Abstract
Soils are the basic and most important resources of any people. Differences in soil’s physical and chemical properties are related to the spatial distribution of land uses. Most of these human activities generate toxic substances that are transported considerable distances away from source and become accumulated in soils, sediment, water bodies and fisheries. Urban soils are largely affected by impact of urbanization whose consumptive pattern is related to the social and economic aspect of the society. The study deployed contaminant factor (CF) and geo-accumulation index (Igeo) to examine the differences in the urban soils of Lagos Mainland Area due to human activities. The topsoils of the predominant human activities identified in the area were sampled and analyzed to findout the differences in the soils due to the concentration of heavy metals among six land use types. The coefficient of variation and standard deviation techniques were deployed to study the degree of variation and compare the mean values of soil physical and chemical properties of twelve representative topsoils collected from six locations. All metals analyzed showed significant (p
Highlights
There is a relationship between human land use and environmental concentrations of heavy metals in urban soils
The concentration of heavy metals, contamination factor and Igeo differ among land uses in Lagos Mainland Area provide an understanding of the level of pollution and the implications for urban soils and sustainable development and management
The study sought to examine the associations between land uses and heavy metal concentration in urban land uses, to distinguish heavy metal concentrations resulting from anthropogenic activities different from background surface rock accumulation and to suggest the implications for the sustainable management of the Lagos urban environment of the Lagos Mainland Area
Summary
There is a relationship between human land use and environmental concentrations of heavy metals in urban soils. The location of markets, industries, automobile shops, residential areas and traffic networks are found everywhere in Lagos Mainland Area and discharging numerous contaminants to the environment unabated This necessitates a study of the spatial pattern of urban soil pollution in Lagos Mainland Area to determine areas of potential risks of these harmful heavy metals which could enhance remediation and protection of the urban environment. The objectives of the study were to study the association between land uses and heavy metal concentration, to compare the level of pollution due to anthropogenic activities different from background surface rock accumulation and to deduce their implications for the sustainable management of the Lagos urban environment of the Lagos Mainland Area
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