EVALUATION OF THE PHYSICO-CHEMICAL COMPOSITION OF SOIL AT ELECTRONICS REPAIR WORKSHOPS IN BENIN, NIGERIA.

Soil samples were collected using grid method from several electronic repair workshops in Benin City, a control (TS) which was site with no activity and DTS thirty meters away the at depth of 0-15cm. The physiochemical properties carried out standard methods. Heavy metals determined Atomic Absorption Spectrophotometer (AAS), while sequential extraction European community Bureau Reference (BCR) method. results are as follows; 5.9 to 6.5 for pH, 150±0.71 342±1.34 µs/cm EC, 2.1±0.29 6.9±0.87 O.M, 6.3±0.35 14.2±0.35 mg/kg TOC, 157.6±0.44 217.9±0.45 CEC, 08.3±0.50 13.3±1.93 SO42-, 08.5±1.30 16.1±2.00 NO3-, 7.7±1.41 - 14.7±2.10 PO43-. concentration Fe, Pb, Cd, Ni, Zn Cu respectively; 321.3 514.3 mg/kg, 1.78 6.17 0.59 1.05 6.4 23.12 35.81 41.38 28.88 44.35 mg/kg. From results, concentrations higher soils work shops compared those soil that 30m (DTS). fractionation revealed Zn, Cd Ni mainly residual Fe-Mn oxide fraction Pb organic bound fraction. enrichment factors all sites range very severe enrichment. Mobility factor low ranging 3.13-16.48, indicating generally availability well mobility. Environmental risk showed these pose potential threat environment. Contamination except sites, exceeded unity clearly contaminated metals. Continuous monitoring is essential sources