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Assessment of potential resources and environmental pollution in tailings (slag) of Dachang antimony mine from Qinglong County, Guizhou Province (Vol. 41, No.3, 2021) TEXT SIZE: A A A

JIA Zhen-zhen1, PENG Yi-shu2, ZHANG Xu3, ZHANG Jian4, GAO Jun-bo2

(1. Guizhou Institute of Mountain Resource, Guiyang 550001, China;
2. College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550025, China;
3. School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China;
4. College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract: To understand the potential resources and contamination of the antimony tailings (slag), there were investigated to the distribution and accumulation of tailings (slag), and was carried out a field investigation in Dachang antimony mine, Qinglong country, Guizhou province. We were determined and analyzed the contents of heavy metals (i.e., Pb, Zn, As, Sb, Cr, Cu, Ni, Cd, and Hg) in tailings (slag) and their surrounding surface soil and the soil pH values. The results show that the potential resource of antimony and aurum can respectively reach 29700 t and 583 kg in Dachang antimony mine, Qinglong country, Guizhou province. The average value of pH in the surface soil around the tailings (slag) pile is 4.74 in the research area, which belongs to acidic soil. And the heavy metals As and Sb of the surface soil in the study area are polluted, and Cu, Zn, and Cd may be contaminated to a certain extent. In addition, the single factor pollution index method, numero comprehensive pollution evaluation method, and accumulation index method were used to comprehensively evaluate the pollution status of heavy metals in the surface soil near the tailings (slag) in this research area. Their results all showed that the heavy metal contamination in the surface soil in the study area was Sb and As. Therefore, there should be considered into the resource recovery and utilization of metal Sb and Au in the tailings (slag) in the research area. It could not only achieve the purpose of turning waste into treasure but also reduce the tailings (slag) and reduce their impact on the surrounding environment.

Keywords: pollution assessment; heavy metals; antimony ore tailings; potential resources; Qinglong; Guizhou Province

ACTA MINERALOGICA SINICA Vol. 41, No.3, 2021, page 312-318

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