Scholarlink

<p>Atmospheric fine particulate-bound mercury (PBM<sub>2.5</sub>) plays an important role in the biogeochemical behavior of atmospheric Hg. This study conducted seasonal sampling of PM<sub>2.5</sub> in a large, abandoned Hg mining area (Wanshan, WS) and an urban area (Bijiang, BJ) during the COVID-19 pandemic (2020–2023), aiming to elucidate the concentration levels, spatiotemporal distribution characteristics and potential sources of PBM<sub>2.5</sub>. The results indicate that implementing epidemic control measures had a positive effect on reducing PM<sub>2.5</sub> concentrations. Both BJ and WS exhibited distinct seasonal variations in PM<sub>2.5</sub>, with higher concentrations in winter and lower levels in summer. PBM<sub>2.5</sub> exhibited distinct seasonal characteristics, with higher concentrations in winter and spring, and lower levels in summer. During the epidemic prevention and control period, PBM<sub>2.5</sub> concentrations decreased significantly at BJ, whereas at WS they also declined but remained relatively high. The interannual PBM<sub>2.5</sub> concentrations at BJ and WS ranged from 194 (280) to 490 (590) pg·m<sup>–3</sup> and from 404 (465) to 804 (956) pg·m<sup>–3</sup>, respectively. Source apportionment revealed that historical Hg mining activities and nearby factories related to Hg recycling were the predominant contributors to PBM<sub>2.5</sub>. In addition, coal combustion, biomass burning and soil dust were significant contributors to PBM<sub>2.5</sub> in the study area. These findings provide essential scientific data for developing targeted environmental management policies for abandoned Hg mining areas.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Characteristics and source apportionment of atmospheric fine particulate-bound mercury (PBM2.5) in abandoned mercury mining areas in southwestern China

  • 期刊论文

  • 发表日期：

    2026年4月30日

查看全文
  • Yuling Kuang,
  • Longchao Liang,
  • Shasha Liu,
  • Xian Dong,
  • Fang Zhu,
  • Xiaohang Xu,
  • Zhuo Chen,
  • Yayun Li,
  • Yaji Li,
  • Guangle Qiu

摘要

Atmospheric fine particulate-bound mercury (PBM2.5) plays an important role in the biogeochemical behavior of atmospheric Hg. This study conducted seasonal sampling of PM2.5 in a large, abandoned Hg mining area (Wanshan, WS) and an urban area (Bijiang, BJ) during the COVID-19 pandemic (2020–2023), aiming to elucidate the concentration levels, spatiotemporal distribution characteristics and potential sources of PBM2.5. The results indicate that implementing epidemic control measures had a positive effect on reducing PM2.5 concentrations. Both BJ and WS exhibited distinct seasonal variations in PM2.5, with higher concentrations in winter and lower levels in summer. PBM2.5 exhibited distinct seasonal characteristics, with higher concentrations in winter and spring, and lower levels in summer. During the epidemic prevention and control period, PBM2.5 concentrations decreased significantly at BJ, whereas at WS they also declined but remained relatively high. The interannual PBM2.5 concentrations at BJ and WS ranged from 194 (280) to 490 (590) pg·m–3 and from 404 (465) to 804 (956) pg·m–3, respectively. Source apportionment revealed that historical Hg mining activities and nearby factories related to Hg recycling were the predominant contributors to PBM2.5. In addition, coal combustion, biomass burning and soil dust were significant contributors to PBM2.5 in the study area. These findings provide essential scientific data for developing targeted environmental management policies for abandoned Hg mining areas.