ZENGYifan,QIUJiekai,WANG Jing,et al.Occurrence Levels and Ecological Risk Assessment of Microplastics in Different Water Sources in a City of East China[J].China Water & Wastewater,2026,42(5):26-34.
华东某市水源水中微塑料的赋存水平及生态风险评估
- Title:
- Occurrence Levels and Ecological Risk Assessment of Microplastics in Different Water Sources in a City of East China
- Keywords:
- water source; microplastics; micro-FTIR; occurrence characteristics
- 摘要:
- 作为新污染物之一的微塑料在饮用水中的赋存情况日益引起关注，给水厂出水中微塑料的丰度取决于水源水中的微塑料存在水平。基于华东地区某城市的不同水源水 （水库A、B、C及给水厂L进水）和显微红外法，探讨了其微塑料的赋存水平及时空分布特征。结果表明，水库A、B、C原水及给水厂L进水的微塑料丰度分别为（8.89±2.78）、（6.81±2.64）、（12.50±4.17）、（10.14±4.31） 个/L，且相较于夏季，冬季的微塑料丰度偏高；水库水中的微塑料主要呈颗粒状，其类型均以聚氯乙烯（PVC）、聚对苯二甲酸乙二醇酯（PET）为主，给水厂L进水中的微塑料主要呈纤维状，其类型以聚苯乙烯（PS）和PET为主。各类水源水中微塑料的颜色以白色和透明为主，尺寸小于1 000 μm的占比最大。给水厂L进水中微塑料的聚合物种类、颜色比水库水更加丰富。水源在冬季具有更高的微塑料生态风险，值得注意的是，水库C水中的微塑料潜在生态风险等级最高（水库C>水库A>给水厂L>水库B）。研究成果可为水源地的截污管理及其水质保护提供理论依据。
- Abstract:
- As an emerging contaminant, the presence of microplastics in drinking water has garnered increasing attention. The concentration of microplastics in the finished water of water supply plants is influenced by the levels present in the source water. Using micro-Fourier transform infrared spectroscopy (micro-FTIR), this study investigated the occurrence levels and spatiotemporal distribution characteristics of microplastics in various source waters, including reservoirs A, B, C, and water supply plant L, in a city of East China. The results indicated that the microplastic concentrations in reservoirs A, B, C, and water supply plant L were (8.89±2.78) n/L, (6.81±2.64) n/L, (12.50±4.17) n/L, and (10.14±4.31) n/L, respectively, with higher concentrations observed in winter compared to summer. Microplastics in the reservoirs were primarily granular, predominantly composed of polyvinyl chloride (PVC) and polyethylene terephthalate (PET), while microplastics in the influent of water supply plant L were mainly fibrous, composed primarily of polystyrene (PS) and PET. In all source waters, the microplastics were predominantly white and transparent, with particles smaller than 1 000 μm making up the largest proportion. Notably, the polymer types and color diversity of microplastics in the influent of water supply plant L were more varied than those in the reservoir waters. Ecological risk assessments indicated that the source waters exhibited a higher ecological risk from microplastics during winter, with reservoir C showing the highest potential ecological risk, followed by reservoir A, water supply plant L, and reservoir B. These findings provide valuable insights into microplastic pollution and contribute to the development of management strategies for water source protection and pollution mitigation.
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