JWARP  Vol.2 No.7 , July 2010
Photocatalysis of Naphthenic Acids in Water
ABSTRACT
Naphthenic acids (NAs) are soluble in water and are concentrated in oil sand process water (OSPW) as a result of caustic oil sands extraction processes. Significant environmental and regulatory attention has been focused on the naphthenic acids. A laboratory scale photocatalysis system was developed using UV254 florescent lamps. Experiments were conducted to determine the NA degradation efficiency of this system in presence of TiO2 catalyst. Degradation kinetics for total NAs as well as individual z-families was calculated. The developed treatment system was able to degrade OSPW NAs with half life values ranging between 1.55 and 4.80 h. This system also completely reduced the acute toxicity associated with NAs (up to 5 min. IC50 v/v > 90%) based on Microtox assays.

Cite this paper
nullS. Mishra, V. Meda, A. Dalai, D. McMartin, J. Headley and K. Peru, "Photocatalysis of Naphthenic Acids in Water," Journal of Water Resource and Protection, Vol. 2 No. 7, 2010, pp. 644-650. doi: 10.4236/jwarp.2010.27074.
References
[1]   J. V. Headley and D. W. McMartin, “A Review of the Occurrence and Fate of Naphthenic Acids in Aquatic En-vironments,” Journal of Environmental Science and Health, Part A, Vol. 39, No. 8, 2004, pp. 1989-2010.

[2]   J. S. Clemente and P. M. Fedorak, “A Review of the Oc-currence, Analyses, Toxicity and Biodegradation of Naphthenic Acids,” Chemosphere, Vol. 60, No. 5, 2005, pp. 585-600.

[3]   L. E. J. Lee, K. Haberstroh, D. G. Dixon and N. C. Bols, “Salinity Effects on the Toxicity of Naphthenic Acids to Rainbow Trout Cell Lines,” Proceedings of the 27th Aq-uatic Toxicity Workshop, Halifax, October 2000.

[4]   R. A. Frank, K. Fischer, R. Kavanagh, B. K. Burnison, G. Arsenault, J. V. Headley, K. M. Peru, G. V. D. Kraak and K. R. Solomon, “Effect of Carboxylic Acid Content on the Acute Toxicity of Oil Sands Naphthenic Acids,” En-vironmental Science and Technology, Vol. 43, No. 2, 2009, pp. 266-271.

[5]   M. D. MacKinnon and H. Boerger, “Description of Two Treatment Methods for Detoxifying Oil Sands Tailings Pond Water,” Water Pollution Research Journal of Can-ada, Vol. 21, No. 4, 1986, pp. 496-512.

[6]   A. C. Scott, W. Zubot, M. D. MacKinnon, D. W. Smith and P. M. Fedorak, “Ozonation of Oil Sands Process Water Removes Naphthenic Acids and Toxicity-Technical Note,” Chemosphere, Vol. 71, No. 1, 2008, pp. 156-160.

[7]   E. K. Quagraine, H. G. Peterson and J. V. Headley, “In Situ Bioremediation of Naphthenic Acids Contaminated Tailing Pond Waters in the Athabasca Oil Sands Region-Demonstrated Field Studies and Plausible Options: A Review,” Journal of Environmental Science and Health, Part A, Vol. 40, No. 3, 2005, pp. 685-722.

[8]   A. C. Scott, M. D. MacKinnon and P. M. Fedorak, “Naphthenic Acids in Athabasca Oil Sands Tailings Wa-ters are Less Biodegradable Than Commercial Naph- thenic Acids,” Environmental Science and Technology, Vol. 39, 2005, pp. 8388-8394.

[9]   O. V. Biryukova, P. M. Fedorak and A. Q. Sylvie, “Bio-degradation of Naphthenic Acids by Rhizosphere Micro-organisms,” Chemosphere, Vol. 67, No. 10, 2007, pp. 2058-2064.

[10]   S. A. Armstrong, “Dissipation and Phytotoxicity of Oil Sands Naphthenic Acids in Wetland Plants,” Ph.D. Dissertation, University of Saskatchewan, Saskatoon, 2008.

[11]   X. Han, A. C. Scott, P. M. Fedorak, M. Bataineh and J. W. Martin, “Influence of Molecular Structure on the Biodegradability of Naphthenic Acids,” Environmental Science and Technology, Vol. 42, No. 4, 2008, pp. 1290- 1295.

[12]   D. W. McMartin, “Persistence and Fate of Acidic Hy-drocarbons in Aquatic Environments: Naphthenic Acids and Resin Acids,” Ph.D. Dissertation, University of Saskatchewan, Saskatoon, 2003.

[13]   D. W. McMartin, J. V. Headley, D. A. Friesen, K. M. Peru and J. A. Gillies, “Photolysis of Naphthenic Acids in Natural Surface Water,” Journal of Environmental Science and Health, Part A, Vol. 39, No. 6, 2004, pp. 1361- 1383.

[14]   J. V. Headley, J. Du, K. M. Peru, D. W. McMartin, “Electrospray Ionization Mass Spectrometry of the Pho-todegradation of Naphthenic Acids Mixtures Irradiated with Titanium Dioxide,” Journal of Environmental Science and Health, Part A, Vol. 44, No. 6, 2009, pp. 591-597.

[15]   A. Janfada, J. V. Headley, K. M. Peru and S. L. Barbour, “A Laboratory Evaluation of The Sorption of Oil Sands Naphthenic Acids on Organic Rich Soils,” Journal of En-vironmental Science and Health, Part A, Vol. 41, No. 6, 2006, pp. 985-997.

[16]   V. V. Rogers, K. Liber and M. D. MacKinnon, “Isolation and Characterization of Naphthenic Acids from Athabasca Oil Sands Tailings Pond Water,” Chemosphere, Vol. 48, No. 5, 2002, pp. 519-527.

[17]   J. V. Headley, K. M. Peru, D. W. McMartin and M. Winkler, “Determination of Dissolved Naphthenic Acids in Natural Waters Using Negative-Ion Electrospray Mass Spectrometry,” Journal of the AOAC International, Vol. 85, No. 1, 2002, pp. 182-187.

[18]   J. V. Headley, K. M. Peru, M. P. Barrow and P. J. Derrik, “Characterization of Naphthenic Acids from Athabasca Oil Sands Using Electrospray Ionization: The Significant Influence of Solvents,” Analytical Chemistry, Vol. 79, No. 16, 2007, pp. 6222-6229.

[19]   R. A. Frank, R. Kavanagh, B. K. Burnison, G. Arsenault, J. V. Headley, K. M. Peru, G. V. D. Kraak and K. R. So-lomon, “Toxicity Assessment of Collected Fractions from an Extracted Naphthenic Acid Mixture,” Chemospere, Vol. 72, No. 9, 2008, pp. 1309-1314.

[20]   J. W. Martin, X. Han, K. M. Peru and J. V. Headley, “Comparison of High- and Low-Resolution Electrospray Ionization Mass Spectrometry for the Analysis of Naph-thenic Acid Mixtures in Oil Sands Process Water,” Rapid Communication in Mass Spectrometry, Vol. 22, No. 12, 2008, pp. 1919-1924.

[21]   S. Mishra, “Microwave Assisted Photocatalytic Treatment of Naphthenic Acids in Water,” Ph.D. Dissertation, University of Saskatchewan, Saskatoon, 2009.

 
 
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