Journal article
Suitability of Immobilized Pseudomonas fluorescens SM1
Strain for Remediation of Phenols, Heavy Metals,
and Pesticides from Water

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Publication Details
Author list: Samina Wasi & Shams Tabrez & Masood Ahmad
Publication year: 2011
Volume number: 220
Start page: 89
End page: 99
Number of pages: 11
Web of Science ID:
PubMed ID:
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biological treatment have the potential to degrade toxic
chemicals faster than conventional wastewater treatment systems. In the present study, suitability of
immobilized Pseudomonas fluorescens SM1 strain
in calcium alginate beads for remediation of the
major toxicants in Indian water bodies was tested by
means of GC/HPLC and AAS techniques. Roughly
80% reduction in the concentration of phenols was
observed by immobilized SM1 cells compared with
60% by the free cells. Also, in the case of the
bioremediation of heavy metals, immobilized SM1
cells were found to be more efficient compared with
the free cells. Suspension of P. fluorescens SM1 cells
in the test model water for 24 h brought down the
concentrations of Cu++, Cd++, Ni++, and Pb++ by
more than 75% under free cell state and 7–9% better
efficiency under the immobilized conditions. However, Cr(VI) could show only 44% removal by the
cell immobilized system, whereas a mere 35%
reduction in the Cr(VI) levels was shown in the test
model water by the free SM1 cells under the same
conditions. Moreover, a model water containing
2,000 ppb of BHC, 1,248 ppb mancozeb, and
312 ppb 2,4-D passed through the cell immobilized
column resulted in the decline in their concentrations
up to 362 ppb, 750 ppb, and 126 ppb, respectively.
Generally, AAS, HPLC, and GC analyses of treated
test model waters with the free and immobilized
SM1 cells exhibited high potential of immobilized
SM1 in detoxification of test water. From the results,
we conclude that immobilized cells of P. fluorescens
SM1 strain were quite effective in bioremediation of
major toxicants present in Indian water bodies, and
we also recommend the use of immobilized bacterial
cells rather than the free cells for the bioremediation/
detoxification process.
Keywords Immobilized cells . Alginate beads. Model
water. Pseudomonas fluorescens SM1 . GC . HPLC .

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Last updated on 2021-13-10 at 22:59