Maokuan1,2, Zhang Guoping1,Wang Qingyun1,2,Wu Zaicheng1,2,zhouying1,2
(1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002;
2. University of Chinese Academy of Sciences, Beijing 100049)
Abstract：The smelting slags near Dachang antimony mines in Qinglong, Guizhou province and Yawan antimony mine smelter in Xihe, Gansu Province are collected for research. The collected samples were characterized by XRF, XRD and Tessier sequential extraction. The effect of pH on the leaching of Sb and As was studied, and the mechanism for the leaching of Sb and As was discussed. The results show that the contents of Sb in the slags of Dachang and Yawan antimony mines were 5447 and 24666 mg/kg, respectively, and those of As were 472 and 240 mg/kg, respectively. Sb and As existed mainly in the residual fraction. The leaching of Sb and As in the sample was significantly influenced by pH. At different pH values, the leaching of Sb and As differed significantly. This was suggested to be closely related to the dissolution of minerals, the adsorption and desorption of elements, and the chemical occurrence of elements.
Key words：antimony; arsenic; slag; pH; leaching
EARTH AND ENVIRONMENT Vol.51, No.1, Tot No.351, 2023, Page 102
