@article{fdi:010070153,
  title = {{B}ioremediation of hexavalent and trivalent chromium using {C}itrobacter freundii : a mechanistic study},
  author = {{P}rabhakaran, {D}.{C}. and {R}iotte, {J}ean and {S}ubramanian, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he mechanisms involved in the bioremediation of hexavalent chromium ({C}r({VI})) and trivalent chromium ({C}r({III})) by a {G}ram negative bacterium, {C}itrobacter freundii were independently investigated. {T}he biosorption isotherms of {C}r({VI}) and {C}r({III}) for {C}. freundii exhibited a typical {L}angmuirian behaviour. {T}he {G}ibbs free energy (Δ{G}) was determined to be -25.5 and −27.2 k{J} mol−1, respectively for {C}r({VI}) and {C}r({III}), suggestive of chemisorption between the functional groups of bacterial surface and {C}r. {T}he relatively lesser amount of desorption of {C}r({VI}) or {C}r({III}) from the bacterial cells attested to the irreversible nature of biosorption. {FTIR} studies revealed the involvement of carboxyl, amino and hydroxyl groups in the biosorption of {C}r({VI}) and {C}r({III}). {X}-ray photoelectron spectroscopic studies provided evidence in support of the bioreduction from {C}r({VI}) to {C}r({III}). {E}lectrokinetic studies revealed that the bacterial cells become less electronegative after interaction with {C}r species. {T}he mechanisms of bioremediation have been delineated to involve both biosorption and bioreduction processes for {C}r({VI}), while for {C}r({III}), biosorption is the governing process of remediation.},
  keywords = {},
  booktitle = {},
  journal = {{N}atural {R}esources and {E}ngineering},
  volume = {1},
  numero = {1},
  pages = {1--12},
  year = {2016},
  DOI = {10.1080/23802693.2016.1215880},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070153},
}