| 摘要: |
| 为探究微塑料在浅水型湖泊表层水体中的时空分布特征及其影响因素,以湖北保安湖为例,分别于2021年4月、7月、10月和2022年1月,对保安湖表层水体进行采样分析并探究其时空分布特征。结果表明,湖泊表层水微塑料的年平均丰度为(16.20±2.23) items.L-1。微塑料丰度呈现明显的季节差异性,夏季(采样时间7月)湖区丰度均值降至最低为(1.40±0.09)items.L-1。粒径在0~1mm及黑色和无色微塑料占主导地位,分别占比82.57%、36.16%和21.31%；分布最广泛的微塑料形态为纤维(40.01%)。聚乙烯(Polyethylene, PE)和低密度聚乙烯(Low Density-Polyethylene, LDPE)是最主要的微塑料类型,占比46.05%为主要贡献者,其次为聚苯乙烯(Polystyrene, PS, 17.2%)、聚对苯二甲酸乙二醇酯(Polyethylene terephthalate, PET, 8.33%)和聚乙酸乙酯(Polyvinyl Acetate, PVAC, 8.31%)。经过统计分析,微塑料的丰度数据与水质指标(CODMn、水深、Tem、DO、pH、Tur、SD、TN、TP)之间并无显著的相关关系。该研究评估了长江中下游典型浅水湖泊微塑料分布现状,为评估微塑料潜在风险提供了科学依据。 |
| 关键词: 浅水湖泊 微塑料 时空分布 影响因素 |
| DOI： |
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| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| Spatial and temporal distribution characteristics of microplastics in the surface water of typical shallow lakes |
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WANG Hao, WANG Weimu, LIU Hui, CAO Jia, ZHANG Xiaojin, CHEN Jiaxin, QI Zhangrong, JIAO Xuchao, ZHU Jiaojiao
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College of Agricultural Science and Engineering,Hohai University
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| Abstract: |
| To investigate the spatial and temporal distribution of microplastics in the surface water of shallow lakes and its influencing factors, the surface water of Lake Baoan was sampled and analyzed in April, July, October and January of 2021 and 2022, respectively. The results showed that the annual average abundance of microplastics in the surface water of the lake was (16.20±2.23) items.L-1. The abundance of microplastics showed obvious seasonal variability, and the average abundance in the lake area dropped to the lowest value of (1.40±0.09) items.L-1 in summer (July, the sampling time), 36.16% and 21.31%, respectively; the most widely distributed microplastic form was fiber (40.01%). Polyethylene (PE) and low density-polyethylene (LDPE) were the most dominant microplastic types, accounting for 46.05% of the total, followed by polystyrene (PS, 17.2%), polyethylene terephthalate (PET), and polystyrene (PS, 17.2%). Polyethylene terephthalate (PET, 8.33%) and Polyvinyl Acetate (PVAC, 8.31%) were the main contributors. After statistical analysis, there was no significant correlation between the microplastic abundance data and water quality indicators (CODMn, water depth, Tem, DO, pH, Tur, SD, TN, TP). This study assessed the current status of microplastic distribution in typical shallow lakes in the middle and lower reaches of the Yangtze River and provided a scientific basis for assessing the potential risk of microplastics. |
| Key words: Shallow lakes Microplastics Spatial and temporal distribution Influencing factors |
