An Assessment of Heavy-Metal Contamination in Soils within Auto-Mechanic Workshops Using Enrichment and Contamination Factors with Geoaccumulation Indexes — Oak Academic Publishing
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An Assessment of Heavy-Metal Contamination in Soils within Auto-Mechanic Workshops Using Enrichment and Contamination Factors with Geoaccumulation Indexes
Department of Chemistry and Industrial Chemistry, Adekunle Ajasin University, Akungba-Akoko, Nigeria
1 Department of Chemistry and Industrial Chemistry, Adekunle Ajasin University, Akungba-Akoko, Nigeria
Soil characterization and heavy metals in different layers (0 - 15 cm; 15 - 30 cm and 30 - 45 cm depth) of automobile mechanic waste dumps were studied. The soils showed remarkably high levels of all the metals above background concentrations with most (Ni, Cu, Fe, Cr and Cd) decreasing with soil depth. The distribution pattern were in the following order Fe > Cu > Zn > Pb > Cr > Ni > Cd. Across all the sampling locations and profil es, Fe and Cd showed the highest (476.4 μg·g -1 ) and least (37.5 μg ·g -1 ) mean concentrations respectively. Pollution load index (PLI) and index of geoaccumulation ( I geo ) revealed overall high and moderate contamination respectively but the enrichment factors (EFs) for Pb Ni and Cd are severe. The inter-element relationship revealed the identical source of elements in the soils of the studied area. The accuracy of the results has been cheeked using the standard reference material; SRM (PACS-2). The mechanic waste dumps represent potential sources of heavy metal pollution to environment. The elevated levels of heavy metals in these soil profiles constitute a serious threat to both surface and groundwater.
KeywordsHeavy MetalsSoil ContaminationSoil ProfilesAutomobile MechanicEnrichment FactorGeoaccumulation Index
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