Alginate-graphene oxide hybrid gel beads: An efficient copper adsorbent material

被引：186

作者：

Algothmi, Wafa M. ^{[1
]}

Bandaru, Narasimha Murthy ^{[1
]}

Yu, Yang ^{[1
]}

Shapter, Joseph G. ^{[1
]}

Ellis, Amanda V. ^{[1
]}

机构：

[1] Flinders Univ S Australia, Sch Chem & Phys Sci, Flinders Ctr NanoScale Sci & Technol, Adelaide, SA 5001, Australia

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2013年 / 397卷

关键词：

Alginate; Graphene oxide; Copper adsorption; Kinetics; Gel beads; POLYELECTROLYTE IONOTROPIC GELS; TRANSITION-METAL IONS; AQUEOUS-SOLUTION; HYDROGEN-IONS; ADSORPTION; KINETICS; MECHANISM; EXCHANGE; REMOVAL; COMPLEX;

D O I：

10.1016/j.jcis.2013.01.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Here we report on the adsorption performance of calcium alginate (Ca-Alg(2)) and Ca-Alg(2) with encapsulated graphene oxide (Ca-Alg(2)/GO) gel bead adsorbents for the successful removal of Cu2+ ions from aqueous solution. Different adsorbent doses, Cu2+ concentrations and contact times were investigated using equilibrium and kinetic studies. The adsorbents were characterized using Fourier transform-infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and focussed ion beam scanning electron microscopy (FIB/SEM). The equilibrium adsorption data were fitted to Langmuir isotherms and the maximum adsorption capacities of the Ca-Alg(2) and Ca-Alg(2)/GO gel beads were found to be 42.7 mg g(-1) and 60.2 mg g(-1), respectively. The equilibrium adsorption data were fitted to a pseudo-second-order kinetic equation showing that the Ca-Alg(2) gel beads had a higher kinetic adsorption rate at 0.0425 g mg(-1) min(-1) compared to Ca-Alg(2)/GO at 0.0179 g mg(-1) min(-1). (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：32 / 38

页数：7

共 23 条

[1] ALGINIC ACID GELS - THE EFFECT OF ALGINATE CHEMICAL-COMPOSITION AND MOLECULAR-WEIGHT [J].