@article{aees20219112,
author={{H.M, Nilofer Nisha and Kavitha, P.},
title={Chromium VI Detoxification by <i>P. fluorescens </i>Adopted from Tannery Effluent under Optimal Condition},
journal={Applied Ecology and Environmental Sciences},
volume={9},
number={1},
pages={79--82},
year={2021},
url={http://pubs.sciepub.com/aees/9/1/12},
issn={2328-3920},
abstract={The present study is aimed to isolate and evaluate chromium reduction by the indigenous bacterium <i>Pseudomonas</i><i> </i><i>fluorescens</i><i> </i>in tannery effluents collected from airport, Tiruchirappalli. Chromium resistant pattern was studied by plate method and reduction was studied by shake flask method. Isolate <i>Pseudomonas fluorescens </i>biochemically characterized as Gram negative siderophore producing bacteria and found to tolerate 1000 ppm Cr VI. Among the pH best growth was found at pH 6 showed Lag Growth phase was observed on 4 h at nonchromium condition and 6 h for chromium supplemented medium at 100 ppm and 7 h at 1000ppm. The growth was retreated by chromium but not arrested. The yield of the bio-surfactant was relatively higher in pH 8. Medium with yeast extract, pH 8 comparatively better than other nitrogen in chromium reduction. Maximum Chromium removal efficiency was 82% under chitosan and 78% by EDTA supplemented medium. Other nitrogen sources were less significant. In pH 8 under yeast extract and glucose with EDTA and 68% chromium reduction was noted without EDTA. Medium with chitosan showed enhanced reduction from 55 % to 88%. Other nitrogen sources like peptone, casein, ammonium nitrate showed 60-70% reduction in the presence of EDTA and reduction was reduced to 50% without EDTA. The increase of dextrose strength does not influence the reduction of chromium and maximum activity was found at 2% same as 10%.},
doi={10.12691/aees-9-1-12}
publisher={Science and Education Publishing}
}