微塑料在河流流域的季节性脉冲效应-从支流流域到主流流域
Feiyang Xia1, Yelin Wang1, Dunqiu Wang2
1Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watershed, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, 510006, China.
Journal of environmental management
|June 8, 2023
概括
河流是微塑料 (<5000微米) 进入海洋的关键通道. 这项研究揭示了中国微塑料的季节性变化和运输情况.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 生态毒理学 生态毒理学
背景情况:
- 河流是从陆地来源到海洋环境的微塑料污染的重要道.
- 了解河流系统中的微塑料运输动态对于减轻海洋污染至关重要.
- 河流流和流程的季节性变化影响了微塑料的命运和运输.
研究的目的:
- 调查风河流域微塑料污染的季节性变化.
- 探索微塑料在河流系统中的迁移和保留过程.
- 量化微塑料流量,确定流域内的来源和沉积点.
主要方法:
- 采用基于光的协议来量化微塑料的数量和特征.
- 在梁河流域进行了季节性地表水采样.
- 计算了不同河流段的微塑料流量,以评估运输和保留.
主要成果:
- 微塑料的丰度范围从 (6.20 ± 0.57) 到 (41.93 ± 8.13) 个/L,其中小尺寸的微塑料 (<330μm) 主导 (57.89-95.12%).
- 微塑料流量差异很大,李河上游流量最高 (1.54 ± 0.55 × 10^14个项目/年).
- 河流流程保留了61.68%的微塑料,特别是在雨季 (91.87%的保留),同时将77.42%的排放出口到主流.
结论:
- 这项研究提供了首次基于流量分析的河流流域中小型微塑料的运输.
- 河流流动过程在保留微塑料方面发挥着至关重要的作用,这可能解释了海洋中"缺失的小型微塑料部分".
- 这些发现有助于更好地了解河流系统中的微塑料动态,并为污染模型提供信息.
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