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Priority sources identification and risks assessment of heavy metal(loid)s in agricultural soils of a typical antimony mining watershed

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Priority sources identification and risks assessment of heavy metal(loid)s in agricultural soils of a typical antimony mining watershed
Heavy metal(loid)(HM)pollution in agricultural soils has become an environmental con-cem in antimony(Sb)mining areas.However,priority pollution sources identification and deep understanding of environmental risks of HMs face great challenges due to multiple and complex pollution sources coexist.Herein,an integrated approach was conducted to distinguish pollution sources and assess human health risk(HHR)and ecological risk(ER)in a typical Sb mining watershed in Southern China.This approach combines absolute prin-cipal component score-multiple linear regression(APCS-MLR)and positive matrix factoriza-tion(PMF)models with ER and HHR assessments.Four pollution sources were distinguished for both models,and APCS-MLR model was more accurate and plausible.Predominant HM concentration source was natural source(39.1％),followed by industrial and agricultural ac-tivities(23.0％),unknown sources(21.5％)and Sb mining and smelting activities(16.4％).Al-though natural source contributed the most to HM concentrations,it did not pose a signif-icant ER.Industrial and agricultural activities predominantly contributed to ER,and atten-tion should be paid to Cd and Sb.Sb mining and smelting activities were primary anthro-pogenic sources of HHR,particularly Sb and As contaminations.Considering ER and HHR assessments,Sb mining and smelting,and industrial and agricultural activities are critical sources,causing serious ecological and health threats.This study showed the advantages of multiple receptor model application in obtaining reliable source identification and provid-ing better source-oriented risk assessments.HM pollution management,such as regulating mining and smelting and implementing soil remediation in polluted agricultural soils,is strongly recommended for protecting ecosystems and humans.

AntimonyHeavy metal(loid)Risk assessmentPollution sourcesMining and smelting

Lianhua Liu、You Li、Xiang Gu、Roberto Xavier Supe Tulcan、Lingling Yan、Chunye Lin、Junting Pan

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Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081,China

Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China

School of Environment,Beijing Normal University,Beijing 100875,China

Yiyang Academy of Agricultural Sciences,Yiyang 413099,China

Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China

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Antimony Heavy metal(loid) Risk assessment Pollution sources Mining and smelting

2025

10.1016/j.jes.2023.11.007

环境科学学报(英文版)
中科院生态环境研究中心

环境科学学报(英文版)

影响因子：0.862
ISSN：1001-0742
年,卷(期)：2025.147(1)