Preparation, characterization and lead sorption performance of alginate-SBA-15 composite as a novel adsorbent

被引：46

作者：

Cheraghali, R. ^{[1
]}

Tavakoli, H. ^{[2
]}

Sepehrian, H. ^{[3
]}

机构：

[1] Islamic Azad Univ, Saveh Branch, Dept Chem, Saveh, Iran

[2] Islamic Azad Univ, Nour Branch, Fac Engn, Nour, Iran

[3] Nucl Sci & Technol Res Inst, Tehran, Iran

来源：

SCIENTIA IRANICA | 2013年 / 20卷 / 03期

关键词：

Nanoporous materials; SBA-15; Alginate; Lead; Adsorption studies; HEAVY-METAL IONS; MESOPOROUS SILICA; AQUEOUS-SOLUTION; ALIPHATIC-ALCOHOLS; ORGANIC LIQUIDS; WASTE-WATER; REMOVAL; POLYURETHANE; EQUILIBRIUM; BIOSORPTION;

D O I：

10.1016/j.scient.2013.05.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alginate-SBA-15 (ALG-SBA-15) was synthesized by encapsulation of the nanoporous SBA-15 in the biopolymeric matrix of calcium alginate. This adsorbent was characterized using powder X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), nitrogen adsorption-desorption and Fourier transform infrared (FT-IR) spectroscopy. Tests were then conducted to study the adsorption of lead ions onto ALG-SBA-15 from an aqueous solution for the effect of pH, contact time and temperature in batch systems. Freundlich and Langmuir models were used for a mathematics description of the adsorption isotherm. The equilibrium process was described well by the Langmuir isotherm model with the maximum sorption capacity of 222.22 mg g(-1) of lead on ALG-SBA-15. The kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-second-order kinetic model. The values of calculated thermodynamic parameters (Delta G degrees, Delta H degrees and Delta S degrees) indicated the endothermic and spontaneous nature of adsorption. All the results validated the feasibility of ALG-SBA-15 for highly effective removal of lead from an aqueous solution. (C) 2013 Sharif University of Technology. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：1028 / 1034

页数：7

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