古巴淡水中的微塑料:多样性,时间变化以及对细胞外酶活性的影响
Jeny Adina Larrea Murrell1, Virginia Gálvez-Blanca2, Alice L Petre2
1Department of Microbiology and Virology. Biology Faculty. University of Havana, #455 25 Street between J and I, Vedado, Plaza de la Revolución, Havana, Cuba.
Environmental pollution (Barking, Essex : 1987)
|January 29, 2025
概括
这项研究在古巴河流中发现了微塑料,其中聚乙烯四甲酸盐是最常见的. 微塑料水平影响了沉积物酶活性,特别是影响营养循环的聚烯.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 分析化学 分析化学
背景情况:
- 人工聚合物或塑料越来越多地被认为是环境污染物.
- 微塑料对水生生物和生态系统健康构成风险.
- 关于古巴和加勒比地区淡水生态系统中微塑料污染的数据很少.
研究的目的:
- 研究两条古巴西部河流的沉积物中的微塑料的存在,多样性和时间变化.
- 描述这些淡水生态系统中发现的微塑料类型.
- 检查微塑料度,盆地微生物细胞外酶活性和沉积物营养水平之间的关系.
主要方法:
- 从两个河流站收集沉积物样本:Paila (城市) 和Baños del San Juan (农村).
- 微塑料的识别使用微里叶变换红外光谱学 (micro-FTIR) 进行.
- 用色度测量方法量化了营养水平和细胞外酶活性.
主要成果:
- 在城市的帕伊拉河中,微塑料度比农村的巴诺斯德尔圣胡安河高.
- 聚乙烯四甲酸是最丰富的微塑料类型 (41.9%),其次是聚烯 (25.8%).
- 微塑料的存在,特别是聚烯,与沉积物酶活动的改变有关 (亚酸盐,,蛋白质分解和催化酶活性).
结论:
- 这项研究提供了古巴淡水生态系统中微塑料的第一份报告,突出了城市河流作为重要的积聚区.
- 聚烯微塑料可能会抑制盆地微生物群落中关键的酶过程,影响营养循环.
- 这些发现强调了需要监测和管理战略,以解决该地区的微塑料污染问题.
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