Use of Sequential, Single and Kinetic Extractive Schemes to Assess Cadmium (Cd) and Lead (Pb) Availability in Vietnamese Urban Soils

摘要: Modified BCR sequential extraction, single equilibrium-based EDTA extraction and kinetic fractionation were used for estimating the Pb Cd availability in a series of soil samples from 3 sites located urban areas Hanoi (Vietnam). These schemes compared to identify simple, rapid cheap protocol routine estimation remobilizable fraction related potential risk. The comparison these three approaches revealed their convergence terms mobility patterns observed Cd. was characterized by higher extractibality whatever approach. distinguished its high association Feoxides, lower extractability, rate desorption then mobility. For this environmental scenario, scheme at equilibrium could be suggested as best suited simple determination labile pool Pb. pseudo-total concentrations are actually below Vietnamese standard level, contrary results obtained other authors agricultural soils Hanoi.