Authors : Maryam Abdus-Salam; Modinat Adekunle; Yusuf Akinsanya

Volume/Issue : Volume 9 - 2024, Issue 7 - July

Google Scholar : https://tinyurl.com/yr8p89m4

Scribd : https://tinyurl.com/bdek36ds

DOI : https://doi.org/10.38124/ijisrt/IJISRT24JUL877

Abstract : Access to clean drinking water is crucial for human health and survival. In vicinities near municipal dumpsites, ensuring groundwater quality is especially vital to safeguard the ecosystem and human health. This study utilized the Entropy Weighted Water Quality Index (EWQI), a novel assessment tool, to evaluate groundwater near the Awotan dumpsite in southwestern Nigeria. Forty-five groundwater samples were collected during rainy and dry seasons and explored for groundwater quality using EWQI. The physicochemical parameters fall within permissible limits for domestic purposes during both seasons. Nonetheless, 2% of the samples surpassed the recommended nitrate limit of 45 mg/L, and all samples had iron levels above the 0.3 mg/L threshold. The calculated EWQI values for these samples ranged from 20 to 528, with 2% deemed excellent, 16% good, 51% medium, 18% poor and 13% extremely poor in terms of water quality for domestic use. The spatial variability in water quality levels means that there are localised impacts of the dumpsite and thus there is need for targeted management strategies. We recommend the government undertake sustainable retrofitting to enhance landfill design, incorporating an efficient leachate collection system to lessen groundwater pollution. Additionally, nearby residents should implement water treatment methods to improve water quality and minimize health risks.

Keywords : Awotan Dumpsite, EWQI, Water Quality, Public Health.

References :

1. Igboama, W.N., Hammed, O.S., Fatoba, J.O. et al. (2022). Review article on impact of groundwater contamination due to dumpsites using geophysical and physiochemical methods. Applied Water Science. 12, 130. https://doi.org/10.1007/s13201-022-01653-z
2. Brindha, K. and Schneider, M. (2019). ‘Impact of urbanization on groundwater quality’, GIS and geostatistical techniques for groundwater science, pp. 179–196. Elsevier, Netherlands. 10.1016/B978-0-12-815413-7.00013-4 
3. Kolawole, T. O., Iyiola O., Ibrahim, H, and Isibor, R. (2023). Contamination, ecological and health risk assessments of potentially toxic elements in soil around a municipal solid waste disposal facility in Southwestern Nigeria. Journal of Trace Elements and Minerals, 5, https://doi.org/10.1016/j.jtemin.2023.100083
4. Adekanmbi, A.O., Oluwaseyi, T.A. and Oyelade A.A. (2021) Dumpsite leachate as a hotspot of multidrug resistant Enterobacteriaceae harbouring extended spectrum and AmpC β-lactamase genes; a case study of Awotan municipal solid waste dumpsite in Southwest Nigeria. Meta Gene, 28, https://doi.org/10.1016/j.geosus.2023.09.005
5. Adimalla, N., Li, P., and Venkatayogi, S. (2018). Hydrogeochemical Evaluation of Groundwater Quality for Drinking and Irrigation Purposes and Integrated Interpretation with Water Quality Index Studies. Environmental Processes, 5(2), 363–383. https://doi.org/10.1007/s40710-018-0297-4.
6. Gorgij, A. D., Kisi, O., Moghaddam, A. A., and Taghipour, A. (2017). Groundwater quality ranking for drinking purposes, using the entropy method and the spatial autocorrelation index. Environmental Earth Sciences, 76(7), 269. https://doi.org/10.1007/s12665-017-6589-6
7. SON. (2007). Nigerian Standard for Drinking Water Quality. Nigerian Industrial Standard.  1–30.
8. WHO (2004). Guidelines for drinking-water quality (3rd ed). World Health Organization.
9. Munagala, S., Jagarapu, D. C. K., & BSS, R. R. (2020). Determination of water quality index for ground water near municipal dump site in Guntur. Materials Today: Proceedings, 33: 724-727. https://doi.org/10.1016/j.matpr.2020.06.030.
10. Weissmann, G.S., Zhang, Y., LaBolle, E. and Fogg G. (2002). Dispersion of groundwater age in an alluvial aquifer system, Water Resources Research, 38(10), pp. 16–1. https://doi.org/10.1029/2001WR000907
11. Liu, S., Wang, L., and Guo, C. (2020). Heavy metal pollution and ecological risk assessment in brownfield soil from Xi’an, China: An integrated analysis of man-land interrelations. PLOS ONE, 15(11), e0241398. https://doi.org/10.1371/journal.pone.0241398