吸附
水溶液
傅里叶变换红外光谱
化学
吸附
烯烃
核化学
水溶液中的金属离子
无机化学
氧化物
离子
有机化学
化学工程
催化作用
工程类
作者
Biswajit Singha,Tarun Kumar Naiya,Ashim Kumar Bhattacharya,Sudip Das
出处
期刊:Journal of Environmental Protection
[Scientific Research Publishing, Inc.]
日期:2011-01-01
卷期号:02 (06): 729-735
被引量:64
标识
DOI:10.4236/jep.2011.26084
摘要
The ability of eight natural adsorbents were investigated for adsorptive removal of Cr(VI) from aqueous solutions.Various physico-chemical parameters such as pH, initial metal ion concentration, adsorbent dose level and equilibrium contact time were optimized in batch adsorption technique.A detailed Fourier Transform Infrared spectra (FTIR) study of adsorbents and Cr(VI) loaded adsorbents at the optimized condition was carried out to identify the different functional groups that were responsible for the adsorption.The important functional groups like hydroxyl, alkene, aromatic nitro, carboxilate anion, silicon oxide, sulphonic acid etc. were present in the natural adsorbent and were responsible for the chemical adsorption of Cr(VI) from aqueous solutions.The sorption energy calculated from Dubinin-Radushkevich isotherm indicated that the adsorption process were chemical in nature.
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