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Publication Date:
July 2008
ISSN:
1934-2659
DOI:
10.2202/1934-2659.1209

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New Journal at De Gruyter!

Ed. by Sotudeh-Gharebagh, Rhamat / Mostoufi, Navid / Chaouki, Jamal

2 Issues per year

Studies of Chromium Removal from Tannery Effluents by Dead Streptomyces Rimosus

Mohamed Nasser Sahmoune / Krim Louhab / Aissa Boukhiar

1University of Boumerdes

1University of Boumerdes

1University of Boumerdes

Citation Information: Chemical Product and Process Modeling. Volume 3, Issue 1, Pages –, ISSN (Online) 1934-2659, DOI: 10.2202/1934-2659.1209, July 2008

Publication History:
Published Online:
2008-07-21

Dead streptomyces rimosus was found to be an effective biosorbent for the removal of chromium from industrial tanning effluents. A sorption level of 65 mg/g was observed at pH 4.8 while the precipitation effect augmented this value at a higher pH range. Chromium desorption increased with decreasing desorption agents pH (including HCl and H2SO4) to a maximum value of 95% at approximately zero pH. The biosorption data of trivalent chromium by streptomyces rimosus has been used for kinetic studies based on fractional power, Elovich, pseudo-first order and pseudo-second order rate expressions. The time-dependent Cr (III) biosorption data were well-described by a pseudo-second-order kinetic model. The intraparticle diffusion is not the rate-limiting step for the whole reaction. It was found that the biosorption equilibrium data fit well with the Langmuir model.

Keywords: biosorption; streptomyces rimosus; kinetic; uptake; chromium

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