首页|Persistent organic pollutants in global surface soils:Distributions and fractionations

Persistent organic pollutants in global surface soils:Distributions and fractionations

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The distribution and fractionation of persistent organic pollutants(POPs)in different matrices refer to how these pollutants are dispersed and separated within various environmental compartments.This is a significant study area as it helps us understand the transport efficiencies and long-range transport po-tentials of POPs to enter remote areas,particularly polar regions.This study provides a comprehensive review of the progress in understanding the distribution and fractionation of POPs.We focus on the contributions of four intermedia processes(dry and wet depositions for gaseous and particulate POPs)and determine their transfer between air and soil.These processes are controlled by their partitioning between gaseous and particulate phases in the atmosphere.The distribution patterns and fractionations can be categorized into primary and secondary types.Equations are developed to quantificationally study the primary and secondary distributions and fractionations of POPs.The analysis results suggest that the transfer of low molecular weight(LMW)POPs from air to soil is mainly through gas diffusion and particle deposition,whereas high molecular weight(HMW)POPs are mainly via particle deposition.HMW-POPs tend to be trapped near the source,whereas LMW-POPs are more prone to undergo long-range atmo-spheric transport.This crucial distinction elucidates the primary reason behind their temperature-independent primary fractionation.However,the secondary distribution and fractionation can only be observed along a temperature gradient,such as latitudinal or altitudinal transects.An animation is produced by a one-dimensional transport model to simulate conceptively the transport of CB-28 and CB-180,revealing the similarities and differences between the primary and secondary distributions and fractionations.We suggest that the decreasing temperature trend along latitudes is not the major reason for POPs to be fractionated into the polar ecosystems,but drives the longer-term accumulation of POPs in cold climates or polar cold trapping.

POPsPrimary and secondary sourcesPrimary and secondary emissionsPrimary and secondary distribution patternsPrimary and secondary fractionations

Dou Wang、Guiling Yang、Xiao Yun、Ting Luo、Hao Guo、Liying Pan、Wei Du、Yanhua Wang、Qiang Wang、Pu Wang、Qinghua Zhang、Yun Li、Nan Lin

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State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Laboratory(Hangzhou)for Risk Assessment of Agricultural Products of Ministry of Agriculture,Institute of Agro-product Safety and Nutrition,Zhejiang Academy of Agricultural Sciences,Hangzhou,310021,Zhejiang,China

College of Urban and Environmental Sciences,Peking University,Beijing,100871,China

Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control,Faculty of Environmental Science & Engineering,Kunming University of Science &Technology,Kunming,650500,China

Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,School of Environment and Health,Jianghan University,Wuhan,430056,China

State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China

Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture,Institute of Quality Standards and Testing Technology for Agro-Products,Chinese Academy of Agricultural Sciences,Beijing,100081,China

Department of Environmental Health,School of Public Health,Shanghai Jiao Tong University,Shanghai,200025,China

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国家自然科学基金State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of TechnologySpecial Project for Sustainable Development Science Technology in ShenzhenHeilongjiang Touyan Innovation Team Program黑龙江省自然科学基金

420773412022TS05KCXFZ20201221173000001LH2021E096

2024

10.1016/j.ese.2023.100311

环境科学与生态技术(英文)

环境科学与生态技术(英文)

ISSN：
年,卷(期)：2024.18(1)
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