the existing sulfide can produce a large number of acid substances, which are dissolved in water and to form acid mine wastewater (AMD)1. AMD has multiple hazards to the natural environment, embodied in low pH value, high sulfate
44,45, and source of industrial activities9,46, respectively. The selected elemental ratios for PM10collected in this study are summarized in Table2. High Fe/Al ratios (1.03–2.66) were found during the local
2. Material and Methods A stock solution of 1000 mg/L was prepared with Pb(NO3)2. Different concentrations of solutions were prepared by diluting for use in batch experimental studies. All chemicals were at 99% purity and supplied from Sigma-Aldrich. All experiments were performed at constant ...
In addition to the newly discovered contaminants that fall under various groups of pharmaceuticals, personal care products, flame retardants, and pesticides [1], there are legacy contaminants that have been present for a long time; yet concerns about their hazards are still emerging. One of these...
pH was kept at 5.5, at which level the ligand exists mainly as [H2Y]2−, thus allowing intercalation by anion-exchange with LDH as follows (Equation (2)): 2[Zn2Al(OH)6]NO3 + [H2Y]2− → [Zn2Al(OH)6]2[H2Y] + 2NO3−. (2) The final gel, ZnAl-EDTA (H2), was ...