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Articles by Kokab Batool Naqvi
Total Records ( 1 ) for Kokab Batool Naqvi
  Ali Abbas Qazilbash , Rani Faryal , Kokab Batool Naqvi , Safia Ahmad and Abdul Hameed
  This study was designed to ascertain the effectiveness of isolated indigenous Bacillus species to remove chromium from industrially polluted effluents, through a series of effluent biotreatment regimen. Using microbiological techniques, 6 Bacillus strains were isolated, characterized and labeled QIP 1-6. All strains displayed maximum growth on media with a Cr concentration of 400 ppm. Strains QIP 1 and 5 showed maximum resistance to chromium showing moderate growth at 900 ppm of Cr. Following optimization, strain QIP 1 removed 46.81% of the Cr6+ and QIP 5 removed 42.50% of the chromium at the same concentration over the same incubation period, as determined through atomic absorption spectroscopy. Following different biotreatment regimens, biotreatment C1-filtered effluent inoculated with strain QIP 1, incubated under optimum conditions, showed maximum Cr6+ removal (10.29%) after 48 h. Interestingly, the second highest removal of Cr6+ (8.94%) occurred in the untreated, unfiltered raw effluent (D) after incubation for 48 h. Significant (p<0.05) strong positive correlation patterns emerged between these two regimen, as well as between regimen B 1-filtered effluent inoculated with strain QIP 1, but incubated under un-optimized conditions-and regimen D. The study revealed that intrinsic bioremediation does occur naturally and that it is quite possible for a consortium of Bacillus species to work more effectively at removing the HM from the contaminated sites, than a single isolate, thereby reducing the labor intensive work involved.
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