A comparative
study on the removal and recovery of hexavalent chromium from tannery wastewater
using an isolated strain Aspergillus proliferans LA and a known strain Aspergillus
terreus
Shukla Abhimati and Singh Lalit Kumar
Res. J. Chem. Environ; Vol. 27(11); 97-109;
doi: https://doi.org/10.25303/2711rjce0970109; (2023)
Abstract
Isolation of a potent microorganism from the soil near tanneries and a comparative
analysis of the removal and recovery of different concentrations of hexavalent chromium
using known strain Aspergillus terreus and isolated strain Aspergillis proliferansLA
are done. The isolated fungal species from the chromium contaminated soil sites
located in the industrial area of Kanpur, U.P. were tested for its potential for
the removal of hexavalent chromium from wastewater streams. The experiments were
conducted comparing the biosorption efficiency of the isolated species Aspergillus
proliferansLA and Aspergillus terreus by varying the initial Cr (VI) concentration
and media constituents.
The highest removal efficiency of 99.19% was shown by the isolated species Aspergillus
proliferansLA for an initial Cr (VI) concentration of 10ppm followed by increasing
the concentration to 50ppm whereas Aspergillus terreus showed 78.43% removal of
hexavalent chromium. This was then followed by desorption using 0.8M NaOH and 75.12%
hexavalent chromium was desorbed from the cells. The isolated strain Aspergillus
proliferansLA was seen to show better removal and recovery results than the known
strain Aspergillus terreus.
