Anthropogenic Influence on Selected Heavy Metal Contamination of Urban Soils of Akure City, Nigeria

Autor: J. G. Ayenimo, O. F. Olorundare, A. V. Popoola, K. O. Ipinmoroti
Rok vydání: 2011
Předmět:
Zdroj: Soil and Sediment Contamination: An International Journal. 20:509-524
ISSN: 1549-7887
1532-0383
DOI: 10.1080/15320383.2011.587041
Popis: Levels of Cd, Ni, and Pb in topsoil (0–5 cm) taken from seven different sites of the urban city of Akure, Nigeria, were determined using flame atomic absorption spectrophotometer after the wet digestion method. This was with a view to appraising the influence of various anthropogenic activities on heavy metal contamination of the urban soil. Results show that the range of Cd was 6.27–10.34 ppm, Ni 7.17–14.78 ppm, and Pb 9.22- 46.19 ppm. This analytical data indicated a significant accumulation of heavy metals above background levels, with highest concentrations found in mechanic/battery charger workshops. The level of accumulation was assessed using accumulation factor (AF), and the values obtained exceeded 4 in all sites. This implies that the heavy metals are not from the natural geochemistry of Akure but from human activities. The classes of contamination were differentiated using geoaccumulation index (I geo). The I geo performed revealed that Cd (2< I geo
Databáze: OpenAIRE
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