在被食品加工废水污染的河流和沿海食物网中生物积累和转移
Christopher J Kotalik1, Laura E Hubbard2, Brittany G Perrotta1,3
1U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri 65201, United States.
Environmental science & technology
|September 4, 2025
概括
和多基物质 (PFAS) 的生物积累在流食物网中有所不同. 化学特性和生物过程影响水生和陆生生态系统之间的PFAS转移.
科学领域:
- 环境化学
- 生态毒理学
- 食物网络的动态
背景情况:
- 和多基物质 (PFAS) 是持续性环境污染物.
- 工业设施的废水排放可能会将PFAS引入水生生态系统.
- 了解PFAS在食物网中的生物积累和转移对于风险评估至关重要.
研究的目的:
- 评估PFAS在流食物网中的生物积累和食物转移.
- 研究化学特性和生物过程对PFAS动态的影响.
- 为了比较 PFAS 暴露和水上和陆地环境之间的转移.
主要方法:
- 对非生物 (水,沉积物,泡) 和生物 (藻类,昆虫,鱼类,蜘蛛) 基质进行采样.
- 使用质谱测量量PFAS度的量化.
- 分析PFAS的形状和与化学性质的相关性 (Log K_MW,链长).
主要成果:
- 工业废物下游的PFAS度显著上升,主要是6:2托硫酸盐 (6:2FTS).
- 差异生物积累: perfluorooctanesulfonate (PFOS) 生物放大,而 6:2 FTS 在水生食物网中生物稀释.
- 对河岸蜘蛛的食物转移显示出6:2 FTS的丰富和PFOS的稀释,这表明不同的途径.
- 脂膜与水分离系数 (log K_MW), perfluoroalkyl carboxylate (PFCA) 链长度和生物积累之间的正相关性.
结论:
- PFAS的生物积累和转移是由化学特性和生物过程的组合控制的.
- 水生生态系统和陆生生态系统之间的PFAS暴露和食用转移存在显著差异.
- 化学参数如链条长度和日志KMW可以预测现场环境中的PFAS生物积累潜力.
更多相关视频
09:04Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow
Published on: April 18, 2019
12.6K
07:06Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique
Published on: September 28, 2022
1.7K
相关概念视频
Primary Production
20.4K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
20.4K
What are Biogeochemical Cycles?
31.0K
The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.
31.0K
Bioremediation
17.4K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
17.4K
Environmental Applications of Microorganisms
1.5K
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...
1.5K
Freshwater Microbial Ecology
58
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...
58
Reservoir of Infection
89
Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...
89
