The study of adsorption characteristics Cu2+ and Pb2+ ions onto PHEMA and P(MMA-HEMA) surfaces from aqueous single solution

被引：142
作者：
Moradi, O. [1 ]
Aghaie, M. [2 ]
Zare, K. [1 ,3 ]
Monajjemi, M. [1 ]
Aghaie, H. [1 ]
机构：
[1] Islamic Azad Univ, Dept Chem, Sci & Res Branch, Tehran, Iran
[2] Islamic Azad Univ, Fac Chem, N Tehran Branch, Tehran, Iran
[3] Shahid Beheshti Univ, Dept Chem, Tehran, Iran
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 170卷 / 2-3期
关键词：
Adsorption; 2-Hydroxyethyl methacrylate (HEMA); Langmuir isotherm; Heavy metal ions; HEAVY-METAL IONS; ACTIVATED CARBON; WASTE-WATER; INDUSTRY WASTE; LEAD IONS; TREE FERN; REMOVAL; SORPTION; COPPER; DIFFUSION;
D O I：
10.1016/j.jhazmat.2009.05.012
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The adsorption characteristics of Cu2+ and Pb2+ ions onto poly2-hydroxyethyl methacrylate (PHEMA) and copolymer 2-hydroxyethyl methacrylate with monomer methyl methacrylate P(MMA-HEMA) adsorbent surfaces from aqueous single solution were investigated with respect to the changes in the pH of solution, adsorbent composition (changes in the weight percentage of MMA copolymerized with HEMA monomer), contact time and the temperature in the individual aqueous solutions. The linear correlation coefficients of Langmuir and Freundlich isotherms were obtained. The results revealed that the Langmuir isotherm fitted the experimental results better than the Freundlich isotherm. Using the Langmuir model equation, the monolayer adsorption capacity of PHEMA surface was found to be 0.840 and 3.037 mg/g for Cu2+ and Pb2+ ions and adsorption capacity of (PMMA-HEMA) was found to be 31.153 and 31.447 mg/g for Cu2+ and Pb2+ ions, respectively. Changes in the standard Gibbs free energy (Delta G(0)), standard enthalpy (Delta H-0) and standard entropy (AS) show that the adsorption of mentioned ions onto PHEMA and P(MMA-HEMA) are spontaneous and exothermic at 293-323 K. (C) 2009 Elsevier B.V. All rights reserved.
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页码：673 / 679
页数：7
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