Removal Of Zinc And Cadmium Ions From Contaminated Soils With Rhamnolipid Biosurfactant Produced By Pseudomonas Aeruginosa S7ps5
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Date
2016-09-01
Journal Title
Journal ISSN
Volume Title
Publisher
University of Eloued جامعة الوادي
Abstract
A soil treatment process using froth flotation technique involving anionic biosurfactant (rhamnolipids) using Sodium sulfide was studied. The supernatant produced by the strain Pseudomonas aeruginosa S7PS5 was tested for biosurfactants production, HPLC analysis showed the presence of L-rhamnosyl- β- hydroxydecanoyl- β-hydroxydecanoate (RL1) and L-rhamnosyl L-rhamnosyl- β-hydroxydecanoyl-β- hydroxydecanoate (RL2). The influence of the collector (rhamnolipid), pulp pH, a chemical activation step (sulfidization) and process time on metal removal efficiency has been investigated to recover Zn and Cd ions from a contaminated soil. An effective CMC of 35 mg/L was obtained. A perfect Zn and Cd removal efficiency was made at pH = 12 and 4 mg/g of Na2S during the first 5 min of soil washing process, then a longer flotation time ( > 5 min) caused mechanical entrainment of Zn and Cd.
Description
Article in Journal of Fundamental and Applied Sciences Vol 08, N 03
Keywords
Biosurfactants, flotation, Pseudomonas aeruginosa, rhamnolipids, soil washing.
Citation
Article in Journal of Fundamental and Applied Sciences Vol 08, N 03