相关实验视频

Updated: Jul 12, 2026

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

Published on: January 11, 2015

鱼类石中的PFAS:对墨西哥加勒比海岸线的担忧日益增加

Biraj Saha¹, Mohamed Ateia², Sujan Fernando³

¹Department of Civil, Construction and Environmental Engineering, North Dakota State University, Fargo, ND 58102, United States.

Journal of hazardous materials

|July 5, 2025

概括

在影响海岸线的藻中检测到和多基物质 (PFAS). 这些持久化学物质在海藻中积累,对其使用和处置构成挑战.

科学领域:

环境化学环境化学
海洋生物学海洋生物学
污染研究污染研究

背景情况:

自2011年以来,全球海底 Sargassum开花的加剧影响超过30个国家.
在全球范围内,石灰岩的开花带来了重大的环境和经济挑战.
在中存在的per-和多基物质 (PFAS) 的存在和影响在很大程度上仍未被调查.

研究的目的:

进行第一项关于藻中PFAS污染的调查.
分析来自墨西哥加勒比海的体中PFAS的类型和度.
了解 PFAS 在 Sargassum 中的分布和生物积累潜力.

主要方法:

在墨西哥加勒比海采集的石样本中分析了40种不同的PFAS化合物.
总PFAS度的量化和主要PFAS类别的识别 ( perfluorocarboxylic酸与 perfluorosulfonic酸).
评估PFAS在不同形态部分 (叶片,茎,膀) 的质量分布,并计算生物积累因子 (BAF).

主要成果:

检测到十个PFAS,总度为3.88±0.19 ng/g (干重).
perfluorocarboxylic 酸 (80.7%) 在 perfluorosulfonic 酸 (19.3%) 上占主导地位,长链 PFAS (57.1%) 比短链更为普遍.
PFAS质量因部分而异,脂质丰富的膀对长链PFAS有显著的贡献;Log BAF随着PFAS碳链长度的增加而增加.

结论:

气作为PFAS的载体,积累这些持久污染物.
这些发现复杂化了Sargassum的使用和处置,需要减少污染的策略.
估计每年PFAS装载量突出显示了墨西哥加勒比海和大西洋石灰带的问题规模.

关键词:

生物积累生物积累生物积累海洋污染海洋污染在PFAS的分发上.萨尔加索姆带是一个气带.海藻是一种海藻.

更多相关视频

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis

Published on: July 1, 2017

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

相关概念视频

Other Algae

Other Algae

The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...

Marine Microbial Ecology

Marine 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...