200 mL of synthetic acid mine drainage (AMD) sample was poured into five 500 mL glass beakers and treated in a jar test and a shaker in sets of experiments respectively. The samples were treated in small-scale laboratory experiments using synthetic AMD sample dosed with bentonite clay and MgSO4 respectively, and a flocculent consisting of the same reagents. The pH, EC, turbidity and oxidation reduction potential were measured. The removal of turbid materials in the samples dosed with a flocculent is higher compared to those of the samples dosed with each reagent alone. The samples with flocculent dosage show high removal efficiency of natural organic compounds and toxic metals, slightly higher compared to those with a dosage of a combination of bentonite clay and MgSO4. The removal efficiency of the samples treated in a shaker is better than those with rapid mixing. The SEM micrographs shows sorption is physico-chemical phenomenon.


  • Removal efficiency of MgSO4 in combination with bentonite clay.

  • Removal efficiency of NOM using a flocculent.

  • Efficiency of the flocculent on acidic wastewater.

  • Treatment of AMD without pH adjustment.

  • Comparison of turbidity removal using mixing and shaking mechanisms.

Graphical Abstract

Graphical Abstract
Graphical Abstract
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Supplementary data