Evaluation of the effects of abattoir effluent on the physicochemical and bacteriological quality of River Benue, Nigeria.

Autor: Omoni VT; Department of Microbiology, Federal University of Agriculture, Makurdi, Benue State, Nigeria., Bankole PO; Department of Pure and Applied Botany, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria. bankolepo@funaab.edu.ng., Omoche O; Department of Botany, Federal University of Agriculture, Makurdi, Benue State, Nigeria., Obida C; Department of Geography, Nigeria Defence Academy, Kaduna, Kaduna State, Nigeria., Igben C; Department of Microbiology, Federal University of Agriculture, Makurdi, Benue State, Nigeria., Stephen OE; Department of Botany, Federal University of Agriculture, Makurdi, Benue State, Nigeria., Ogwo EI; Department of Environmental Resource Management, Abia State University, Uturu, Abia State, Nigeria., Torjir DN; Department of Microbiology, Federal University of Agriculture, Makurdi, Benue State, Nigeria.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2022 Nov 24; Vol. 195 (1), pp. 146. Date of Electronic Publication: 2022 Nov 24.
DOI: 10.1007/s10661-022-10768-4
Abstrakt: This study investigated the impact of continual discharge of untreated abattoir effluents on the water quality of River Benue. Three major abattoirs (Wurukum, Wadata and Northbank) in Makurdi, Nigeria, and their polluting strength in river upstream and downstream were measured and compared. Two water quality parameters: physicochemical and bacteriological were investigated. Water quality index (WQI) was computed for all sampling sites. Results revealed that some of the physiochemical parameters were above recommended limits, especially in downstream river, in particular, the turbidity (24.0-55.5 mg/l), TSS (62.6-92.0 mg/l), DO (8.0 mg/l), and total hardness (160-240 mg/l). All sampling sites indicated an increased bacterial population while Salmonella spp. and Escherichia coli were the predominant bacteria among the ten genera identified in water upstream and downstream. Faecal coliforms increased from upstream to downstream in two sampling sites (Wurukum and Wadata). Strong positive correlations were observed between upstream and downstream samples for pH, EC, turbidity, TSS, DO, COD, SO 4 2- , TC, and Shigella spp. WQI revealed that all sampling locations were heavily polluted and unsuitable for drinking purposes (WQI > 300) based on both the physicochemical and bacterial parameters. The sampling sites, however, showed excellent water quality based only on physicochemical properties especially upstream at both Wurukum and Northbank sampling sites (WQI < 50). It was suggested that anthropogenic activities around the river may be responsible for the high concentration of some physiochemical parameters and bacterial loads observed in the river downstream. Moreover, it was concluded that microbial loads should be fully considered in WQI computation in terms of water quality. Our results are useful for water resource and waste management in terms of practices and policy guidance, especially for developing countries.
(© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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