A radiotracer study of the adsorption behavior of aqueous Ba2+ ions on nanoparticles of zero-valent iron

被引：217

作者：

Celebi, O.

Uezuem, C.

Shahwan, T. ^{[1
]}

Erten, H. N.

机构：

[1] Izmir Inst technol, Dept Chem, TR-34530 Izmir, Turkey

[2] Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 148卷 / 03期

关键词：

nano-zero-valent iron; barium; adsorption;

D O I：

10.1016/j.jhazmat.2007.06.122

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Recently, iron nanoparticles are increasingly being tested as adsorbents for various types of organic and inorganic pollutants. In this study, nanoparticles of zero-valent iron (NZVI) synthesized under atmospheric conditions were employed for the removal of Ba2+ ions in a concentration range 10(-3) to 10(-6) M. Throughout the study, Ba-133 was used as a tracer to study the effects of time, concentration, and temperature. The obtained data was analyzed using various kinetic models and adsorption isotherms. Pseudo-second-order kinetics and Dubinin-Radushkevich isotherm model provided the best correlation with the obtained data. Observed thermodynamic parameters showed that the process is exothermic and hence enthalpy-driven. (C) 2007 Elsevier B.V. All rights reserved.

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收藏

页码：761 / 767

页数：7

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