夏秋季节石家庄南郊大气颗粒物PM_(2.5)和PM_(10)中微塑料的赋存特征  

Occurrence characteristics of microplastics in atmospheric particulate matter PM_(2.5)and PM_(10)in the southern suburbs of Shijiazhuang in summer and autumn

作　　者：李双江[1,2] 周建文 叶彤 程天伟 杨窈 崔建升 王立新[1,2] LI Shuangjiang;ZHOU Jianwen;YE Tong;CHENG Tianwei;YANG Yao;CUI Jiansheng;WANG Lixin(College of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018;Hebei Key Laboratory of Pollution Prevention Biotechnology,Shijiazhuang 050018)

机构地区：[1]河北科技大学环境科学与工程学院,石家庄050018 [2]河北省污染防治生物技术重点实验室,石家庄050018

出　　处：《环境科学学报》2025年第3期13-22,共10页Acta Scientiae Circumstantiae

基　　金：河北省自然科学基金(No.B2024208026)。

摘　　要：微塑料作为典型的新污染物广泛存在于大气、水体和土壤环境介质中,会对人体健康构成潜在威胁.其中,呼吸道吸入是人类接触微塑料的主要途径之一,目前对大气中微塑料的研究多集中在大气沉降物,而较少关注可吸入颗粒物PM_(2.5)和PM_(10)中微塑料的季节分布特征.本研究以石家庄南郊为例,探究了夏、秋季节大气PM_(2.5)和PM_(10)中微塑料形状、尺寸、丰度和种类的区别以及微塑料丰度与气象条件之间的关系.结果表明:①夏、秋季节石家庄南郊颗粒物样品中微塑料普遍存在,微塑料多为碎片状(90.2%~94.34%),少部分呈纤维状(5.7%~9.8%);②夏季和秋季PM_(2.5)中微塑料的丰度范围分别为2.62~10.21 N·m^(-3)和4.04~10.05 N·m^(-3),PM_(10)中微塑料的丰度范围分别为3.54~13.07 N·m^(-3)和4.37~13.25 N·m^(-3).相对于夏季,秋季PM_(2.5)和PM_(10)样品中的微塑料丰度分别显著提高了6.06%和14.98%;③夏、秋季节共鉴定出6种微塑料,分别为聚碳酸酯(PC)、丙烯腈-丁二烯-苯乙烯共聚物(ABS)、聚丙烯(PP)、聚乙烯(PE)、聚苯乙烯(PS)和聚氯乙烯(PVC);④微塑料丰度与PM_(2.5)、PM_(10)浓度之间存在显著的正相关关系,与温度和风级之间呈显著的负相关性.本研究可为PM_(2.5)和PM_(10)作为微塑料载体提供数据支撑,同时也为石家庄大气中微塑料暴露健康风险研究提供参考.As one of the typical emerging pollutants,microplastics have been widely detected in the atmosphere,water,and soil media in environment,which can pose a potential risk for human health.Thereinto,respiratory inhalation is one of the main ways for humans to contact with microplastics.Previous researches were mainly focused on the microplastics in atmospheric deposition,while the distribution characteristics and seasonal variation of microplastics in inhalable PM_(2.5)and PM_(10)was still lack off.In this paper,the southern suburbs of Shijiazhuang was adopted as a sample to investigate the differences in the shape,size,abundance and type of microplastics in atmospheric PM_(2.5)and PM_(10)in different seasons,and the relationship between the abundance of microplastics and meteorological conditions.The results showed that:①Microplastics were prevalent in samples from the southern suburbs of Shijiazhuang in summer and autumn.Microplastics in PM_(2.5)and PM_(10)generally existed in form of fragments(90.2%~94.34%),and a small part existed in form of fibers(5.7%~9.8%).②The abundance of microplastics in PM_(2.5)in summer and autumn ranged from 2.62 to 10.21 N·m^(-3)and from 4.04 to 10.05 N·m^(-3),respectively.While the abundance of microplastics in PM_(10)in summer and autumn ranged from 3.54 to 13.07 N·m^(-3)and from 4.37 to 13.25 N·m^(-3),respectively.Compared with summer,the abundance of microplastics in PM_(2.5)and PM_(10)samples in autumn was significantly increased by 6.06%and 14.98%,respectively.③Six kinds of polymer type were identified in microplastics including polycarbonate(PC),acrylonitrile-butadiene-styrene copolymer(ABS),polypropylene(PP),polyethylene(PE),polystyrene(PS)and polyvinyl chloride(PVC).④The abundance of microplastics was significantly positively correlated with PM_(2.5)and PM_(10)concentrations,and significantly negatively correlated with temperature and wind speed.This paper is expected to provide data support for PM_(2.5)and PM_(10)as microplastic carriers,and provide a reference for

关 键 词：微塑料 PM_(2.5) PM_(10) 季节变化 赋存特征 石家庄 

分 类 号：X831[环境科学与工程—环境工程]