Volume 3, Number 2 (2019)
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Home > Journals > SCIREA Journal of Environment > Archive > Paper Information

Heavy Metal Contamination of Ewhare Dumpsite Environment in Nigeria’s Niger Delta.

Volume 3, Issue 2, April 2019    |    PP. 30-45    |PDF (466 K)|    Pub. Date: April 26, 2019
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Dirisu, C.E., Department of Environmental Management and Toxicology, Faculty of Life Sciences, University of Benin Benin City, Edo Nigeria
E.Biose, Department of Environmental Management and Toxicology, Faculty of Life Sciences, University of Benin Benin City, Edo Nigeria
I.T. Aighewi, Department of Environmental Management and Toxicology, Faculty of Life Sciences, University of Benin Benin City, Edo Nigeria

ABSTRACTThis study characterized some indices of heavy metals in the soils of Ewhare dumpsite and adjoining land in Agbaro-Warri, Delta State, in Nigeria’s Niger Delta in order to ascertain the status and degree of contamination there. Six soil samples were collected within the dumpsite or down slope location (DS) and the adjoining up slope location bordering the dumpsite (US) at three depths. Samples collected were pre-treated and analyzed using standard procedures and necessary precautionary quality assurance steps observed. The heavy metal composition was determined in Atomic Absorption Spectrophotometer. The result showed that the concentration of heavy metal were in the following decreasing order: Fe > Zn > Mn > Cu > Pb > Cd > Cr > Ni > V. Computation of Enrichment factor (EF) of the heavy metals showed that there was a,moderate enrichment for copper (Cu), a significant enrichment of zinc (Zn) and nickel (Ni), very high enrichment for chromium (Cr), cadmium (Cd), lead (Pb) and vanadium (V). The Contamination factor (CF) indicated low contamination of Fe, moderate contamination of manganese (Mn), copper (Cu) at the dumpsite location and only the top soil (0-15cm) of the adjoining land; considerable contamination of nickel (Ni) and vanadium (V) at the dumpsite and top soil of the adjoining land; very high contamination of zinc (Zn), chromium (Cr), cadmium (Cd), and lead (Pb). Pollution Load Index (PLI) showed that Ewhare dumpsite is polluted (PLI > 1) by metals. The Geo accumulation Index (Igeo) showed that soils of Ewhare dumpsite was practically not polluted for Fe and Mn from anthropogenic standpoint. However, it is moderately to heavily polluted with zinc (Zn) and nickel (Ni); heavily polluted with vanadium (V); heavily to extremely polluted with chromium (Cr), cadmium (Cd), and lead (Pb). Potential ecological risk index (PERI) showed slight pollution of manganese (Mn), zinc (Zn) and copper (Cu), medium pollution for chromium (Cr), Strong pollution for nickel (Ni); very strong pollution for lead (Pb) and extremely strong pollution of cadmium (Cd). The risk index (RI) for Ewhare dumpsite indicated a very strong risk or level D for the dumpsite and adjoining upslope location respectively. Mn, Zn, CU, Cr, Pb and Ni showed low ecological risk (RI < 150) in all sample depths in the study area except Cd which showed very high ecological risk (RI> 600) in all sample depths in the study area. In view of the level of soil pollution of this dumpsite located in an estuarine setting, with shallow aquifer, it is suggested that an alternative be sought for this dumpsite as there is a high probability of groundwater contamination with heavy metals which could endanger the health of local inhabitants that depend on water wells for their domestic use. If the dumpsite must remain opened on the short-term, it is suggested that soil and groundwater monitoring program be initiated by the State Environmental Ministry and appropriate warnings disseminated when necessary. Furthermore, comprehensive studies of organic contaminants in the dumpsite soil and it’s environ is also recommended in view of the sundry wastes dumped daily.

Heavy metals; Municipal solid Waste dumpsite; Soil pollution; Warri;; Pollution index; Niger Delta.

Cite this paper
Dirisu, C.E., E.Biose, I.T. Aighewi, Heavy Metal Contamination of Ewhare Dumpsite Environment in Nigeria’s Niger Delta., SCIREA Journal of Environment. Vol. 3 , No. 2 , 2019 , pp. 30 - 45 .


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