Removal of Cu(II) and Pb(II) ions from aqueous solutions by adsorption on sawdust of Meranti wood

被引：197
|
作者：
Ahmad, Anees [1 ]
Rafatullah, Mohd. [2 ]
Sulaiman, Othman [2 ]
Ibrahim, Mahamad Hakimi [1 ]
Chii, Yap Yee [1 ]
Siddique, Bazlul Mobin [1 ]
机构：
[1] Univ Sains Malaysia, Environm Technol Div, Sch Ind Technol, George Town 11800, Malaysia
[2] Univ Sains Malaysia, Bioresource Paper & Coatings Technol Div, Sch Ind Technol, George Town 11800, Malaysia
来源：
DESALINATION | 2009年 / 247卷 / 1-3期
关键词：
Heavy metals; Adsorption; Endothermic; Meranti wood; Sawdust; HEAVY-METAL IONS; THERMODYNAMIC PARAMETERS; COPPER(II) IONS; EQUILIBRIUM; LEAD(II); SORPTION; ZINC; BIOSORPTION; KINETICS; CADMIUM;
D O I：
10.1016/j.desal.2009.01.007
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Meranti tree sawdust, an inexpensive material, is currently being investigated as an adsorbent for the removal of Cu(II) and Pb(II) ions from aqueous solutions. In this work, adsorption of Cu(II) and Pb(II) ions on Meranti tree sawdust has been studied by using batch techniques. The equilibrium adsorption level was determined to be a function of the solution of pH, contact time, and adsorbent dosage. Adsorption isotherms of Cu(II) and Pb(II) ions on adsorbents were determined and correlated with common isotherm equations such as Langmuir and Freundlich models. The thermodynamic parameters like free energy, enthalpy, and entropy changes for the adsorption of Cu(II) and Pb(II) ions have also been computed and discussed. The heat of adsorption [Delta H = 31.47 kJ/mol for Cu(II) and Delta H = 20.07 kJ/mol for Pb(II)] implied that the adsorption was endothermic in nature.
引用
收藏
页码：636 / 646
页数：11
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