雨水径流中微塑料的赋存规律探究  

INVESTIGATION OF OCCURRENCE REGULARITY OF MICROPLASTICS IN RAINWATER RUNOFF

作　　者：仇付国[1] 梁安棋 童诗雨 王淳 QIU Fuguo;LIANG Anqi;TONG Shiyu;WANG Chun(Key Laboratory of Urban Stormwater System and Water Environment of Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学城市雨水系统与水环境教育部重点实验室,北京100044

出　　处：《环境工程》2024年第7期106-112,共7页Environmental Engineering

基　　金：国家自然科学基金(51278024)。

摘　　要：为明确雨水径流中微塑料的赋存情况,选取高校生活区、公路和生活小区为采样点,对实际雨水径流进行样品采集,采用密度分离法对雨水样品进行预处理,使用安捷伦LDIR-8700激光红外成像光谱仪对水样中微塑料的丰度、类型及粒径进行检测与分析。在所有样品中均检测到微塑料的存在,微塑料的丰度与降雨事件前干旱天数有关,随着干旱天数的增加,微塑料的丰度也随之增加。微塑料的类型与采样点的社会生活功能有关。将微塑料粒径分为0~30,30~50,50~100,100~200μm和>200μm 5个区间,3个采样点检测出微塑料的粒径均以0~50μm为主,表明大粒径塑料会受自然外力的影响不断破碎形成小粒径微塑料。研究结果可为雨水中微塑料的检测方法以及水环境中微塑料的来源提供数据支持。To clarify the occurrence of microplastics in rainwater runoff,the sampling points in a university campus,a road,and a residential community were selected to collect samples of actual rainwater runoff.The density separation method was used to pretreat the rainwater samples,and the abundance,type and particle size of microplastics in the water samples were detected and analyzed,using an Agilent LDIR-8700 laser infrared imaging spectrometer.The presence of microplastics was detected in all samples.The abundance of microplastics was related to the number of dry days before the rainfall event,and increased with the number of dry days.The types of microplastics were related to the social life functions of the sampling sites.The particle sizes of microplastics were divided into five intervals:0 to 30μm,30 to 50μm,50 to 100μm,100 to 200μm,and 200μm above.The particle sizes of microplastics detected at the three sampling sites were mainly in the range of 0 to 50μm,indicating that large-size plastics would be continuously broken to form small-size microplastics by the influence of natural external forces.The results can provide data support for the detection methods of microplastics in rainwater and the sources of microplastics in water environment.

关 键 词：雨水径流 微塑料 高校校园 公路 生活小区 

分 类 号：X52[环境科学与工程—环境工程]