Dynamic and equilibrium studies on adsorption of Cr(VI) ions onto binary bio-polymeric beads of cross linked alginate and gelatin

被引：120

作者：

Bajpai, J ^{[1
]}

Shrivastava, R ^{[1
]}

Bajpai, AK ^{[1
]}

机构：

[1] Govt Autonomous Sci Coll, Bose Mem Res Lab, Dept Chem, Jabalpur 482001, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2004年 / 236卷 / 1-3期

关键词：

chromium(VI); adsorption; kinetics; alginate; gelatin; beads;

D O I：

10.1016/j.colsurfa.2004.01.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Static and dynamic adsorption studies of Cr(VI) have been undertaken at fixed pH and ionic strength taking binary bio-polymeric beads of cross linked alginate and cross linked gelatin as adsorbents. The adsorption data were applied to Langmuir and Freundlich isotherm equations and various static parameters were calculated. The dynamic nature of adsorption was quantified in terms of several kinetic constants such as rate constants for adsorption (k(l)), Lagergreen rate constant (k(ad)), interparticle diffusion rate constant (k(p)) and pore diffusion coefficient (D). The influence of various experimental parameters such as solid to liquid ratio, pH, temperature, presence of salts and chemical composition of bio-polymeric beads were investigated on the adsorption of dichromate ion. Various thermodynamic parameters were also calculated. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：81 / 90

页数：10

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