摘要
微塑料污染是当前环境科学关注的研究热点.为探究国家一级水源保护区丹江口水库中微塑料的赋存状况,以水库及其入库支流表层水体为对象,于2019年丰水期进行采样调查分析,研究该区域的微塑料丰度、形状和类型,并结合丹江口水库的水文水动力条件揭示其微塑料空间分布特征.结果表明,丹江口水库水体中微塑料颜色各异,主要形状有颗粒、碎片、薄膜以及纤维类这4类,其中碎片类占比为84.2%,棕色和透明微塑料最为常见,而不同形状微塑料丰度空间分布差异明显;丰水期,水库库区微塑料平均丰度7 248 n·m^(-3),丹库的微塑料含量显著高于汉库;库区与支流中微塑料粒径大小主要在75~4 703μm之间,微塑料丰度随粒径的增加而下降,其中73.4%的微塑料粒径在500μm以下;就微塑料材质而言,尼龙在丹江口水库中最普遍,数量比例为36.4%;其次是聚乙烯(PE)和聚丙烯(PP)等.
Microplastic pollution is a hot topic in environmental science.To explore the microplastics in Danjiangkou Reservoir,a national first-class water source protection area,we studied their types,abundance,and material characteristics using density flotation and micro-Raman spectroscopy.The spatial distribution characteristics of microplastics were also revealed according to the hydrologic and hydrodynamic conditions of the reservoir.The results showed that the main types of microplastics were fragments(84.2% of the total),granules,films,and fibers,of which 84.2% were fragments.The numbers of each type of microplastic were significantly different in different areas.A variety of colors were observed,with transparent and brown microplastic being most common.During the wet season,the average abundance of microplastics in the reservoir was 7 248 n·m^(-3),which is higher than that observed in the Han Reservoir.The particle sizes of the microplastics in the research area ranged 75-4 703 μm,of which 73.4% had a particle size of less than 500 μm;microplastic abundance was inversely related to particle size.Nylon was the most common form of microplastic in Danjiangkou Reservoir,accounting for 36.4% of the total,followed by polyethylene(PE) and polypropylene(PP).
作者
潘雄
林莉
张胜
翟文亮
陶晶祥
李丹文
PAN Xiong;LIN Li;ZHANG Sheng;ZHAI Wen-liang;TAO Jing-xiang;LI Dan-wen(Basin Water Environmental Research Department,Changjiang River Scientific Research Institute,Wuhan 430010,China;Key Laboratory of Basin Water Resource and Eco-Environmental Science in Hubei Province,Wuhan 430010,China;School of Environmental Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第3期1372-1379,共8页
Environmental Science
基金
中央级公益性科研院所基本科研业务费项目(CKSF2019380/SH,CKSF2017062/SH)。
关键词
丹江口水库
微塑料
表层水体
入库支流
分布特征
Danjiangkou Reservoir
microplastics
surface water
tributaries
distribution
