title: Chromium (VI) biosorption properties of multiple resistant bacteria isolated from industrial sewerage.
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.
authors: Department of Microbiology, University of Lagos, Akoka, Yaba, Lagos, Nigeria. goyetibo@unilag.edu.ng
authors: Ganiyu Oladunjoye
authors: GO
authors: Oyetibo
authors: Matthew Olusoji
authors: MO
authors: Ilori
authors: Oluwafemi Sunday
authors: OS
authors: Obayori
authors: Olukayode Oladipo
authors: OO
authors: Amund
mesh_terms: D001419:Bacteria / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002857:Chromium / Q000032:analysis / Q000378:metabolism*; D007221:Industry; D012722:Sewage / Q000032:analysis / Q000382:microbiology*; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D002857:Chromium; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical