Scholarlink

<p>We analyzed polycyclic aromatic hydrocarbons (PAHs) in coal-hauling road dust (CRD), rural road dust (RRD), and urban road dust (URD) collected in Shenmu City, Shanxi Province, China, using GC–MS. A total of 37 aromatic compounds were identified. Total PAH concentrations in CRD ranged from 1672.6 to 66149.9&#xa0;ng/g (mean: 15845.7&#xa0;ng/g), which were significantly higher than those in RRD (348.1–2539.1&#xa0;ng/g; mean: 1062.4&#xa0;ng/g) and URD (442.9–1181.6&#xa0;ng/g; mean: 812.3&#xa0;ng/g). The distribution patterns of alkyl PAHs in CRD suggested petrogenic and mixed sources, whereas those in RRD and URD were dominated by pyrolytic inputs. Diagnostic ratios further indicated mixed sources for PAHs in CRD, whereas PAHs in RRD and URD were more strongly influenced by pyrolytic sources. The Positive Matrix Factorization (PMF) model indicated that PAHs in CRD were mainly contributed by coal dust/particle dispersion (53.3%), followed by coal/biomass combustion (19.8%), diesel vehicle exhaust (17.4%), and gasoline vehicle exhaust (9.5%). In contrast, PAHs in RRD and URD were mainly attributed to coal/biomass combustion (39.2%), followed by coal dust/particle dispersion (31.5%), diesel vehicle exhaust (15.8%), and gasoline vehicle exhaust (13.5%). Health risk assessment suggested that CRD posed a carcinogenic risk but did not pose a non-carcinogenic risk, whereas RRD and URD posed no appreciable health risks. However, these risk estimates may be underestimated because alkylated PAHs were not included. Effective measures should be implemented to control PAH emissions during coal transportation, thereby mitigating potential impacts on the environment and public health.</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

Analysis and Source Apportionment of Polycyclic Aromatic Hydrocarbons (PAHs) in Road Dusts from Different Functional Areas of a Typical Coal Mining City

  • 期刊论文

  • 发表日期：

    2026年3月21日

查看全文
  • Xiulong Gao,
  • Zhonggeng Luo,
  • Ming Liang,
  • Handong Liang

摘要

We analyzed polycyclic aromatic hydrocarbons (PAHs) in coal-hauling road dust (CRD), rural road dust (RRD), and urban road dust (URD) collected in Shenmu City, Shanxi Province, China, using GC–MS. A total of 37 aromatic compounds were identified. Total PAH concentrations in CRD ranged from 1672.6 to 66149.9 ng/g (mean: 15845.7 ng/g), which were significantly higher than those in RRD (348.1–2539.1 ng/g; mean: 1062.4 ng/g) and URD (442.9–1181.6 ng/g; mean: 812.3 ng/g). The distribution patterns of alkyl PAHs in CRD suggested petrogenic and mixed sources, whereas those in RRD and URD were dominated by pyrolytic inputs. Diagnostic ratios further indicated mixed sources for PAHs in CRD, whereas PAHs in RRD and URD were more strongly influenced by pyrolytic sources. The Positive Matrix Factorization (PMF) model indicated that PAHs in CRD were mainly contributed by coal dust/particle dispersion (53.3%), followed by coal/biomass combustion (19.8%), diesel vehicle exhaust (17.4%), and gasoline vehicle exhaust (9.5%). In contrast, PAHs in RRD and URD were mainly attributed to coal/biomass combustion (39.2%), followed by coal dust/particle dispersion (31.5%), diesel vehicle exhaust (15.8%), and gasoline vehicle exhaust (13.5%). Health risk assessment suggested that CRD posed a carcinogenic risk but did not pose a non-carcinogenic risk, whereas RRD and URD posed no appreciable health risks. However, these risk estimates may be underestimated because alkylated PAHs were not included. Effective measures should be implemented to control PAH emissions during coal transportation, thereby mitigating potential impacts on the environment and public health.