微塑料的组成和度,包括雨水保留池沉积物中的轮胎磨损颗粒
Lisa Öborn1, Heléne Österlund2, Claudia Lorenz3
1Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-971 87 Luleå, Sweden; Environment and Health Administration, City of Stockholm, Fleminggatan 4, Box 8136, Stockholm SE-104 20, Sweden.
概括
雨水处理设施捕获微塑料 (MPs),包括轮胎磨损颗粒 (TWPs),但度的差异很大. 在设施的入口处,MP,主要是聚烯和TWPs的含量比出口处高.
科学领域:
- 环境科学 环境科学
- 水质管理水质管理
- 污染控制 污染控制
背景情况:
- 雨水排放是微塑料 (MP) 和轮胎磨损颗粒 (TWP) 进入水生生态系统的重要途径.
- 陆地来源为城市雨水系统提供大量的MP和TWP.
- 为了有效地管理这些污染物,需要了解它们在雨水处理过程中的命运.
研究的目的:
- 调查雨水处理设施沉积物中MPs的存在,度,大小和聚合物类型.
- 评估这些设施内的MP和TWP从入口到出口的分配和移除效率.
- 确定主导的MP类型和影响其定居行为因素.
主要方法:
- 从六个雨水处理设施 (五个保留池,一个地下沉积池) 收集了沉积物样本.
- 微塑料分析利用微里叶变换红外光谱学 (μFTIR) 来量化和识别聚合物.
- 轮胎磨损颗粒分析采用了热解气体染色学质谱法 (Py-GC-MS).
主要成果:
- 微粒度差异很大 (1,44072,209个物品/千克;1202,950微克/千克) 和TWP度范围高达69,300微克/千克.
- 与出口相比,在设施的入口处观察到明显更高的MP和TWP度.
- 聚烯 (PP) 是最多的MP类型,而TWPs在大多数样本中以质量占主导地位. 大约70%的检测到的颗粒是100微米或更小.
结论:
- 雨水处理设施有效地减少了MP和TWP负载,其证据是出口处的度较低.
- 小颗粒 (<100微米) 的流行以及PP数量占主导地位表明,复杂的沉积动态超出了简单密度.
- 了解雨水系统中的MP和TWP行为对于减轻水污染至关重要.
相关概念视频
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...


