ENRICHMENT AND CHEMICAL FRACTIONATION OF CORPER AND MAGANESE IN SOILS OF ABUJA STREETS

Abstract

Corper and Manganese contents and their chemical forms in the surface soil of the Abuja streets were investigated to quantitatively assess their contamination, mobility, and potential bioavaibility. Thirty surface soil samples were collected and analyzed for total content and chemical forms of Cu and Mn. The results revealed that the total contents of Cu and Mn in the soil ranged from 4.93 to 9.67 mg and kg and 23.67 to 85.33 mg and kg respectively. The enrichment factors of Cu and Mn in some soils were lower than 1.0 with the exception of Ayingba street, Aminu Kano, Lagos street, Ladoke Boleuvard and Tafawa Balewa street where EFs were more than 1 for Mn, indicating that Mn has anthropogenic origin. Less than 2% and more than 60% of total Cu and Mn contents in the soil at most sampling sites were associated with the exchangeable fraction and residual fraction, respectively, showing their low mobility and bioavailabiliy. The major sync for anthropogenic Cu was organic matter and carbonate, while for Mn was carbonate and reducible phase.