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Extraction of metals from a zinc smelting slag using two-step procedure combining acid and ethylene diaminetetraacetic acid disodium

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Abstract

A two-step leaching method in combination of acid and ethylene diaminetetraacetic acid disodium (EDTA-Na2) was applied to extract metals such as Cd, Cu, Fe, Pb and Zn from a zinc smelting slag. The results show that the extraction rates of Cd, Cu, Fe and Zn in slag reach 88.3%, 54.1%, 69.6% and 54.7%, respectively, while the extraction rate of Pb is only 0.05% leached with 1.25 mol/L sulfuric acid under the conditions of the ratio of slag to liquid of 100 g/L, 65 °C and 120 r/min for 2 h. However, Pb extraction rate from 1.25 mol/L sulfuric acid leached residue reaches as high as 66.5% by using 0.1 mol/L EDTA-Na2 solution. The results indicate that two-step sequential extraction procedure combining 1.25 mol/L sulfuric acid and 0.1 mol/L EDTA-Na2 solution can extensively extract Cd, Cu, Fe, Pb and Zn from zinc smelting slag.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Kai-qi Jiang  (蒋凯琦), Zhao-hui Guo  (郭朝晖), Xi-yuan Xiao  (肖细元) & Long Zhang  (张珑)

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  1. Kai-qi Jiang  (蒋凯琦)
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  2. Zhao-hui Guo  (郭朝晖)
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  3. Xi-yuan Xiao  (肖细元)
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  4. Long Zhang  (张珑)
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Corresponding author

Correspondence to Xi-yuan Xiao  (肖细元).

Additional information

Foundation item: Project(2011SK3262) supported by Science and Technology Program of Hunan Province, China

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Jiang, Kq., Guo, Zh., Xiao, Xy. et al. Extraction of metals from a zinc smelting slag using two-step procedure combining acid and ethylene diaminetetraacetic acid disodium. J. Cent. South Univ. 19, 1808–1812 (2012). https://doi.org/10.1007/s11771-012-1212-1

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  • DOI: https://doi.org/10.1007/s11771-012-1212-1

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