Adsorption potential of lead(II) ions from aqueous solutions onto Capsicum annuum seeds

被引：20

作者：

Ozcan, A. Safa ^{[1
]}

Ozcan, Adnan

Tunali, Sibel

Akar, Tamer

Kiran, Ismail

Gedikbey, Tevfik

机构：

[1] Anadolu Univ, Fac Sci, Dept Chem, TR-26470 Eskisehir, Turkey

[2] Eskisehir Osmangazi Univ, Fac Arts & Sci, Dept Chem, Eskisehir, Turkey

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2007年 / 42卷 / 01期

关键词：

agricultural by-products; adsorption; heavy metals; isotherm; kinetics; Capsicum annuum seeds;

D O I：

10.1080/01496390600956977

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The purpose of this work was to evaluate the adsorption potential of Capsicum annumn seeds, in a batch system for the removal of lead(H) ions from aqueous solutions. The experimental results showed that this agricultural by-product was effective in removing lead(H) ions. The FT-IR analysis indicated that the mechanism involved in adsorption of lead(H) ions by seeds of C. annuum was mainly attributed to lead(H) binding of amino and hydroxyl groups. Adsorption equilibrium approached within 40 min. The adsorption data fitted well to the Langmuir isotherm model. The maximum adsorption capacity (q(max)) was 1.87 x 10(-4) mol g(-1). Pseudo-second-order kinetic model was applicable to all the adsorption data over the entire time range. The thermodynamic parameters indicated that the adsorption process is spontaneous since Gibbs free energy values are negative, which are between -26.92 and -30.77 kJ mol at the temperature range of 20-50 degrees C.

引用

页码：137 / 151

页数：15

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