Research on Passivation Performance of Arsenic-Contaminated Soil in Mining Areas Using Modified Biomass Fuel Ash
The actual arsenic contaminated soil around an abandoned mining area in Anhui Province was collected as the research object,and biomass fuel ash and magnesium oxide ball milling modified biomass fuel ash were selected to passivate the arsenic contaminated soil,so as to investigate the effect of passivator on the arsenic speciation distribution in soil.The results show that all experimental groups can improve the passivation effect of soil available arsenic by increasing soil pH value.From the changing trend of each group,the passivation effect of biomass fuel ash modified by magnesium oxide ball milling on soil available arsenic is further enhanced,and the passivation effect of adding 4%ball milling modification is relatively good,which is about 12%higher than that of the blank group,and about 5%higher than that of adding 6%raw biomass fuel ash.After each passivation treatment,the forms of arsenic in soil are changing to amorphous,crystalline-bound and residual,which promotes the stabilization of arsenic in soil and is beneficial to the long-term stability of arsenic in soil.
NETL
NSTL
万方数据
