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The improvement of turbidity in a dolomite mine dust screen water by coagulation and precipitation and the feasibility of neutralizing acid mine drainage (AMD) using the dust were investigated. The simulated dust screen water was prepared using S dolomite mine dust for experiments. The water shows 1,558 NTU of turbidity and pH 8.51. The median diameter (D50) of dust was 16.4 μm and the particle size distributes from 10 μm to 30 μm. Regardless of the coagulants, 90% of turbidity was improved at pH 3 and 5. The inorganic coagulant, PAC, and the organic coagulant, Nalco 9601, show good improvement efficiencies of turbidity at pH 7 and 11, respectively. In the experiment to neutralize acid mine drainage, dolomite dust increased the AMD pH from 2.89 to 6.7 for 10 min, and removed 100% of the dissolved Fe and Al.

The Improvement of Turbidity and the AMD Neutralization Applicability Assessment of the Dolomite Mine Dust Screen Water