Estimation and Removal of Chlorophenolic Compounds from Paper Mill Waste Water by Electrochemical Treatment
A number of toxic chlorophenolic compounds are formed during pulp bleaching. The nature and concentration of these chlorophenolic compounds largely depends upon the amount and nature of bleaching chemicals used. These compounds are highly recalcitrant and difficult to remove but are partially removed by the biochemical treatment processes adopted by the paper industry. Identification and estimation of these chlorophenolic compounds has been carried out in the primary and secondary clarified effluents from the paper mill by GCMS. Twenty-six chorophenolic compounds have been identified and estimated in paper mill waste waters. Electrochemical treatment is an efficient method for oxidation of pollutants and has successfully been used to treat textile and oil waste water. Electrochemical treatment using less expensive anode material, stainless steel electrodes has been tried to study their removal. The electrochemical assembly comprised a DC power supply, a magnetic stirrer and stainless steel (316 L) electrode. The optimization of operating conditions has been carried out and treatment has been performed under optimized treatment conditions. Results indicate that 68.7% and 83.8% of cholorphenolic compounds are removed during 2 h of electrochemical treatment from primary and secondary clarified effluent respectively. Further, there is a reduction of 65.1, 60 and 92.6% of COD, AOX and color, respectively for primary clarified and 83.8%, 75.9% and 96.8% of COD, AOX and color, respectively for secondary clarified effluent. EC treatment has also been found to increase significantly the biodegradability index of wastewater because of conversion of non- biodegradable fraction into biodegradable fraction. Thus, electrochemical treatment is an efficient method for the degradation of cholorophenolic compounds, removal of color, AOX and other recalcitrant organic matter present in paper mill waste water.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125099Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1169
 C. Sharma, S. Mohanty, S. Kumar, N.J. Rao, “Gas chromatographic determination of pollutants in the chlorination and caustic extraction stage effluents from bleaching processes of agricultural residues,” Inter. J of environ and analyt. chem., vol. 64, pp. 289-300, 1996.
 M. Roy, S. K. Chakrabarti, N.K. Bharadwaj, S. Chandra, S. Kumar, S. Singh, P. K. Bajpai, “Characterization of chlorinated organic material in eucalyptus pulp bleaching effluents,” journal of sci ind res., vol. 63, pp. 527-535, 2004.
 R. C. C. Wegman, Van den Broek, H. H., “Chlorophenols in river sediment in The Netherlands,” Water Res. Vol. 12, pp. 227, 1983.
 J. F. Niu, H. Lin, J. L. Xu, H. Wu, Y. Li, “Electrochemical mineralization of perfluorocarboxylic acids (PFCAs) by Ce-doped modified porous nano-crystalline PbO2 film electrod,”. Environ. Sc. & Tech., vol. 46, pp. 10191–10198, 2013.
 H. Lin, J. F. Niu, S. Y. Ding, L.L. Zhang, “Electrochemical degradation of perfluorooctanoic acid (PFOA) by Ti/SnO2- Sb, Ti/SnO2-Sb/PbO2 and Ti/SnO2-Sb/MnO2 anodes,” Water Res., vol. 46, pp. 2281–2289, 2012.
 S. K. Johnson, L. L. Houk, J. R. Feng, R. S. Houk, D. C. Johnson, “Electrochemical incineration of 4-chlorophenol and the identification of products and intermediates by mass spectroscopy,” Environ. Sci. Technol. Vol. 33, pp 2638-2644, 1999.
 M. Kobya, O. T. Can, M. Bayramoglu, “Treatment of textile wastewaters by electro coagulation using iron and aluminium electrodes,” Journ. of Hazard. Mater, B vol. 100, pp.163–178, 2003.
 N. Adhoum, L. Monser, “De colorization and removal of phenolic compounds from olive mill wastewater by electro-coagulation,” Chemical Engineering Process, vol. 43, pp. 1281–1287, 2004.
 J. D. Rodgers, W. Jedral, N. J. Bunce, “Electrochemical oxidation of chlorinated phenols,” Environ. Sci. Technol. vol. 33, pp. 453–1457, 1999.
 E. Yuksel, M. Eyvaz, E. Gurbulak, “Electrochemical treatment of color index reactive orange 84 and textile wastewater by using stainless steel and iron electrodes,” Environ. Prog. Sustainable Energy, vol. 32, pp. 60−68, 2013.
 M. Trapido, A. Hirvonen, Y. Veressinina, J. Hentunen, R. Munter, “Ozonation, ozone/UV and UV/H2 O2 degradation of chlorophenols,” Ozone Sci. Eng., vol. 19, pp. 75 –96, 1997.
 Z. Zaied, N. Bellakhal, “Electro coagulation treatment of black liquor from paper industry,” Journ. of Hazard. Mater. Vol. 163, pp. 995–1000, 2009.
 A. K. Choudhary, S. Kumar, C. Sharma, “Removal of chloro-organics and color from pulp and paper mill wastewater by polyaluminium chloride as coagulant,” Des. & water Treat, DOI: 10.1080/19443994.2013.848670, pp. 1–12, 2013.
 K. Lindstrom, J. Nordin, “Gas chromatography mass spectroscopy of chlorophenols in spent bleach liquors, “J. of Chrom., vol. 128, pp. 13-26, 1976.
 L. Yang, B. Sun, W. Huang, “Study on removal of organics of different molecular weight by coagulation membrane filtration process,” J. Sustain. Develop., vol. 3, pp. 191–196, 2010.