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Biosorption of Chromium (VI) from Industrial Effluent using Neem Leaf Adsorbent

Author Affiliations

  • 1Department of Chemical Engineering, Coimbatore Institute of Technology, Coimbatore –14, Tamil Nadu, INDIA

Res.J.chem.sci., Volume 3, Issue (4), Pages 48-53, April,18 (2013)


Industrial water pollution is a potential threat to human health mainly because of the non-biodegradable, hazardous heavy metals. Among these heavy metals chromium is of considerable concern. Various methods adopted for removal of heavy metals include chemical precipitation, membrane separation, ion exchange and adsorption. In case of adsorption, the generally used adsorbents like activated carbon, silica, alumina, etc. are expensive. This has prompted the use of natural materials as adsorbents in order to develop cheaper alternatives, which can be disposed off without regeneration due to their lower cost. Azadirachta indica leaf powder is tried for the removal of chromium. The newly developed adsorbents should be as effective as the conventional ones. Hence in the present work, Azadirachta indica (Neem) leaf powder is studied for their adsorptive capacity to remove chromium (VI) from aqueous solution. The equilibrium studies are systematically carried out in a batch process covering various process parameters that include agitation time, adsorbent dosage, temperature and initial concentration of chromium. The adsorption behavior is finding to follow the Freundlich Adsorption Isotherm.


  1. Donmez G. and Aksu Z., Removal of chromium (VI) from wastewaters by Dunaliella species, Process Biochemistry, 38(5), 751–762 (2002)
  2. Hu Z., Lei L., Li Y. and Ni Y., Chromium adsorption on high performance activated carbon from aqueous solution, Separation and Purification Technology, 31(1), 13–18 (2003)
  3. Lotfi M. and Adhoum N., Modified activated carbon for the removal of copper, zinc, chromium and cyanide from wastewater, Separation and Purification Technology, 26(2–3), 137–146 (2002)
  4. Rao M.M., Ramesh A., Rao G.P.C. and Seshaiah K., Removal of copper and cadmium from the aqueous solutions by activated carbon derived from Ceibapentandra hulls, J. Hazard. Mater, 129, 123-129 (2006)
  5. Sharma D.C. and Forster C.F., Removal of hexavalent chromium using sphagnum moss peat, Water Research, 27, 1201–1208 (1993)
  6. Ozer A., Altundogan H.S., Erdem M. and Tunmen F., A study on the Cr (VI) removal from aqueous solutions by steel wool, Environmental Pollution, 97(1–2), 107–112 (1997)
  7. Mauri R., Shinnar R., Amore M.D., Giordano P. and Volpe A., Solvent extraction of chromium and cadmium from contaminated soils, American Institute of Chemical Engineers Journal (AIChE), 47(2), 509512 (2001)
  8. Padilla A. and Tavani E.L., Treatment of an industrial effluent by reverse osmosis, Desalination, 129(1–3), 219–226 (1999)
  9. Dakiky M., Khami A., Manassra A. and Mer’eb M., Selective adsorption of chromium (VI) in industrial wastewater using low cost abundantly available adsorbents, Advances in Environmental Research, 6(4), 533–540 (2002)
  10. Panday K.K., Prasad G. and Singh V.N., Removal of chromium from aqueous solution by adsorption on fly ash wollostonite, Journal of Chemical Technology and Biotechnology, 34, 367–374 (1984)
  11. Srivastava S.K., Tyagi R. and Pant N., Adsorption of heavy metal ions on carbonaceous material developed from the waste slurry generated in local fertilizer plant, Water Research, 23, 1161–1165 (1989)
  12. Namasivayam C. and Rangnathan K., Waste Fe (III)/Cr (III) hydroxide adsorbent for the removal of Cr (VI) from aqueous solution and chromium plating industry wastewater, Environmental Pollution, 82, 255–261(1993)
  13. Patnaik L.N. and Das C.P., Removal of hexavalent chromium by blast furnace flue dust, Indian Journal of Environmental Health, 37, 19–25 (1995)
  14. Selvaraj K., Chandramohan V. and Pattabhi S., Removal of Cr (VI) from solution and chromium plating industry wastewater using photo film waste sludge, Indian Journal of Chemical Technology, 18, 641–646 (1997)
  15. Rawat N.S. and Singh C.D., Removal of Cr (VI) on bituminous coal’, Asian Environment, 14, 30–41 (1992)
  16. Sharma D.C. and Forster C.F., A preliminary examinations into the adsorption of hexavalent chromium using low cost adsorbents, Bio resource Technology, 47, 257–264 (1994)
  17. Tan W.T., Ooi S.T. and Lee C.K., Removal of Cr (VI) from solution by coconut husk and palm pressed fiber, Environmental Technology, 14, 277 (1993)
  18. Dikshit V.P., Removal of chromium (VI) by adsorption using sawdust’, National Academy of Science Letters, 12(12), 419–421 (1989)
  19. Selvaraj K., Manonmani S. and Pattabhi S., Removal of hexavalent chromium using distillery sludge, Bio resource Technology, 89(2), 207–211 (2003)
  20. Veeraswamy R., Venkateswaren V., Kulandaivelu A.R., Basic Principles of Practical Chemistry, S. Chand Publisher (2007)
  21. Febrianto J. Kosasib A.N. Sonarso J., Ju Y.H., Indraswati N. and Ismadji S., Equilibrium and kinetic studies in adsorptions of heavy metals using biosorbents, A summaruy of recent studies, J. Hazard. Matter,162, 616–645 (2008)
  22. Reddy D.H.K., Seshaiah K., Reddy A.V.R., M.M., Wang M.C., Bio sorption of pb2+ from aqueous solution by moringa oleifera bark: Equilibrium and kinetics studies, J. Hazard matter,174, 831–838 (2010)