Aysel Şen, Levent Kartal
Metal sulphide precipitation is a fast, easy and environmentally friendly method which provides to work in wide pH ranges and to reuse/recycle them in metal smelting processes. In this research, the selective sulphide precipitations (SSP) of copper, nickel and zinc from industrial wastewater were investigated by using Na2S as the sulphur resource. The effects of pH and free sulphide concentration on the SSP were examined in two types of solutions; synthetically prepared wastewater and industrially supplied one from a gold refinery. The highest precipitation yields of Cu, Ni, and Zn were determined in the synthetic solution at the pH values of 2.3, 5.3, and 5.3, respectively. The precipitation efficiencies increased with increasing Na2S amount and reached its maximum at the ratio of 1:1.75 (Metal: Na2S in molar ratio). The refining wastewater, containing 10 g/L Cu2+, 0.3 g/L Ni2+ and 3 g/L Zn2+ ions, were treated at pH 2.3 and copper was precipitated as CuS with almost 100% of efficiency. In pH 5.3, the residual nickel and zinc ion concentration in the solution was decreased to 4 mg/L and 6 mg/L with the 44% and 52% of precipitation efficiencies, respectively.
@article{369df852-ffad-427f-8868-45b701bca68c,
title={Selective Sulphide Precipitation of Copper, Nickel and Zinc from Industrial Wastewater},
author={Aysel Şen and Levent Kartal},
year={2016},
language={en}
}TY - JOUR TI - Selective Sulphide Precipitation of Copper, Nickel and Zinc from Industrial Wastewater AU - Aysel Şen AU - Levent Kartal PY - 2016 LA - en ER -
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