探测Xanthoria parietina体内积累的大气微塑料:伊斯坦布尔亚洲区地衣生物监测研究

IF 2.6 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Gülşah Çobanoğlu, Ezgi Özen
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引用次数: 0

摘要

如今,空气中的微塑料已成为对所有生物体的无形全球威胁。这项研究旨在首次通过地衣这种空气污染生物监测器来监测伊斯坦布尔市(土耳其)的大气微塑料污染。研究人员从伊斯坦布尔亚洲一侧 8 个不同地区的森林地带采集了附生叶状地衣 Xanthoria parietina 的样本,并通过化学特性分析和显微镜检查寻找微塑料的线索。利用聚合物鉴定中使用的傅立叶变换红外技术,在各地采集的城市地衣样本中鉴定出了 12 种化合物(醛、烯、胺、羧酸、醚、碳氢化合物、氢氧化物、酮、甲基、亚甲基、二氧化氮和二氧化硫)作为微塑料成分。地衣样本中积累最多的化合物是胺,它是塑料化学降解的结果。此外,还检测到醛类、羧酸和亚甲基等微塑料颗粒(MPs)的组成成分,以及二氧化硫和二氧化氮等空气污染物。通过对地衣苔藓采用荧光染色法进行显微观察,也可目测到 MPs。从 Üsküdar 区旅游区采集的样本中检测到的地衣苔藓中 MPs 数量最多。根据研究结果,除了人为影响外,在伊斯坦布尔亚洲一侧的地衣监测中发现的高浓度大气微塑料化合物表明,这些污染物可能来自当地的塑料废物或工业区。这项研究表明,可以通过地衣对空气中的有机污染物(如微塑料)进行生物监测研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Detection of Atmospheric Microplastics Accumulated in Xanthoria parietina: A Lichen Biomonitoring Study on the Asian Side of Istanbul

Detection of Atmospheric Microplastics Accumulated in Xanthoria parietina: A Lichen Biomonitoring Study on the Asian Side of Istanbul

Airborne microplastics have become invisible global threats to all living organisms today. This study was designed for the first time to monitor atmospheric microplastic pollution in the city of Istanbul (Turkiye) through lichens, known as air pollution biomonitors. Epiphytic foliose lichen Xanthoria parietina was sampled from forested areas in 8 different districts on the Asian side of megacity, and searched for clues of microplastics through chemical characterization and microscopic examination. Twelve compounds (aldehyde, alkene, amine, carboxylic acid, ether, hydrocarbon, hydroxide, ketone, methyl, methylene, nitrogen dioxide, and sulfur dioxide) were identified as microplastic components in urban lichen samples taken from all localities with the FT-IR technique used in polymer identification. The most accumulated compound in lichen samples was amine, which is formed as a result of the chemical degradation of plastics. Building blocks of microplastic particles (MPs) such as aldehydes, carboxylic acid and methylene, as well as air pollutants such as SO2 and NO2 were also detected. Analysis data were supported by microscopic observations made by applying fluorescent staining method to lichen thalli and MPs were also detected visually. The highest number of MPs seen in the lichen thalli was detected in samples taken from touristic areas in Üsküdar district. Based on the results, in addition to human impact, intense atmospheric microplastic compounds identified by lichen monitoring on the Asian side of Istanbul suggest that these pollutants may have been transported from local plastic waste or industrial areas. This study shows that biomonitoring studies of airborne organic pollutants such as microplastics can be done through lichens.

Graphical Abstract

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来源期刊
CiteScore
5.40
自引率
0.00%
发文量
104
审稿时长
1.7 months
期刊介绍: International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.
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