Adsorption studies of zinc ions on barium titanate from aqueous solution

被引：13
|
作者：
Guin, R [1 ]
Das, SK [1 ]
Saha, SK [1 ]
机构：
[1] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Radiochem Lab, Kolkata 700064, W Bengal, India
来源：
RADIOCHIMICA ACTA | 2002年 / 90卷 / 01期
关键词：
adsorption; Zn-65; tracer; barium titanate; kinetics; activation energy; Freundlich isotherm;
D O I：
10.1524/ract.2002.90.1_2002.53
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Adsorption of Zn(II) ions on barium titanate has been studied as a function of concentration of Zn(II) (1.0 x 10(-5)-5.0 x 10(-7) M), temperature (281-313 K) and pH (4-8) of the adsorptive solution using Zn-65 tracer and gamma-ray spectroscopy. The adsorption process was found to obey the first order rate law and the Freundlich adsorption isotherm for the range of concentration studied. The uptake increases from 32 to 70% with the increase in dilution (from 1.0 x 10(-5) to 5.0 x 10(-7) M). The extent of adsorption also increases with increasing temperature and pH of solution. The activation energy for the process was determined to be 12.3 kJ mol(-1). The removal of Zn(II) ions by barium titanate appears to be endothermic and irreversible.
引用
收藏
页码：53 / 56
页数：4
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