历史建筑外观上的微塑料污染:隐藏的'沉'还是城市威胁?
Katrin Wilhelm1, Sam Woor2, Michelle Jackson3
1Oxford Resilient Buildings and Landscapes Laboratory (OxRBL), School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK.
Environmental pollution (Barking, Essex : 1987)
|December 14, 2023
概括
微塑料 (MP) 在城市建筑立面上普遍存在,其密度达到975,000纤维/m^2. 这项研究突出展示了国会议员在历史建筑的外观,揭示了基于暴露和高度的多样化分布,这对于了解城市污染至关重要.
科学领域:
- 环境科学 环境科学
- 城市生态城市生态学
- 材料科学 材料科学 材料科学
背景情况:
- 微塑料 (MP) 污染研究忽视了城市的外观,在了解城市MP污染方面造成了知识差距.
- 城市立面是日常环境中不可或缺的组成部分,但它们在微塑料积累中的作用在很大程度上仍未得到研究.
研究的目的:
- 量化和识别英国中型城市历史城市外观上的微塑料.
- 根据立面暴露,高度和环境变量来研究微塑料纤维的分布模式.
主要方法:
- 在历史建筑立面上的微塑料纤维的量化和识别.
- 分析光纤长度频率和分布在不同的暴露场景 (例如,庇护,不太庇护,低区域) 中.
- 纤维存在与环境因素的相关性,如高度和接近诸如沟之类的特征.
主要成果:
- 估计平均微塑料纤维密度为975,000纤维/平方米,自然纤维与人工纤维的比例为 1:5.
- 确定了三种不同的纤维长度频率组,根据暴露情况而有所不同:庇护区域 (4m) 显示较短纤维 (60-240μm) 的高流行率,而较低区域 (1.5-2m) 有较长纤维 (300-1000μm).
- 环境因素显著影响了纤维分布;例如,一个有缺陷的沟区域显示没有纤维.
结论:
- 历史悠久的城市立面是微塑料纤维的重要储存库,其分布模式受微环境条件的影响.
- 进一步的研究是必要的,以确定这些纤维的长期命运,以及立面是否减轻或放大健康风险.
- 调查结果强调,需要对城市PM污染进行评估,并为公共卫生和可持续城市制定减缓策略.
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