Thermodynamic properties and adsorption behaviour of hydrogel nanocomposites for cadmium removal from mine effluents

被引：55
作者：
Fosso-Kankeu, E. [1 ]
Mittal, Hemant [2 ,3 ]
Waanders, F. [1 ]
Ray, Suprakas Sinha [2 ,3 ]
机构：
[1] North West Univ, Fac Engn, Sch Chem & Minerals Engn, Potchefstroom Campus, Potchefstroom, South Africa
[2] CSIR, DST CSIR Natl Ctr Nanostruct Mat, ZA-0001 Pretoria, South Africa
[3] Univ Johannesburg, Dept Appl Chem, ZA-2028 Doornfontein, South Africa
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2017年 / 48卷
基金：
新加坡国家研究基金会;
关键词：
Hydrogel nanocomposite; Cadmium ions; Adsorption models; Thermodynamic; AQUEOUS-SOLUTION; GUM-GHATTI; WATER; CLINOPTILOLITE; EQUILIBRIUM; PH; FLOCCULATION; BIOSORPTION; COMPOSITE; MEMBRANES;
D O I：
10.1016/j.jiec.2016.12.033
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This research paper reports on the utilization of the hydrogel of gelatine (GL) and its hybrid nanocomposite with clinoptilolite for the adsorption of Cd2+ ions from an aqueous solution and multi metal ions from mine effluents. The hydrogel was synthesized using the graft co-polymerization of acrylamide (AAm) onto GL and the hybrid hydrogel nanocomposite was prepared by incorporating clinoptilolite within the hydrogel matrix. The synthesized polymers were characterized using different characterization techniques such as FTIR, XRD, SEM and TGA. The adsorption behaviour of the synthesized adsorbents for the adsorption of Cd2+ was studied using different adsorption parameters such as pH, temperature and adsorbent dosage. Adsorption kinetics followed the pseudo-second-order rate equation, whereas, the adsorption isotherm followed both the Freundlich and Langmuir isotherm models. The thermodynamics studies revealed that the adsorption processes were spontaneous and endothermic in nature. Moreover, the synthesized adsorbents were also successfully utilized for the adsorption of different metal ions from the mine effluents. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：151 / 161
页数：11
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