不同的土地利用流域对拘留盆地沉积物中微塑料污染的贡献
Zoé Iannuzzi1, Brice Mourier2, Thierry Winiarski2
1Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69518, Vaulx-en-Velin, France; INSA Lyon, DEEP, EA 7429, 69621, Villeurbanne, France.
Environmental pollution (Barking, Essex : 1987)
|March 28, 2024
概括
微塑料 (MP) 污染在城市雨水沉积物中很高,特别是在工业区. 识别雨水中的MP来源对于了解和减轻城市淡水污染至关重要.
科学领域:
- 环境科学 环境科学
- 评估水质水质的评估.
- 城市水文学 城市水文学
背景情况:
- 微塑料 (MP) 污染在淡水系统中越来越令人担忧,特别是来自城市潮湿天气排放的污染.
- 了解MP的来源和特征对于有效的管理策略至关重要.
- 雨水管理基础设施,如拘留盆地,可以积累国会议员,提供对城市污染的见解.
研究的目的:
- 调查土地利用与城市拘留盆地沉积物中的微塑料污染之间的关系.
- 量化里昂大都市区雨水出水口的沉积物中的MP数量和特征.
- 确定城市参数与沉积物中的MP度之间的潜在联系.
主要方法:
- 从十个保留盆地和一个综合下水道溢出 (CSO) 结构中取沉积物样本.
- 使用密度分离和有机物降解进行MP提取.
- 通过微里埃红外光谱学和siMPle软件对MPs (50-500μm) 的表征.
主要成果:
- 在沉积物中发现的高MP丰度 (2,5251,218,82MPkg-1干重),中位数为115μm.
- 确定的主要MP类型是聚烯,聚乙烯,聚烯和聚乙烯二甲.
- 与农业或异质区相比,PM度在占主导地位的工业和商业用地水区显著更高.
结论:
- 土地利用是影响城市雨水沉积物的微塑料污染水平的一个重要因素.
- 拘留盆地作为MP污染的有价值的指标,源自城市流域.
- 建议对雨水沉积物进行进一步的研究,以确定PM污染源,并告知缓解努力.
相关概念视频
Conservation of Mass in Moving, Nondeforming Control Volume
Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Freshwater Microbial Ecology
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


