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G. Sibi. Biosorption of chromium from electroplating and galvanizing industrial effluents under extreme conditions using Chlorella vulgaris. Green Energy&Environment, 2016, 1(2): 172-177. doi: 10.1016/j.gee.2016.08.002
Citation: G. Sibi. Biosorption of chromium from electroplating and galvanizing industrial effluents under extreme conditions using Chlorella vulgaris. Green Energy&Environment, 2016, 1(2): 172-177. doi: 10.1016/j.gee.2016.08.002
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Biosorption of chromium from electroplating and galvanizing industrial effluents under extreme conditions using Chlorella vulgaris

doi: 10.1016/j.gee.2016.08.002

  • Department of Biotechnology, Indian Academy Degree College, Centre for Research and Post Graduate Studies, Bengaluru 560 043, Karnataka, India

  • Received date 28 June 2016, Accepted date 23 August 2016, RevRecd date 10 August 2016, Available online 31 August 2016, Publish date 31 July 2016,
    Abstract
  • Hexavalent chromium [Cr(VI)] is a toxic oxidized form and an important metal pollutant in the water bodies. Biosorption of chromium(VI) offers a potential alternative to conventional metal removal methods. Dried biomass ofChlorella vulgaris was used as biosorbent for the removal of Cr(VI) from electroplating and galvanizing industry effluents as a function of biosorbent dosage, contact time, pH, salinity and initial metal ion concentration. Batch experiments were conducted for biosorption and the optimum conditions were 1 g/L biomass, 4 h contact time, pH 2 and 2.893 mS/cm of electrical conductivity. The chromium biosorption was strictly pH dependent with a maximum Cr removal of 63.2 mg/L at pH 2. Highest Cr removal at a concentration of 81.3 mg/L was observed at Electrical conductivity (EC) value of 2.893 mS/cm. A comparison of Langmuir and Freundlich isotherm models revealed that Freundlich isotherm model fitted the experimental data based on R 2, qmax and standard error values. The results suggest that C. vulgaris biomass could be considered a promising low-cost biosorbent for the removal of Cr(VI) from electroplating and galvanizing industry effluents.

     

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