Water, Год журнала: 2024, Номер 16(6), С. 821 - 821

Опубликована: Март 12, 2024

Due to its high acidity and toxic metal content, acid mine drainage (AMD) needs be properly treated before being discharged into the environment. This study took AMD collected from one specific in China as a sample investigated treatment methodology for AMD. The water quality of was measured, with caustic soda (NaOH) shell powder (one kind conventional neutralizer, mainly composed CaCO3) by neutralization method. results show that has relatively low pH (2.16) contains concentrations Fe (77.54 g/L), Mn (621.29 mg/L), Cu (6.54 Ca (12.39 Mg (55.04 mg/L). NaOH an effective neutralizer treat performed much better than powder. Various metals were precipitated, order Fe(III), Cu, Fe(II), Mn, Ca, Mg. removal mechanisms included precipitation, adsorption, co-precipitation. optimal reaction conditions duration selected 5 min mass ratio 0.16:1 (w:v). By this stage, rapidly increased 2.16 8.53 during AMD-NaOH interactions various efficiently removed (from 86.71% 99.99%) NaOH. residual Fe, after 1.52, 1.77, 0.10, 1.65, 2.17 mg/L, respectively. These data revealed good regent AMD, based on discharge criteria (GB28661 2012). Also, helpful adjustment copper removal. method advantages convenient operation, speed, effect, simple equipment, infrastructure cost. In addition, resulting neutralized residue is valuable high-quality raw material, which can used smelting separation.

Язык: Английский