Synthesis and characterization of a starch-AlOOH-FeS2 nanocomposite for the adsorption of congo red dye from aqueous solution

被引：69
作者：
Kumar, Rajeev [1 ]
Rashid, Jamshaid [1 ]
Barakat, M. A. [1 ,2 ,3 ]
机构：
[1] King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Environm Sci, Jeddah 21589, Saudi Arabia
[2] Cent Met R&D Inst, Cairo 11421, Egypt
[3] King Abdulaziz Univ, CEES, Jeddah 21589, Saudi Arabia
来源：
RSC ADVANCES | 2014年 / 4卷 / 72期
关键词：
REMOVAL; PYRITE; STARCH; OXIDE; ACID; EQUILIBRIUM; NANOSTRUCTURES; NANOPARTICLES; MECHANISM; KINETICS;
D O I：
10.1039/c4ra05183a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
This work described the synthesis and characterization of a starch-AlOOH-FeS2 nanocomposite for the adsorption of congo red (CR) dye from aqueous solution. The morphology of the starch-AlOOH-FeS2 was characterized by using scanning and transmission electron microscopy, N-2 adsorption-desorption isotherms, X-ray photoelectron spectroscopy, and fourier transform-infrared spectroscopy. The adsorption of CR onto starch-AlOOH-FeS2 was evaluated as a function of contact time, solution pH, concentration and temperature. The adsorption results demonstrate that the maximum removal of CR was found to be at pH 5. The adsorption kinetics data fitted well to the pseudo first-order equation whereas the Freundlich equation exhibits better correlation to the experimental data. Thermodynamic parameters, such as the standard free energy change (Delta G degrees), the standard entropy change (Delta S degrees) and the standard enthalpy change (Delta H degrees), were also evaluated. The results suggested that starch-AlOOH-FeS2 is a potential adsorbent for CR dye removal from aqueous solution.
引用
收藏
页码：38334 / 38340
页数：7
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