期刊名称：Journal of Environmental Chemistry and Ecotoxicology
电子版ISSN：2141-226X
出版年度：2011
卷号：3
期号：7
页码：184-194
语种：English
出版社：Academic Journals
摘要：The study of heavy metals in environmental niches is essential, especially with their potential toxicity to human life. Metal toxicity depends on chemical associations in soils. For this reason, determining the chemical form of a metal in soils is important to evaluate its mobility and bioavailability. In this manner sequential extraction was used to fractionate seven heavy metals (Cd, Cu, Ni, Zn, Cr, Fe and Pb) from ten contaminated soils into six operationally defined groups: water soluble, exchangeable, carbonate, Fe -Mn oxide, organic, and residual. The residual fraction was the most abundant pool for all the metals examined. A significant amount (2.00 to 73.47, 1.77 to 17.78, 9.76 to 58.54 and 1.71 to 54.11% respectively) of Cu, Cd, Cr and Pb was present in the potentially available fraction: non residual fraction. Contamination of Zn, Ni and Fe in these soils was not as severe as Cu, Cd, Cr and Pb. Overall, the order of contamination was Cu > Cr > Pb > Cd > Ni > Zn > Fe. The study indicated that the possible pollution of soils of this environment was as a result of activities carried out within these areas.
关键词：Fractionation; heavy metals; mechanic; workshops; Kaduna.
