微塑料在中国北方内陆河流域的发生,潜在来源和生态风险评估
Mufan Gan1, Yan Zhang1, Peng Shi2
1Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
Marine pollution bulletin
|July 1, 2024
概括
微塑料污染在城市河流沉积物中很高,较小的颗粒最常见. 沉积物充当这些微塑料 (MP) 的沉降池,构成潜在的生态风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 河流生态系统 河流生态系统
背景情况:
- 微塑料 (MP) 是普遍存在的环境污染物,但它们在城市河流中的存在和影响尚未得到充分研究.
- 关于MPs在城市河流环境中的分布,来源和生态风险的研究有限.
研究的目的:
- 为了研究在典型的城市河流中微塑料的丰富性和特性.
- 评估MPs在河水和沉积物中的分布,来源和潜在的生态风险.
主要方法:
- 在地表水和沉积物样本中的量化MP丰度.
- 分析了MP特性,包括粒子大小,形状和聚合物类型.
- 评估了MP的分布,并确定了城市河流系统中的潜在来源.
主要成果:
- 沉积物含有MP度 (2202840项·kg-1DW) 比表面水 (2.910.3项·L-1) 高得多,这证实了沉积物作为主要沉积点.
- 小MP (<0.5毫米) 在水和沉积物样本中占主导地位.
- 纤维和碎片是最常见的MP形状,在水中主要是白色的,在沉积物中是透明的. 聚烯 (PP) 和聚乙烯 (PE) 是主要的聚合物.
结论:
- 城市河流沉积物充当了微塑料,特别是较小颗粒的重要沉积点.
- 这个城市河流中的MPs的特点和聚合物组成表明了特定的污染源.
- 需要进一步的研究,才能充分了解MP在城市河流生态系统中的积累所带来的生态风险.
相关概念视频
Environmental 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...
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...


