雨水排水微塑料:聚合物类型,颗粒大小,以及控制负载率的因素
Lilia Ochoa1, Julianne Chan1, Caitlyn Auguste2
1Department of Civil & Environmental Engineering, Rutgers, The State University of New Jersey, United States of America.
The Science of the total environment
|April 18, 2024
概括
暴风雨水的排放将微塑料 (MP) 带入水生环境. 这项研究分析了城市风暴期间的MP大小,组成和负载,发现MP负载和降雨之间的中等相关性,为风险评估提供了信息.
科学领域:
- 环境科学 环境科学
- 水生生态学 水生生态学
- 聚合物科学 聚合物科学
背景情况:
- 微塑料 (MP) 是5毫米以下的塑料颗粒,对水生生态系统构成威胁.
- 风暴水流失是MP进入水道的重要途径.
- 了解流水中的MP特性对于环境风险评估至关重要.
研究的目的:
- 为了确定城市雨水中微塑料的尺寸,形态,化学成分和负载.
- 调查MP特征和风暴事件参数之间的关系.
- 为了确定微塑料量化中的潜在错误来源.
主要方法:
- 风暴水样本从风暴事件期间的城市排泄物中收集.
- 使用湿过氧化氧化和纤维素消化提取微塑料.
- 粒子分析使用减弱总反射率 (ATR) 里埃变换红外光谱法 (FTIR) 进行.
主要成果:
- 微塑料度在0.41到0.99MP/L之间,颗粒在500-5000微米之间.
- 确定了17种不同的聚合物类型.
- MP负载与降雨积累和强度 (Kendall τ = 分别为0.54和0.42) 有中等的相关性.
- 基于FTIR显微镜与分析的尺寸分类中发现了差异.
结论:
- 暴风雨水的排放对水生生态系统的微塑料有很大的贡献.
- MP负载受降雨模式的影响,尽管第一次冲洗并没有始终被观察到.
- 对微塑料进行准确的表征对于有效的环境管理和减缓战略至关重要.
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