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<p>Mine tailings derived from the beneficiation of metallic and non-metallic minerals contain varying concentrations of toxic elements, having an adverse impact on the geo-environment. Number of studies have investigated the environmental toxicity associated with metallic mineral mine sludge unlike similar studies pertaining to the silica sand tailings. The present study reports the first comprehensive data on the silica sand tailings from the Shankargarh area, India, based on their physical and geochemical characterization using a combination of field and laboratory-based (colour, magnetic susceptibility, XRD, FTIR, SEM, and XRF) techniques. All the samples showed identical colour and their mass magnetic susceptibility values exhibited Limited variations, ranging from 14 to 22 (10<sup>–8</sup> m<sup>3</sup>kg<sup>−1</sup>), while XRD and FTIR analyses indicated their consistent mineralogy (quartz, kaolinite, hematite, and illite). The SEM image analysis of tailing samples revealed a maximum grain size of up to 70&#xa0;µm, with approximately 90% of the particles falling within the size range of 1 to 10&#xa0;µm (Group 1 carcinogens). The marked elevated concentrations of various toxic elements (e.g., Cr, Co, Ni, Cu, Zn, As, and Pb) in the silica sand tailings from Shankargarh, compared to the WHO permissible limits, and the presence of harmful respirable particulate matter (~ PM<sub>2-10</sub>) pose a serious threat to the ecology and environment of the area.</p>

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Assessment of toxicity in silica sand tailings—a case study of Shankargarh area of Prayagraj, India

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Shivanshu Dwivedi,
  • Mridul Yadav,
  • Anuj Kumar Singh,
  • Anup Kumar Sharma,
  • Manoj Kumar Jaiswal,
  • Mrigank Mauli Dwivedi,
  • Kamlesh Pandey,
  • Gautam Kumar Yadav,
  • Jayanta Kumar Pati

摘要

Mine tailings derived from the beneficiation of metallic and non-metallic minerals contain varying concentrations of toxic elements, having an adverse impact on the geo-environment. Number of studies have investigated the environmental toxicity associated with metallic mineral mine sludge unlike similar studies pertaining to the silica sand tailings. The present study reports the first comprehensive data on the silica sand tailings from the Shankargarh area, India, based on their physical and geochemical characterization using a combination of field and laboratory-based (colour, magnetic susceptibility, XRD, FTIR, SEM, and XRF) techniques. All the samples showed identical colour and their mass magnetic susceptibility values exhibited Limited variations, ranging from 14 to 22 (10–8 m3kg−1), while XRD and FTIR analyses indicated their consistent mineralogy (quartz, kaolinite, hematite, and illite). The SEM image analysis of tailing samples revealed a maximum grain size of up to 70 µm, with approximately 90% of the particles falling within the size range of 1 to 10 µm (Group 1 carcinogens). The marked elevated concentrations of various toxic elements (e.g., Cr, Co, Ni, Cu, Zn, As, and Pb) in the silica sand tailings from Shankargarh, compared to the WHO permissible limits, and the presence of harmful respirable particulate matter (~ PM2-10) pose a serious threat to the ecology and environment of the area.