淡水生态系统中的微塑料:概率性环境风险评估以及发生情况和生态毒理学研究中的当前知识
Leslie L Morales-Espinoza1, Renan Castelhano Gebara2, Elson Longo2
1Department of Environmental Engineering, Instituto de Ciência e Tecnologia-Câmpus de Sorocaba-Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP).
Environmental toxicology and chemistry
|January 31, 2025
概括
淡水中的微塑料 (MP) 污染非常普遍,生态毒理学研究揭示了潜在的风险. 虽然全球风险似乎很低,但局部度,特别是在马来西亚,表明显著的变化和潜在的危险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 环境化学环境化学
背景情况:
- 基于微塑料 (MP) 的实验室生态毒理学研究可能不能完全反映现实世界的环境条件.
- 了解MP的流行,生物中的积累以及淡水生态系统中相关的生态风险至关重要.
研究的目的:
- 审查全球淡水环境中MP流行和积累现有研究.
- 分析生态毒理学数据,并对国会议员进行生态风险评估.
- 估计各种MP聚合物的预测无效度 (PNEC) 值,并评估全球MP风险.
主要方法:
- 对淡水中MP流行,形态,颗粒大小和聚合物类型的研究进行系统审查.
- 编制和分析生态毒理学数据以确定危险度5% (HC5) 和PNEC值.
- 通过测量环境度和推导PNEC值计算风险系数 (RQ).
主要成果:
- 聚钢 (PS) 和聚乙烯 (PE) 的PNEC估计值分别为0.003毫克L-1和0.011毫克L-1.
- 七种MP类型的更广泛的PNEC计算为0.0027毫克L-1 (2.61颗粒L-1).
- 全球RQ为0.094表明MP风险低,但存在显著的区域差异 (例如,RQ=22.06在马来西亚,0.000008在澳大利亚).
结论:
- 本综述提供了对淡水PM污染,生态毒理学影响和风险评估的全面概述.
- 虽然目前全球PM风险较低,但局部高度需要有针对性的监测和管理策略.
- 该研究为关键的MP聚合物提供了关键的PNEC值,有助于未来的环境风险评估.
更多相关视频
05:31Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris
Published on: July 28, 2018
15.9K
06:46Accumulation and Distribution of Fluorescent Microplastics in the Early Life Stages of Zebrafish
Published on: July 4, 2021
4.6K
相关概念视频
01:30Environmental Applications of Microorganisms
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
01:24Freshwater 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...
01:30Microbial 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.
01:28Microbial 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...