自20世纪90年代以来,加速了从城市化沿海湖 (西北墨西哥) 中的Pb日期的沉积物核心中的微塑料污染
Ana Carolina Ruiz-Fernández1, Libia Hascibe Pérez-Bernal1, Joan-Albert Sanchez-Cabeza1
1Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Sinaloa, Mexico.
The Science of the total environment
|August 21, 2024
概括
自20世纪中叶以来,埃斯特罗·德·乌里亚斯湖的微塑料污染速度加速,纤维是最常见的类型. 这种塑料污染威胁到当地渔业和生计.
科学领域:
- 环境科学 环境科学
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 是普遍存在的环境污染物.
- 沉积物充当了微塑料的沉降池,记录了历史污染.
- 乌里亚斯湖 (Estero de Urías Lagoon,简称EUL) 是一个面临污染压力的城市化沿海生态系统.
研究的目的:
- 为了重建在EUL沉积物中微塑料的历史积累.
- 分析过去一个世纪微塑料丰富和流动的时间趋势.
- 为了确定湖中的聚合物类型和微塑料污染源.
主要方法:
- 分析了3个210Pb日期的沉积物核心.
- 通过密度分离 (和NaCl溶液) 提取微塑料.
- 使用立体显微镜和尼罗河红色染色进行量化;使用福里埃变换红外光谱测量进行聚合物识别.
主要成果:
- 在1950年之前,微塑料并不存在,自20世纪中叶以来,其积累速度加速.
- 纤维 (66-89%) 在碎片 (11-34%) 上占主导地位.
- 聚乙烯二甲 (PET) 是最常见的聚合物;半合成纤维素纤维也很普遍.
结论:
- 由于人口增长和塑料消费,EUL的微塑料污染显著增加.
- 湖的水力动力学影响了微塑料的分布.
- 这些发现强调了改善废物管理的迫切需要,以保护水生生态系统和依赖人类人口.
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