土壤学报2025，Vol.62Issue(6)：1699-1710,12.DOI:10.11766/trxb202412240507
典型森林和草原生态系统土壤多环芳烃污染现状和源解析
Pollution Status and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Soil of Typical Forest and Grassland Ecosystems
摘要
Abstract
[Objective]Industrialization and urbanization have led to the emission of pollutants that can migrate and impact the functions of natural ecosystems.Therefore,it is important to understand the environmental behavior and fate of these pollutants as well as the factors influencing their ecotoxicity.This study aims to investigate the characteristics,sources,and environmental impact of polycyclic aromatic hydrocarbons(PAHs),a class of persistent organic pollutants,in the soil of typical forest and grassland ecosystems.[Method]Soil samples were collected from five typical forests and three typical grassland ecosystems in China.Soil physicochemical properties and PAH concentrations were measured,and the composition of PAHs was analyzed.The source apportionment of PAHs was carried out using diagnostic ratio methods and positive matrix factorization methods.[Result]The total PAH concentrations in the soil of grassland ecosystems ranged from 7.11 to 137.42 μg·kg-1,while in forest ecosystems,it ranged from 10.87 to 976.47 μg·kg-1.The highest PAH level(208.82-976.47 μg·kg-1)was detected in Beijing Xishan Forest.Traffic emissions and coal combustion were the main sources of soil PAHs in forest ecosystems,contributing 41.6%-55.9%and 18.3%-31.8%,respectively.In grassland ecosystems,coal combustion was the dominant contributor to the content of PAHs in soil,accounting for 39.6%-50.2%,except in Zhangbei Grassland,where traffic emissions prevailed.Biomass combustion contributed more to PAHs in grassland soils than in forest soils.[Conclusion]Although soil PAH levels in most natural ecosystems remain relatively low,the influence of human activities on PAH pollution in these ecosystems cannot be overlooked.Continuous efforts in pollutant emission reduction and environmental risk management are essential to protect the functions of natural ecosystems.关键词
多环芳烃/污染源解析/森林生态系统/草原生态系统/交通排放源/燃煤源Key words
Polycyclic aromatic hydrocarbons(PAHs)/Source apportionment/Forest ecosystems/Grassland ecosystems/Traffic emissions/Coal combustion分类
资源环境引用本文复制引用
LI Yuqian,LI Yijia,MA Junwei..典型森林和草原生态系统土壤多环芳烃污染现状和源解析[J].土壤学报,2025,62(6):1699-1710,12.基金项目
国家自然科学基金项目(52039001,52470174)和中国博士后科学基金面上项目(2023M743341)共同资助 Supported by the National Natural Science Foundation of China(Nos.52039001 and 52470174),and the Postdoctoral Science Foundation of China(No.2023M743341) （52039001,52470174）
