| Autor: |
Krim Louhab, Aissa Boukhiar, Mohamed Nasser Sahmoune |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Chemical Product and Process Modeling. 3 |
| ISSN: |
1934-2659 |
| DOI: |
10.2202/1934-2659.1209 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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