Assessment of Petroleum Hydrocarbon and Heavy Metal Contamination of Ground Water Resources Around Some Retail Fuel Dispensing Stations in Ojo Local Government Area, Lagos, Nigeria
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Published:2023-12-29
Issue:1
Volume:2
Page:61-72
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ISSN:2814-1024
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Container-title:Environmental Studies Journal
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language:en
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Short-container-title:ESJ
Author:
UNAEZE Chizoba Henrietta1ORCID, MALLAM-DAUDA Mercy1, NOBLE-OKEREKE Helen1ORCID, ANAGA Sochi Otisi1ORCID, YUSUF Hajara Oyiza1ORCID, Mekuleyi Gabriel Olarinde2ORCID, Ogugbue C. J.3ORCID
Affiliation:
1. Environmental Biotechnology and Bio conservation Department, National Biotechnology Development Agency, Abuja 2. Department of Fisheries, Lagos State University 3. University of Port Harcourt
Abstract
The study pursues to appraise the status of groundwater around fuel stations in Ojo Local Government Area of Lagos state, Nigeria. Water samples were gathered from 10 non-identical locations around a fuel station in the study area. Physico-chemical criteria: biological oxygen demand (BOD), pH, chemical oxygen demand (COD), colour, electrical conductivity, total dissolved solid (TDS), and total petroleum hydrocarbon (TPH) were analyzed. Also, heavy metals (Zn, Fe, Pb, Ni and Cd) concentrations of the water samples were investigated using Atomic Absorption Spectrophotometer (AAS). Measured pH (4.3-6.5) for the water in this study revealed weakly acidic water. The electrical conductivity was within the range of 340 and 1000 µScm-1. Other physico-chemical parameters such as TDS, TPH, COD and BOD, were within the range of 247-719 mg/L, 0.01-0.10 mg/L, 28.66-44.22 mg/L, and 16.86-26.01 mg/L values respectively. Zn, Fe, Pb, Ni and Cd were detected in water samples with mean concentrations scores of 0.245, 0.413, 0.007, 0.017 and 0.003 mg/L respectively. In this research work, the values for degree of contamination fell within the range of 0.31-1.04, the water quality index (WQI) values were within the range of 0.0009 -0.0019. Pollution index (PLI) values ranged from 0.2959-0.6332. From the result obtained in this study, petroleum residues and some heavy metals were present in the water samples, although not above the acceptable limits stipulated by WHO except for the case of Iron and Cadmium that were above the acceptable limit specified for drinking water in some of the water samples assessed in this study.
Publisher
Lujosh Ventures Limited
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