阿根廷巴伊亚布兰卡的雨水中的微塑料和人为废物
A Belén Villafañe1, Ana C Ronda1,2, Lucas S Rodríguez Pirani3
1Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina.
Heliyon
|June 29, 2023
概括
在阿根廷的雨水中检测到空气中的微塑料和人为废物. 这项研究发现,平均每平方米每天沉积77个物品,主要是纤维.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 材料科学 材料科学 材料科学
背景情况:
- 人们越来越担心大气中的微塑料 (MP) 污染.
- 了解空气中的颗粒在降水中的沉积对于评估环境影响至关重要.
研究的目的:
- 在雨水中量化空气中的人为废物,包括微塑料.
- 描述沉积颗粒的类型,大小,颜色和化学成分.
- 提供阿根廷雨中微塑料污染的首次评估.
主要方法:
- 从2021年3月到12月,每月采用一个仅使用湿式收集器进行雨水采样.
- 对收集的碎片进行丰富度,大小和形态学的分析.
- 使用拉曼显微镜对疑似微塑料进行化学表征.
主要成果:
- 所有雨水样本都含有人为废物,平均沉积量为77±29个物品m-2d-1.
- 颗粒从0.1毫米到3.87毫米不等,其中77.8%小于1毫米.
- 纤维构成了95%的碎片,主要是蓝色,浅蓝色和黑色. 拉曼显微镜证实了聚钢,PET和PVAc纤维,有些带有蓝色染料.
结论:
- 阿根廷巴伊亚布兰卡的雨水被空气中的人为废物污染,包括微塑料.
- 纤维是雨水沉积的微塑料污染的主要形式.
- 这项研究凸显了对南美大气中微塑料来源和运输机制的进一步研究的需要.
相关概念视频
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:28Microbial 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...