Risks of heavy metal contamination in soils of coal mining community and traceability based on PMF-HHR model
ZHANG Xiao-jing1,3, ZHANG Sheng-wei1,2,3, LU Jun-ping1, XU Zhuo1, XU Jia-xuan4, LI Xiao-yang1, ZHANG Xiao-duo1
1. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Key Laboratory of Water Resources Protection and Utilization of Inner Mongolia Autonomous Region, Hohhot 010018, China; 3. Autonomous Region Collaborative Innovation Center for Integrated Management of Water Resources and Water Environment in the Inner Mongolia Reaches of the Yellow River, Hohhot 010018, China; 4. Inner Mongolia Xinchuang Environmental Technology Co., Hohhot 010010, China
摘要 To clarify the pollution sources and ecological health risks of heavy metals in soils influenced by coal mining activities, a typical coal mine in Yjinholuo Banner of Inner Mongolia was selected as the study area. A total of 180 surface soil samples were collected from the mining area between 2021 and 2023, and the concentrations of eight types of heavy metals were analyzed. The positive definite matrix factor decomposition model coupled with health risk assessment (PMF-HHR) was used to quantitatively evaluate the human health risks associated with heavy metals from different sources. The pollution of Cd and Hg in the study area is particularly serious, with Cd content in open-pit mines reaching 18 times the background levels of Inner Mongolia, the content of Hg in underground mines being 4.8 times higher, and higher levels of Cd, Cr and Ni in open pit mines than in shaft mines. The heavily polluted areas are mainly located in coal mining areas and along highways. The soil around the mine posed a moderate ecological hazard, with forestland, grassland and farmland showing high-risk levels. PMF source analysis identified five major pollution sources: combined industrial emissions and atmospheric deposition (18.0%), transportation (12.6%), agricultural activities and coal combustion (14.8%), mining (17.0%), and natural parent sources (37.6%). There was a notable cancer risk for both adults and children, with a higher risk observed in children. The main sources of cancer risk were industrial emissions and transportation, with oral ingestion being the dominant exposure pathway. The PMF-HHR model can effectively quantify the health risks from different sources.
Abstract：To clarify the pollution sources and ecological health risks of heavy metals in soils influenced by coal mining activities, a typical coal mine in Yjinholuo Banner of Inner Mongolia was selected as the study area. A total of 180 surface soil samples were collected from the mining area between 2021 and 2023, and the concentrations of eight types of heavy metals were analyzed. The positive definite matrix factor decomposition model coupled with health risk assessment (PMF-HHR) was used to quantitatively evaluate the human health risks associated with heavy metals from different sources. The pollution of Cd and Hg in the study area is particularly serious, with Cd content in open-pit mines reaching 18 times the background levels of Inner Mongolia, the content of Hg in underground mines being 4.8 times higher, and higher levels of Cd, Cr and Ni in open pit mines than in shaft mines. The heavily polluted areas are mainly located in coal mining areas and along highways. The soil around the mine posed a moderate ecological hazard, with forestland, grassland and farmland showing high-risk levels. PMF source analysis identified five major pollution sources: combined industrial emissions and atmospheric deposition (18.0%), transportation (12.6%), agricultural activities and coal combustion (14.8%), mining (17.0%), and natural parent sources (37.6%). There was a notable cancer risk for both adults and children, with a higher risk observed in children. The main sources of cancer risk were industrial emissions and transportation, with oral ingestion being the dominant exposure pathway. The PMF-HHR model can effectively quantify the health risks from different sources.
张晓晶, 张圣微, 卢俊平, 徐卓, 许嘉轩, 李晓阳, 张晓铎. 煤矿聚集区土壤重金属污染风险及PMF-HHR模型溯源[J]. 中国环境科学, 2024, 44(11): 6291-6301.
ZHANG Xiao-jing, ZHANG Sheng-wei, LU Jun-ping, XU Zhuo, XU Jia-xuan, LI Xiao-yang, ZHANG Xiao-duo. Risks of heavy metal contamination in soils of coal mining community and traceability based on PMF-HHR model. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(11): 6291-6301.
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