Reduction of Metal Contents in Coal Stockpile Wastewater Using Electrocoagulation

Abstract:

Stockpile wastewater consisted of ferrous metal, manganese metal and total suspended solid (TSS). In addition, it also has high acidity (pH) which is possibly harmful to the environment. This research objectives were to reduce ferrous and manganese metal in coal stockpile wastewater using electrocoagulation technique using aluminum electrode with variation in electrics current and processing time. The most effective conditions in reducing ferrous and manganese concentrations with electric current of ± 2.5 A in 90 minutes. Effectivity in ferrous and manganese metal reduction was 98.7% and 99.6%, respectively. The final concentration of ferrous and manganese metal was 0.08 mg/L and 0.01 mg/L respectively. Optimum concentration of TSS reduction was 83.7% with the final concentration of 72 mg/L. The wastewater pH value became 7,1. Finally, the results demonstrated that the electrocoagulation process using aluminium electrode is a reliable technique for removal of pollutants from coal stockpile wastewater.

• Periodical: Applied Mechanics and Materials (Volume 391)
• Pages: 29-33
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.391.29
• Online since: September 2013
• Authors: Rusdianasari Bow, Susila Arita, Eddy Ibrahim, Ngudiantoro Ngudiantoro
• Keywords: Coal Stockpile, Electrocoagulation, Reduction, Wastewater

References

[1] Arif, T., and Said, M: Needs Analysis of Coal and Gas in South Sumatra in Supporting Resource Management Environmental Energy as One source revenue (PAD) Sumatra. Journal of Human Development, 5th ed. (2009).

[2] U. Tezcan Un, A.S. Koparal, and U. Bakir: Hybrid Processes for the Treatment of Cattle-slaughterhouse Wastewater using Aluminium and Iron Electrodes, Journal of Hazardous Material, Vol. 164, No. 2-3 (2009), pp.580-586.

DOI: 10.1016/j.jhazmat.2008.08.045

[3] U. Tezcan Un, A.S. Koparal, and U. Bakir: Electrocoagulation of Vegetable Oil Refinery Wastewater using Aluminium Electrodes, Journal Management, Vol. 90, No. 1 (2009), pp.428-433.

DOI: 10.1016/j.jenvman.2007.11.007

[4] S. Tchamango, C.P. Nanseu-Njiki, E. Ngamemi, D. Hadjiev, and A. Darchen: Treatment of Dairy Effluents by Electrocoagulation using Aluminium Electrodes. Science of the Total Environment, Vol. 408, No. 4 (2010), pp.947-952.

DOI: 10.1016/j.scitotenv.2009.10.026

[5] J. Nouri, A. H. Mahvi, and E. Bazrafshan: Application of Electrocoagulation Process in Removal of Zinc and Copper from Aqueous Solutions by Aluminium Electrodes, International Journal of Environmental Research, Vol. 4, No. 2 (2010), pp.201-208.

[6] E. Bazrafshan, K.A. Ownagh, and A. H. Mahvi: Application of Electrocoagulation process Using Iron and Aluminium Electrodes for Fluoride Removal from Aqueous Environment, E-Journal of Chemistry, Vol. 9, No. 4 (2012), pp.2297-2306.

DOI: 10.1155/2012/102629

[7] G. H. Chen: Electrochemical Technologies in Wastewater Treatment, Separation and Purification Technology, Vol. 38, No. 1 (2004), pp.11-41.

[8] E. Bazrafshan, H. Moein, F.K. Mostafapour, S. Nakhaie: Application of Electrocoagulation Process for Dairy Wastewater Treatment, Journal of Chemistry Volume 2013, http: /dx. doi. org/10. 1155/2013/640139.

DOI: 10.1155/2013/640139

[9] South Sumatra Governor Regulation No. 8 of 2012 on the Liquid Waste Quality Standard for Industrial Activities, Hotels, Hospitals, Domestic and Coal Mining, (2012).

[10] Othman, Fadil, J. Sohaili, Moh. Faiqun N., Zulfa Fauzia: Enhacing Suspended Solids Removal from Wastewater Using Fe Electrodes, Malaysian Journal of Civil 18(2), (2006), pp.139-148.

[11] Holt, P.K., Barton, G.W. and Mitchell, C.A.: The Future for Electrocoagulation as Localised Water Treatment Technology. Chemosphere, 59 (2005), pp.355-367.

DOI: 10.1016/j.chemosphere.2004.10.023