Modeling of chromium (VI) biosorption by immobilized Spirulina platensis in packed column

被引：73

作者：

Gokhale, S. V. ^{[1
]}

Jyoti, K. K. ^{[1
]}

Lele, S. S. ^{[1
]}

机构：

[1] Deemed Univ, Dept Food Engn & Technol, Inst Chem Technol, Bombay 400019, Maharashtra, India

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 170卷 / 2-3期

关键词：

Immobilization; Spirulina; Biosorption; Chromium (VI); Packed bed column; Modeling; HEAVY-METAL BIOSORPTION; CA-ALGINATE; CR VI; EQUILIBRIUM; REMOVAL; BIOMASS; IONS; NICKEL(II); ADSORPTION; VULGARIS;

D O I：

10.1016/j.jhazmat.2009.05.005

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study describes biosorption of chromium (VI) by immobilized Spirulina platensis, in calcium alginate beads. Three aspects viz optimization of bead parameters. equilibrium conditions and packed column operation were studied and subsequently modeled. Under optimized bead diameter (2.6 mm), calcium alginate concentration (2%, w/v) and biomass loading (2.6%, w/v) maximum biosorption was achieved. 1140 g l(-1) loading of optimized beads resulted in 99% adsorption of chromium (VI) ions from an aqueous solution containing 100 mg l(-1) of chromium (VI). The quantitative chromium (VI) uptake was effectively described by Freundlich adsorption isotherm. The immobilized S. platensis beads were further used in a packed bed column wherein the effects of bed height, feed flow rate, inlet chromium (VI) ion concentration were studied by assessing breakthrough time. The performance data were tested for various models fitting in order to predict scale up-design parameters such as breakthrough time and column height. Results were encouraging. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：735 / 743

页数：9

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