Abstract
Antimony (Sb) has received increasing environmental concerns due to its potential toxicity and carcinogenic property. In the present work, the flocculation process had used to treat dressing wastewater (DW) from some antimony mine, and the mechanism of removing Sb was investigated. The study focused on the effect of experimental parameters on the Sb removal efficiency, such as dosage of flocculant, pH value and the settling time. Several flocculants were evaluated and the results suggested that ferrous sulfate heptahydrate (FeSO4•7H2O) was the optimal choice. When the dosage of ferrous sulfate heptahydrate (FeSO4•7H2O) was 0.075:100, pH value was 7 and the settling time was 180 min, removal efficiency of Sb in the DW reached 99.86% and concentration of Sb in the treated wastewater was below 0.04mg/L, which meets the emission standards established by State Department of Environmental Protection and State Administration for Quality Supervision and Inspection and Quarantine.
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