Mobilization kinetics of heavy metals by NTA and EDTA from contaminated river sediment

Abstract

In this study, a sediment sample was collected from a contaminated river. A laboratory batch experiment was used to simulate the mobilization of heavy metals from river sediments with varied concentrations of NTA and EDTA. The results show that there were two-stages of desorption in the mobilization of heavy metals from the sediment. As the concentrations of NTA and EDTA ranged 0-100 mg/l the mobilization percentages of heavy metals were proportional to the logarithm values of the concentrations of NTA and EDTA The physical meaning of the multiple first-order reaction was significant for the actual condition, but occasionally, it had more errors for Cu and Zn in the initial time.