Fibers for Removal of Toxic Metal Ions From Contaminated Water

被引:5
|
作者
Singha, A. S. [1 ]
Guleria, Ashish [1 ]
机构
[1] Natl Inst Technol, Dept Chem, Hamirpur 177005, HP, India
关键词
Cellulosic fiber; Toxic metal ion; Graft copolymer; Adsorption isotherm; Adsorption kinetics; AQUEOUS-SOLUTIONS; WASTE-WATER; ADSORPTION; ADSORBENTS;
D O I
10.1080/1023666X.2014.850910
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Functionalization of cellulosic okra fibers was carried out by graft copolymerization of acrylamide in the presence of ascorbic acid and hydrogen peroxide as redox initiator in aqueous medium. Different reaction parameters such as time, temperature, initiator concentration, and monomer concentration were optimized to obtain the maximum graft yield. The graft copolymerized fibers were characterized by FT-IR, TGA, and X-ray diffraction techniques. Further, chemically modified fibers were used for removal of Zn2+ and Cd2+ toxic metal ions from contaminated water. The effect of pH, contact time, and metal ion concentration was studied in batch mode experiments. The kinetics of adsorption were studied using pseudo-first and pseudo-second-order kinetic models. The adsorption isotherm was studied using Langmuir and Freundlich isotherm models. The Langmuir model was found to fit the equilibrium data well.
引用
收藏
页码:10 / 21
页数:12
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