大气PM_(2.5)中重金属研究进展

近年来大气PM_(2.5)污染及其危害受到全球关注,我国污染现状尤其严重。作为重要的大气污染物成分,PM_(2.5)富集的重金属对生态环境和人体健康有较大威胁。该文分析总结了我国大气PM_(2.5)中重金属的研究现状,包括污染水平、时空分布特征、来源解析、化学形态、生物有效性和毒理健康效应等方面,提出了现阶段研究的不足,并对今后大气颗粒物污染及其成分研究进行展望,以利于环境空气质量的合理评价及其标准完善,为大气污染防治决策提供科学依据。

Research advance on heavy metals in atmospheric PM2.5

In recent years,atmospheric PM2.5 pollution and its adverse impacts are receiving more and more attention in the world.The present situation of air pollution is very serious in China.As an important component of atmospheric pollutants,heavy metals enriched in PM2.5 pose great threats to both the ecological environment and human health.The present paper summarized the research progress of heavy metals in atmospheric PM2.5 in China,including the pollution levels,characteristics of spatial and temporal distribution,source apportionment,chemical speciation,bioavailability,bioaccessibility,biological toxicity,human health effects and the directions of airborne particulate matters and their compositions were also proposed for future research.The information will be conducive to the rational evaluation of environmental air quality and its guideline improvement and providing scientific basis for the prevention and control of air pollution.