Removal of Hexavalent Chromium Using Novel Adsorbent Prepared from Wrightia tinctoria Fruits under Microwave Heating

S. Saminathan; M. Asaithambi; V. Sivakumar; P. Sivakumar

doi:10.14233/ajchem.2016.20019

Issue

Vol. 28 No. 11 (2016): Vol 28 Issue 11

Issue Published : August 10, 2016

This work is licensed under a Creative Commons Attribution 4.0 International License.

Removal of Hexavalent Chromium Using Novel Adsorbent Prepared from Wrightia tinctoria Fruits under Microwave Heating

https://doi.org/10.14233/ajchem.2016.20019

S. Saminathan

Department of Chemistry, Sakthi Polytechnic College, Sakthinagar, Erode-638 315, India

M. Asaithambi

Department of Chemistry, Erode Arts and Science College, Erode-638 009, India

V. Sivakumar

Department of Chemistry, Sri Vasavi College, Erode-638 316, India

P. Sivakumar

Department of Chemistry, A.A. Government Arts College, Namakkal-637 002, India

Corresponding Author(s) : S. Saminathan

ssaminathan91@gmail.com

Asian Journal of Chemistry, Vol. 28 No. 11 (2016): Vol 28 Issue 11
Article Published : August 11, 2016

Abstract

An activated carbon prepared from unripe fruits of Wrightia tinctoria by two-step microwave irradiation with optimum duration produces activated carbon with a surface area of 911 m²/g. The prepared activated carbon (WAC) utilized for the removal of hexavalent chromium from wastewater. Effect of pH indicates that maximum quantity of Cr(VI) can be removed at a pH of 2. The correlation coefficient calculated using pseudo-second order model varies between 0.9819 < r² < 0.9968 at different initial concentrations and it varies between 0.9888 < r² < 0.9938 at various temperatures depicts that pseudo-second order kinetic model is more appropriate to describe the adsorption than pseudo-first order model. The Freundlich model is more appropriate to explain the adsorption of Cr(VI) onto WAC when compared with Langmuir isotherm model with good correlation coefficient. The positive enthalpy of adsorption indicates the endothermic nature of adsorption with good spontaneity.

Keywords

Microwave Adsorption Kinetics Isotherm Effluent Surface area

Saminathan, S., Asaithambi, M., Sivakumar, V., & Sivakumar, P. (2016). Removal of Hexavalent Chromium Using Novel Adsorbent Prepared from Wrightia tinctoria Fruits under Microwave Heating. Asian Journal of Chemistry, 28(11), 2464–2470. https://doi.org/10.14233/ajchem.2016.20019

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References

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References

V.K. Gupta, D. Pathania, S. Sharma and P. Singh, J. Colloid Interf. Sci., 401, 125 (2013); doi:10.1016/j.jcis.2013.03.020.

M. Costa, Toxicol. Appl. Pharmacol., 188, 1 (2003); doi:10.1016/S0041-008X(03)00011-5.

L.V.A. Gurgel, J.C. Perin de Melo, J.C. de Lena and L.F. Gil, Bioresour. Technol., 100, 3214 (2009); doi:10.1016/j.biortech.2009.01.068.

J. Fang, Z.M. Gu, D.C. Gang, C.X. Liu, E.S. Ilton and B.L. Deng, Environ. Sci. Technol., 41, 4748 (2007); doi:10.1021/es061969b.

D. Mohan and C.U. Pittman Jr., J. Hazard. Mater., 137, 762 (2006); doi:10.1016/j.jhazmat.2006.06.060.

M. Ahmedna, W.E. Marshall, A.A. Husseiny, R.M. Rao and I. Goktepe, Water Res., 38, 1062 (2004); doi:10.1016/j.watres.2003.10.047.

T. Yang and A.C. Lua, J. Colloid Interf. Sci., 267, 408 (2003); doi:10.1016/S0021-9797(03)00689-1.

T. Zhang, W.P. Walawender, L.T. Fan, M. Fan, D. Daugaard and R.C. Brown, Chem. Eng. J., 105, 53 (2004); doi:10.1016/j.cej.2004.06.011.

U. Zielke, K.J. Huttinger and W.P. Hoffman, Carbon, 34, 983 (1996); doi:10.1016/0008-6223(96)00032-2.

M.J. Ahmed and S.K. Theydan, Chem. Eng. J., 214, 310 (2013); doi:10.1016/j.cej.2012.10.101.

ISI, Indian Standards Institute. IS-877 (1977).

APHA, American Public Health Association, Washington, D.C (1980).

A. Benhammou, A. Yaacoubi, L. Nibou and B. Tanouti, J. Hazard. Mater., 140, 104 (2007); doi:10.1016/j.jhazmat.2006.06.077.

S. Lagergren, Kung. Sven. Veten. Hand., 24, 1 (1898).

Y.S. Ho and G. McKay, Process Biochem., 34, 451 (1999); doi:10.1016/S0032-9592(98)00112-5.

U.K. Garg, M.P. Kaur, V.K. Garg and D. Sud, J. Hazard. Mater., 140, 60 (2007); doi:10.1016/j.jhazmat.2006.06.056.

I. Langmuir, J. Am. Chem. Soc., 40, 1361 (1918); doi:10.1021/ja02242a004.

H. Freundlich, Z. Phys. Chem., 57, 387 (1906).

A. Ozcan, E.M. Oncu and A.S. Ozcan, Colloids Surf. A, 277, 90 (2006); doi:10.1016/j.colsurfa.2005.11.017.

S. Arivoli, Ph.D., Thesis, Gandhigram Rural University, Gandhigram, India (2007).

Issue

Vol. 28 No. 11 (2016): Vol 28 Issue 11

Removal of Hexavalent Chromium Using Novel Adsorbent Prepared from Wrightia tinctoria Fruits under Microwave Heating

Corresponding Author(s) : S. Saminathan

Abstract

Keywords

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