Research Article

Correlation analysis of regulated and emerging Tri-Halomethane disinfection by-products and physico-chemical parameters of a community drinking water supply

Shaibu-Imodagbe E. M.1*, MOHAMMAD Y S2, OKUOFU C. A1, UNYIMADU J. P3, WILLIAMS A. B4
1 Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria
2 Department of Chemistry, Ibrahim Badamasi Babangida University Lapai
3 Department of Physical Chemistry, Institute of Oceanography and Marine Research, Victoria Island, Lagos
4 Department of Chemistry, Covenant University, Canaanland, Ota Ogun State
* Corresponding author: shaibuimodagbeem@njmse.msn.ng
Published: Jun, 2015
DOI: 10.67656/njmse.2015.j8eonl6t
Pages: 162-168
Views: 146
Downloads: 119

Abstract

Using the Pearson Correlation technique, this paper established significant linear relationship among pairs of analysed physic-chemical parameters with the determined regulated (regTHMsDBPs) and emerging (emergTHMsDBPs) Tri-halomethanes Disinfection By-Products in the drinking water produced by the Ahmadu Bello University water treatment plant. Using standard methods including the USEPA Method 551.1, selected physico-chemical parameters and the levels of the regulated and emerging tri-halomethanes were determined. These were subsequently subjected to statistical correlation analyses. Statistical correlation of pairs of the some of the chemical parameters with total mean tri-halomethanes, show that total mean regulated tri-halomethanes DBPs (TregTHMs) values significantly correlated positively with temperature, total dissolved solids (TDS), total organic carbon (TOC) and residual chlorine values, while significantly correlating negatively with pH. On the other hand, total mean emerging tri-halomethane DBPs (TemergTHMs) significantly correlated with nitrates concentration levels (F=0.62578*) while being highly significantly correlating with residual chlorine (F=5.2670**), total organic carbon (F=13.3882**), total dissolved solids (F=6.2695**) and pH (F=2.7783**) and total mean regulated THMs (TregTHMs) with F=25.4016**. Similarly, the resulting grand total THM (GTTHMs) concentration levels (comprising of the regulated and the emerging THMs) showed highly significant correlation with the total regulated THMs (TregTHMs) (F=54.9578**) and with total emerging THMs (TemergTHM2)(F=289.2349**) but with pH (F=3.3757**) as the only physico-chemical parameter. These signify that the concentrations of both emerging and regulated THMs are both significantly affected by the proportions of the total dissolved solids, nitrates, total organic carbon and residual chlorine. The generation of these models has established additional frontier to manipulate the concentrations of DBPs in treated drinking water by controlling independent physic-chemical variables in the drinking water treatment process. These predictive models could be safely used to predict the levels of these DBPs even though additional testing and analyses can enhance the confidence in such recommendation and extrapolation.

Keywords

Regulated and emerging Tri-halomethanes Disinfection By-Products Pearson’s Correlation drinking water carcinogenicity

References

  1. Anon, (2001): Water Quality: Ambient Water Quality Guidelines for Organic Carbon; Prepared for the Environmental Protection Division Ministry of Environment, Government of British Columbia, Canada, Updated August 7, 2001;http://www.env.gov.bc.ca/wat/wq/BCguidelines/orgcarbon/ocarbon_over.html Accessed on 5/10/2013.
  2. American Public Health Association –APHA, (1998): Standard Methods for the Examination of Water and Wastewater (20th Edition). American Public Health Association, American Water Works Association and Water Environment Federation.
  3. Coleman, W. E., Munch, J. W., Kaylor, W. H., Streicher, R. P., Ringhand, H. P., and Meier, J. R. (1984). Gas chromatography/mass spectroscopy analysis of mutagenic extracts of aqueous chlorinated humic acid. A comparison of the byproducts to drinking water contaminants. Environ. Sci. Technol.18, 674–678.
  4. EPA Alumni Association: Senior EPA officials discuss early implementation of the Safe Drinking Water Act of 1974, Video, Transcript (see pages 12-13).
  5. IARC (1991). Chlorinated drinking-water; Chlorination by-products. In IARC Monograph on the Evaluation of the Carcinogenic Risk of Chemicals to Humans, Vol. 52, 45–268. International Agency for Research on Cancer, Lyon, France.
  6. Jakubovics, N. S. (1998) Biofilms in Potable Water Distribution Network. Ph.D Thesis, University of Warwick, University of Warwick Publications, http://webcast.warwick.ac.uk/36980 Accessed on 13/10/2011
  7. Jolley, R. L., Condie, L. W., Johnson, J. D., Katz, S., Minear, R. A., Mattice, J. S., and Jacobs, V. A. (Eds.) (1990). Water Chlorination: Chemistry, Environmental Impact, and Health Effects, Vol. 6. Lewis Publishing, Michigan.
  8. LeChevallier, M. W. (2000): Biofilms in Drinking Water Distribution Systems: Significance and Control in Identifying Future Drinking Water Contaminants. The National Academy Press.
  9. Shaibu-Imodagbe, E. M. (2011): Studies of Disinfection by-Products and Heavy Metals in Ahmadu Bello University Drinking Water Supplies and Operations of Some Treatment Plants; Unpublished Ph.D. Thesis submitted to the Department of Water resources and Environmental Engineering and the School of Postgraduate Studies, Ahmadu Bello University, Zaria 153pp.
  10. Shaibu-Imodagbe, E. M., Okuofu, C. A., Unyimadu, J. P., Williams, A. B. and Omenesa, H. (20013). Evaluation of Levels of Regulated Tri-halomethanes (THMs) in a Community Drinking Water Supply in Nigeria. Nigerian journal of Engineering. Vol. 19 No. 2:63-72 March 2013.
  11. Shaibu-Imodagbe, E. M., Okuofu, C. A., Ismail, A., Otun, J.A., Unyimadu, J. P. Williams, A. B. and Adie, D. B. (2014). Occurrence and Levels of Acetonitriles as Emerging Disinfection By-Products in a Community Drinking Water Supply. Pacific Journal of Science and Technology Vol. 15(2):309-317 ISSN 1551-7624. http://www.akamaiuniversity.us/PJST.htm
  12. Uden, P. C., and Miller, J. W. (1983). Chlorinated acids and chloral in drinking water. J. Am. Water Works Assoc.75, 524-527.
  13. United States Environmental Protection Agency - USEPA, (1995): Methods for the Determination of Organic Compounds in Drinking Water. Supplement III. EPA/600/R-95/131, Office of research and development, Washington DC 20460, August.
  14. World Health Organization - WHO (2008): Guidelines for Drinking Water Quality, 3rd Edition, incorporating the first and second Addenda, Vol. 1 – Recommendations. WHO Geneva, 2008 http://www.who.int/water_sanitation_health/dwq/fulltext.pdf Accessed on 18/6/2012
How to Cite

M., S. E., S, M. Y., A, O. C., P, U. J., & B, W. A. (2015). Correlation analysis of regulated and emerging Tri-Halomethane disinfection by-products and physico-chemical parameters of a community drinking water supply. Nigerian Journal of Materials Science and Engineering, 6(1), 162-168. https://doi.org/10.67656/njmse.2015.j8eonl6t

S. E. M., M. Y. S, O. C. A, U. J. P, and W. A. B, "Correlation analysis of regulated and emerging Tri-Halomethane disinfection by-products and physico-chemical parameters of a community drinking water supply," Nigerian Journal of Materials Science and Engineering, vol. 6, no. 1, pp. 162-168, June 2015. doi: 10.67656/njmse.2015.j8eonl6t

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