从降水和底层表面类型的角度来看,减轻空气中的微塑料污染
Xiaohua Huang1, Yu Chen1, Yuchuan Meng1
1State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China.
Water research
|July 27, 2023
概括
空气中的微塑料 (AMP) 污染越来越令人担忧. 这项研究发现,虽然树木拦截了一些AMP,但降雨提供了更显著,更长时间的清理效应,突出了需要污染控制的敏感城市地区.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 污染研究 污染研究
背景情况:
- 空气中的微塑料 (AMP) 构成一个重大的环境挑战,其缓解策略有限.
- 了解AMP的来源,运输和沉积对于制定有效的控制措施至关重要.
研究的目的:
- 为了调查中国成都空气中的微塑料 (AMP) 的污染状况.
- 分析气象因素和底层表面类型对AMP污染的影响.
- 评估城市植被和降雨降低AMP污染的潜力.
主要方法:
- 从开放的空间和Ficus virens树下收集了AMP.
- 分析了气象数据和潜在的表面类型,以了解它们对AMP的影响.
- 树木的拦截率和降雨的清理效率被量化.
主要成果:
- 有纤维的AMP,主要是聚乙烯-聚乙烯 (PP-PE) 和聚乙烯 (PP),主导了污染.
- 平均AMP的沉积流量为192n/m2/d (22.41μg/m2/d). 这是一个很大的问题.
- 降雨显示AMP的长时间清理效率 (降雨后8-48小时).
- 菲库斯·维伦斯树显示AMP的拦截率低 (6.25%),保留了较小的纤维.
- 据估计,每年AMP进入成都河流的负载量为1149公斤,城市地区的负载更高.
- 植被拦截平衡了河流负荷,开放/稀疏建筑被确定为AMP热点.
结论:
- 降雨是一个关键的气象因素,具有显著的,持久的AMP清理效应.
- 城市树木对AMP的拦截有限,主要捕获较小的纤维颗粒.
- 开放和建筑稀疏的地区容易受到AMP积累的影响,需要有针对性的污染控制策略.
- 综合分析显示,急需采取措施缓解AMP,特别是在敏感的城市环境中.
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