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• W2332708508 abstract "Selected heavy metals Fe, Cd, Ni and Cr were studied in contaminated soil samples collected from south-eastern Nigeria. Geochemical differentiation into different chemical fractions, using Ma and Rao six-step sequential chemical extraction procedure, was carried out to assess the potential mobility and bioavailability of the heavy metals in the soil profiles. The residual fraction was the most important phase for the four heavy metals with the following average percentage values 74.43 for Fe, 37.69 for Cd, 70.11 for Ni and 62.47 for Cr. The carbonate fraction contained an appreciable proportion of Fe, Cd and Ni with the average percentage values of 16.29, 14.86 and 10.47 respectively, while organic fraction was of next importance for Cr with an average percentage value of 27.14. The Fe-Mn oxide fraction also contained 15.86% of Cd. Relatively low amounts of the metals were associated with water soluble and exchangeable fractions. The mobility factors for the metals in all the sites ranged from 8.55 to 40.04 for Fe, 8.66 to 56.58 for Cd, 12.74 to 30.19 for Ni and 0.82 to 7.22 for Cr. The generally low values of mobility factors coupled with significantly high levels of association of the metals with the residual fraction, indicate that the metals do not pose any environmental risk nor hazard." @default.
• W2332708508 created "2016-06-24" @default.
• W2332708508 creator A5069156450 @default.
• W2332708508 date "2013-01-01" @default.
• W2332708508 modified "2023-09-27" @default.
• W2332708508 title "Chemical partitioning of iron, cadmium, nickel and chromium in contaminated soils of south-eastern Nigeria" @default.
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• W2332708508 doi "https://doi.org/10.3184/095422913x13581872822530" @default.
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