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- W3026033419 abstract "An environmentally friendly approach for the treatment of an acid effluent was proposed in this study, and the comprehensive treatment of an acid effluent containing antimony and arsenic was initiated by selective reduction and evaporative crystallization. Antimony was selectively recovered from the effluent by reduction using iron powder as reductant. The effects of temperature, iron dosage, and stirring speed on the reduction process were investigated, and the mechanism of antimony reduction prior to arsenic reduction was also studied from the viewpoints of thermodynamics and kinetics. The changes in potential during the reduction process and the cyclic voltammetry of the effluent demonstrated that reduction of H3AsO4 to HAsO2 occurred more easily than that of the other components of the effluent. The comparative assessment of reduction by nano iron powder and the SEM-EDS analysis of reduction product indicated that the kinetics of arsenic reduction were poor. Therefore, antimony was reduced faster than arsenic and recovered prior to arsenic. The effluent after antimony removal was disposed by evaporative crystallization. After evaporative crystallization, most of the hydrochloric acid was recycled and arsenic in the effluent was crystallized." @default.
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- W3026033419 date "2020-08-01" @default.
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- W3026033419 title "Comprehensive treatment of acid effluent containing antimony and arsenic by selective reduction and evaporative crystallization" @default.
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- W3026033419 doi "https://doi.org/10.1016/j.hydromet.2020.105366" @default.
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