Chromium (VI) biosorption properties of multiple resistant bacteria isolated from industrial sewerage

Environ Monit Assess. 2013 Aug;185(8):6809-18. doi: 10.1007/s10661-013-3066-x. Epub 2013 Jan 13.

Abstract

Chromium (VI) [Cr (VI)] biosorption by four resistant autochthonous bacterial strains was investigated to determine their potential for use in sustainable marine water-pollution control. Maximum exchange between Cr (VI) ions and protons on the cells surfaces were at 30-35 °C, pH 2.0 and 350-450 mg/L. The bacterial strains effectively removed 79.0-90.5 % Cr (VI) ions from solution. Furthermore, 85.3-93.0 % of Cr (VI) ions were regenerated from the biomasses, and 83.4-91.7 % of the metal was adsorbed when the biomasses was reused. Langmuir isotherm performed better than Freundlich isotherm, depicting that Cr (VI) affinity was in the sequence Rhodococcus sp. AL03Ni > Burkholderia cepacia AL96Co > Corynebacterium kutscheri FL108Hg > Pseudomonas aeruginosa CA207Ni. Biosorption isotherms confirmed that Rhodococcus sp. AL03Ni was a better biosorbent with a maximum uptake of 107.46 mg of Cr (VI) per g (dry weight) of biomass. The results highlight the high potential of the organisms for bacteria-based detoxification of Cr (VI) via biosorption.

MeSH terms

  • Bacteria / isolation & purification
  • Bacteria / metabolism*
  • Biodegradation, Environmental
  • Chromium / analysis
  • Chromium / metabolism*
  • Industry
  • Sewage / analysis
  • Sewage / microbiology*
  • Wastewater / chemistry
  • Wastewater / microbiology
  • Water Pollutants, Chemical / analysis
  • Water Pollutants, Chemical / metabolism*

Substances

  • Sewage
  • Waste Water
  • Water Pollutants, Chemical
  • Chromium