Kinetics of adsorption of metal ions on inorganic materials: A review

来自学术范

喜欢 0

阅读量：

345

作者：

SS Gupta，KG Bhattacharyya

展开

摘要：

The review discusses the kinetics of adsorption of metal ions on inorganic solids based on publications of last ten years. Materials like clays and clay minerals, zeolites, silica gel, soil, activated alumina, inorganic polymer, inorganic oxides, fly ash, etc. have been used as sorbents for As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Se, and Zn. The majority of the interactions have been reported as following either pseudo first order or second order kinetics. Application of Elovich equation, intra-particle diffusion and liquid film diffusion kinetics has also been reviewed. The kinetic rate coefficients indicate the speed at which the metal ions are taken up by the materials. Second order plots for Cr(VI) adsorbed on natural and modified kaolinite (experimental conditions: adsorbent 2 g L − 1, Cr(VI) 50 mg L − 1, pH 4.6, and temperature 303 K). ► Kinetics of adsorption of metal ions on inorganic solids done during last ten years is reviewed. ► Clays, zeolites, silica gel, alumina, oxides, fly ash, etc., are considered as sorbents. ► Most interactions are reported as following pseudo first order or second order kinetics. ► Application of Elovich, intra-particle and liquid film diffusion models are also reviewed. ► The rate coefficients for sorption of metal ions on various materials are given and discussed.

展开

关键词：

Inorganic adsorbents Metal ions Kinetics Adsorption

DOI：

10.1016/j.cis.2010.12.004

被引量：

528

年份：

2011