Removal of hexavalent chromium by an aromatic alcohol

Ankita Basu, Rumpa Saha, Jayashree Mandal, Sumanta Ghosh, Bidyut Saha

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DOI: 10.4236/jbise.2010.37098                

Abstract

Cr(VI) is a widespread environmental contaminant and a known human carcinogen. Biosorption is a very common method to remove toxic Cr(VI) from industrial waste water. In biosorption Cr(VI) is reduced to less toxic Cr(III) and adsorbed in biosorbent as Cr(III). Effective biosorbents contain hydroxy groups; it may be aliphatic or aromatic. Kinetics of reduction of Cr(VI) by an aromatic alcohol, benzyl alcohol, (which is an important volatile component of flowers of some night blooming plants) in micellar media have been studied spectrophotometrically. Micellar media is a probe to establish the mechanistic paths of reduction of Cr(VI) to Cr(III). Effects of electrolytes are studied to support the proposed reaction mechanism. Suitable surfactant & suitable concentration of electrolyte enhance the biosorption property.

Keywords

Biosorption; Carcinogen; Kinetics; Chromium (VI); Benzyl Alcohol; Non Functional Surfactants; Salt Effect

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Nriagu, J.O. and Nieboer, E., Eds. (1988) Chromium in the natural and human environments. Advances in Environmental Science and Technology. John Willey and Sons, New York, 20, 1-501.
[2]	Sorahan, T., Burges, D.C., Hamilton, L. and Harrington, J.M. (1998) Lung cancer mortality in nickel/chromium plates. Occupational and Environmental Medicine, 55(4), 236-242.
[3]	Mancuso, T.F. (1997) Chromium as an industrial carcin ogen. American Journal of Industrial Medicine, 31(2), 129-139.
[4]	Langardt, S. (1990) One hundred years of chromium and cancer: A review of epidemiological evidence and selected case reports. American Journal of Industrial Medicine, 17(2), 189-214.
[5]	Ahluwalia, S.S. and Goyal, D. (2007) Microbial and plant derived biomass for removal of heavy metals from wastewater. Bioresource Technology, 98(12), 2243-2257.
[6]	Volesky, B. and Holan, Z.R. (1995) Biosorption of heavy metals. Biotechnology Progress, 11(3), 235-250.
[7]	Park, D., Yun, Y.S., Kim, J.Y. and Park, J.M. (2008) How to study Cr (VI) biosorption: Use of fermentation waste for detoxifying Cr (VI) in aqueous solution. Chemical Engineering Journal, 136, 173-179.
[8]	Shaver, T.N., Lingren, P.D. and Marshall, H.F. (1997) Nighttime variation in volatile content of flowers of the night blooming plant, Gaum drummondii. Journal of Chemical Ecology, 23(12), 2673-2682.
[9]	Nkpwatt, D.A., Krimm, U., Coiner, H.A., Schreiber, L. and Schwab, W. (2006) Plant volatiles can minimize the growth suppression of epiphytic bacteria by the phytopa thogenic fungus Botrytis cinerea in co-culture experiments. Environmental and Experimental Botany, 56(1), 108-119.
[10]	Das, A.K., Roy, A., Saha, B., Mohanty, R.K. and Das, M. (2001) Micellar effect on the reaction of Chromium (VI) oxidation of D-fructose in the presence and absence of picolinic acid in aqeous media: A kinetic study. Journal of Physical Organic Chemistry, 14(3), 333-342.
[11]	Bayen, R., Islam, M., Saha, B. and Das, A.K. (2005) Oxidation of D-glucose in the presence of 2,2’-bipyridine by CrVI in aqueous micellar media: a kinetic study. Carbohydrate Research, 340(13), 2163-2170.
[12]	Islam, M., Saha, B. and Das, A.K. (2005) Kinetics and mechanism of 2,2’-bipyridyl and 1,10-phenanthroline catalysed chromium(VI) oxidation of d-fructose in aqueous micellar media. Journal of Molecular Catalysis A: Chemical, 236(1-2), 260-266.
[13]	Islam, M., Saha, B. and Das, A.K. (2006) Chromic acid oxidation of hexitols in the presence of 2,2’-bipyridyl catalyst in aqueos micellar media: a kinetic study. International Journal of Chemical Kinetics, 38(9), 531-539.
[14]	Islam, M., Saha, B. and Das, A.K. (2007) Kinetics and mechanism of picolinic acid promoted chromic acid oxidation of maleic acid in aqueous micellar media. Journal of Molecular Catalysis A: Chemical, 266(1-2), 21-30.
[15]	Saha, B., Sarkar, S. and Choudhury, K.M. (2008) Micellar effect of quinquivalent vanadium ion oxidation of D-glucose in aqueous acid media: a kinetic study. International Journal of Chemical Kinetics, 40(5), 282-286.
[16]	Choudhury, K.M., Mandal, J. and Saha, B. (2009) Micellar catalysis of Chromium (VI) oxidation of ethane-1, 2-diol in presence and absence of 2,2’-bipyridine in aqueos acid media. Journal of Coordination Chemistry, 62(11), 1871-1878.
[17]	Ghosh, S.K., Basu, A., Paul, K.K. and Saha, B. (2009) Micelle catalyzed oxidation of propan-2-ol to acetone by penta-valent vanadium in aqueous acid media. Molecular Physics, 107(7), 615-619.
[18]	Vogel, A.I. (1958) Elementary practical organic chemistry, Part-III, quantitative organic analysis, ELBS and Longman Group Ltd., London, p. 739.
[19]	Bunton, C.A. and Cerichelli, G. (1980) Micellar effects upon electron transfer from ferrocenes. International Journal of Chemical Kinetics, 12(8), 519-533.
[20]	Menger, F.M. and Portnoy, C.E. (1967) Chemistry of reactions proceeding inside molecular aggregates. Journal of the American Chemical Society, 89(18), 46984703.
[21]	Bunton, C.A. (1979) Reaction kinetics in aqueous surfactant solutions. Catalysis Reviews Science and Engineering, 20(1), 1-56.
[22]	Morawetz, H. (1969) Catalysis and inhibition in solutions of synthetic polymers and in micellar solutions. Advances in Catalysis & Related Subjects, 20, 341-371.
[23]	Cordes, E.M. and Dunlop, R.B. (1969) Kinetics of organic reactions in micellar systems. Accounts of Chemical Research, 2(11), 329-337.
[24]	Fendler, E.J. and Fendler, J.H. (1971) Micellar catalysis in organic reactions: Kinetic and mechanistic implications. Advances in Physical Organic chemistry, 76, 271406.
[25]	Bunton, C.A., Minch, M. and Sepulveda, L. (1971) Enhancement of micellar catalysis by added electrolyte. Journal of Physical Chemistry, 76(2), 2707-2709.
[26]	Das, A.K. (2004) Micellar effect on the kinetics and mechanism of chromium (VI) oxidation of organic substrates. Coordination Chemistry Review, 248(1-2), 81-99.
[27]	Mysels, K.J. and Princen, L.H. (1957) Light scattering by ideal colloidal electrolyte. Journal of Colloid Science, 12(6), 594-605.
[28]	Shinoda, K. (1955) The critical micellar concentrations in aqueous solutions of potassium alkyl malonates. Journal of Physical Chemistry, 59(5), 432-435.