Distribution, correlation and risk assessment of selected metals in urban soils from Islamabad, Pakistan.

摘要: Urban soil samples were analyzed for Ca, Cd, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Pb, Sr and Zn by atomic absorption spectrophotometric method. Multivariate statistical approach was used to study the apportionment of selected metals in during summer winter. The degree contamination along with geoaccumulation index, enrichment factor also evaluated. In water-extract samples, relatively higher levels noted Pb average concentrations 56.38, 33.82, 12.53, 7.127, 5.994, 1.045mg/kg summer, while mean metal winter 76.45, 38.05, 3.928, 0.627, 8.726, 0.878mg/kg, respectively. case acid-extract soils, Mn found at 27,531, 12,784, 2769, 999.9, 737.9, 393.5, 115.1mg/kg, 23,386, 3958, 3206, 254.6, 1511, 453.6, 53.30mg/kg, winter, Most showed random distribution diverse correlations both seasons. Principal component analysis cluster revealed significant anthropogenic intrusions Na soils. Geoaccumulation indices factors indicated moderate heavy Cd exhibited (EF>5) activities. Overall, on basis, considerable (C(deg)>16) observed seasons, although it Present compared those reported from other areas around world.