Cr(VI) Removal from Wastewater by Using Rice Husk Ash (RHA)

https://doi.org/10.22146/ajche.50154

M. J. Uddin(1*), M. M.R. Khan(2), M S. Iftekhar(3), M A Islam(4)

(1) Department of Chemical Engineering and Polymer Science Shah Jalal University of Science and Technology Sylhet 3114, BANGL4DESH
(2) Department of Chemical Engineering and Polymer Science Shah Jalal University of Science and Technology Sylhet 3114, BANGL4DESH
(3) Department of Chemical Engineering and Polymer Science Shah Jalal University of Science and Technology Sylhet 3114, BANGL4DESH
(4) Department of Chemical Engineering and Polymer Science Shah Jalal University of Science and Technology Sylhet 3114, BANGL4DESH
(*) Corresponding Author

Abstract


Rice husk ash (RHA) was studied as a potential adsorbent for Chromium (VI)removal from wastewater. RHA was able to remove effectively and economically toxic metal from synthetic wastewater. Experiments were done on the removal of Cr(VI) from dichromate solution which is a form of chromium in tannery effluent. The amount of Cr(VI) adsorption increased with the decrease in pH. The optimum parameter was = 2.0 evaluated at pH and the dose rate of the adsorbent was 5 kg RHNm3. The equilibrium data fit well in both the Langmuir and Freundlich isotherms. The study showed that 89.29 x 10-3kg Cr(VI) could be removed by 1 Kg of RHA. Since rice husk (RH) is available and cheap in Bangladesh, it can be used easily as an appropriate adsorbent to remove more than 95% Cr(VI) from tannery wastewater.

Keywords


Adsorption, chromium (IV),isotherms, rice husk ash (RHA), tannery effluent, wastewater, and water pollution.

Full Text:

PDF


References

  1. Babel, S., Kurniawan,T. A, Namasivayam, C., and Ranganathan, K. (1999). "Cr(VI) removal from synthetic waste water using coconut shell charcoal and commercial activated carbon modifiedwith oxidizing agents and/or chitosan," Chem. Eng. Process.,54, 951-967.
  2. Gang, D., Banerji, S. K., and Clevenger,T. E. (1999). Chromium(VI) removal by modified Conference PVP-coated on Hazardous silica gel. Waste The Research, Columbia.
  3. McKay,G., Ottebur, M. S., and Sweeny, A G. (1980). "The removal of color from effluent using various adsorbents," J. WaterRes., 14,15.
  4. Namasivayam, C., and Vamuna, R T. (1992). "Removal of Congo red from aqueous solution by biogas waste slurry," Indian J. Chem. Technol,53, 153.
  5. Rahman, M. S, Islam,M. A, (1999).Removal of Congo red from textile waste water,B.Sc. in Engineering Thesis, Department of Chemical Engineering and Polymer Science,Shah Jalal Universityof Science and Technology,Sylhet3114, Bangladesh.
  6. Randall,J. M., Hautala, E., and McDonald,G. (1973). "Removal of Cupric ion from solution by contact with peanut skin,"J. Appl Po/ym. Sci., 19, 1563.
  7. Rivero, M. J., Primo, Oscar M., and Ortiz,I. (2004). "Modelling of Cr(VI) removal from polluted groundwaters by ion exchange," J. Chem. Techno/. Biotechnol, 79, 822-829.
  8. Schmuhl, R., Krieg,H. M., and Keizer,K. (2001). "Adsorptionof Cu(lI)and Cr(VI)ionsby chitosan: Kinetics and equilibrium studies," Water5 A, 27, 1.
  9. Udaybhaskar, P., Iyengar, L., and Prabhakara, R. A (1990). "Hexavalent chromium interaction with chitosan," J. App/. Po/ym. Sci., 39, 739-747.



DOI: https://doi.org/10.22146/ajche.50154

Article Metrics

Abstract views : 1681 | views : 1227

Refbacks

  • There are currently no refbacks.


ASEAN Journal of Chemical Engineering  (print ISSN 1655-4418; online ISSN 2655-5409) is published by Chemical Engineering Department, Faculty of Engineering, Universitas Gadjah Mada.