Removal of arsenic from aqueous solution using polyaniline/rice husk nanocomposite

被引：32
|
作者：
Lashkenari, Mohammad Soleimani [1 ]
Davodi, Behzad [1 ]
Eisazadeh, Hossein [1 ]
机构：
[1] Babol Univ Technol, Dept Chem Engn, Babol Sar, Iran
来源：
KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2011年 / 28卷 / 07期
关键词：
Polyaniline; Rice Husk; Nanocomposite; Arsenic; Isotherm; METAL-IONS; ADSORPTION; POLYPYRROLE; DYES; KINETICS; WATER; EQUILIBRIUM; COMPOSITES; REDUCTION; BEHAVIOR;
D O I：
10.1007/s11814-011-0014-8
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The present study deals with the adsorption of arsenic ions from aqueous solution on polyaniline/rice husk (PAn/RH) nanocomposite. Batch studies were performed to evaluate the influence of various experimental parameters like pH, adsorbent dosage, contact time and the effect of temperature. Optimum conditions for arsenic removal were found to be pH 10, adsorbent dosage of 10 g/L and equilibrium time 30 minutes. Adsorption of arsenic followed pseudo-second-order kinetics. The equilibrium adsorption isotherm was better described by Freundlich adsorption isotherm model. The adsorption capacity (q(max)) of PAn/RH for arsenic ions in terms of monolayer adsorption was 34.48 mg/g. The change of entropy (Delta S-0) and enthalpy (Delta H-0) was estimated at -0.066 kJ/(mol K) and -22.49 kJ/ mol, respectively. The negative value of the Gibbs free energy (Delta G(0)) indicates feasible and spontaneous adsorption of arsenic on PAn/RH.
引用
收藏
页码：1532 / 1538
页数：7
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