Insights into the source-specific health risk of ambient particle-bound metals in the Pearl River Delta region, China

Ecotoxicology and Environmental Safety

Qiansheng Hu¹  Shaojie Fu²  Hedi Zhang²  Qing Wei²  Weiwei Lin²  Luan Yuan²  Lingyan He³  Dejian Mai⁴  Yan Zhao⁴  Yuhong Zhai⁴  Dingli Yue⁴ 

[1] Correspondence to: Department of Occupational and Environmental Health, School of Public Health, Sun Yat-Sen University, Yuexiu District, Guangzhou 510080, China.;Department of Occupational and Environmental Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China;Experimental Teaching Center, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China;Guangdong Ecological and Environmental Monitoring Center, State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangzhou 510308, China;

关键词: PM2.5;    Risk assessment;    Carcinogenic risk;    Non-carcinogenic risk;    Source apportionment;   

DOI  :  

来源: DOAJ

【 摘 要 】

Quantification of source-specific health risks of PM2.5 plays an essential role in health-oriented air pollution control. However, there is limited evidence supporting the source-based risk apportionment of particle-bound metals. In this study, source-specific cancer and non-cancer risk characterization of 12 particle-bound metals was performed in the Pearl River Delta (PRD) region, China. A combination of health risk assessment model and receptor-based source apportionment modeling with positive matrix factorization (PMF) was applied for characterizing the spatial-temporal patterns for inhalation health risks of particle-bound metals in three main city clusters, inland area and coastal area in the region from December 2014 through July 2016. Results showed that the carcinogenic risk of particle-bound metals for adults (4.13 × 10-5) was higher than that for children (9.53 × 10-6) in the PRD region. The highest and significant non-carcinogenic risk was found in the northwest city cluster. Industrial emission (63.3%) were the dominant contributors to the cancer risk, while the main contributors to the non-cancer risk were the vehicle emission source (33.2%) in the dry season and industrial emission (30.8%) in the wet season. Our results provide important evidence for spatial source-specific health risks with temporal characteristics of particle-bound metals in most densely populated areas in the southern China, and suggest that reduction of industrial and vehicle emissions could facilitate more cost-effective PM2.5 control measures to improve human health.

【 授权许可】

Unknown