Distribution Characteristics of Atmospheric Microplastics in Typical Desert Agricultural Regions

IF 3.6 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Environmental Toxicology and Chemistry Pub Date : 2024-07-09 DOI:10.1002/etc.5951

Ao Du, Yachuan Zhao, Can Hu, Xufeng Wang, Hui Cheng, Wenhao Xia, Long Wang, Jianfei Xing

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Abstract

We examined the distribution characteristics of atmospheric microplastics in typical desert agricultural regions, with a focus on the agricultural areas surrounding the Taklamakan Desert, Xinjiang, China. We collected samples of total suspended particulate matter (TSP), atmospheric deposition, and atmospheric dust using both active and passive collection methods. The chemical composition, particle size, shape, and color of atmospheric microplastics were examined using a stereomicroscope and a Fourier-transform infrared spectrometer to analyze their characteristics. The results showed that the primary chemical compositions of microplastics included polypropylene (PP), polyethylene, polyethylene terephthalate, polymethylmethacrylate, and cellophane. Particle sizes were mainly within the range of 0 to 1000 μm. Fibrous microplastics constituted the majority of the TSP and atmospheric deposition, whereas film-like microplastics constituted the largest proportion of atmospheric dustfall. The deposition flux of atmospheric microplastics in the first quarter was measured at 103.21 ± 22.12 particles/m²/day, which was lower than that observed in conventional agricultural areas. The abundance of microplastics in atmospheric dustfall was found to be 1.36 particles/g. The proportion of PP microplastics in atmospheric dustfall can be as high as 35%. Through a comparison of microplastic content in TSP during dust storms and under normal weather conditions, it was found that dust storms can lead to an increase in the abundance of microplastics within the atmospheric TSP. The present study provides a scientific basis for understanding the distribution of atmospheric microplastics in typical desert agricultural regions. Environ Toxicol Chem 2024;43:1982–1995. © 2024 SETAC.

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典型沙漠农业区大气微塑料的分布特征。

我们研究了典型沙漠农业区大气微塑料的分布特征，重点是中国新疆塔克拉玛干沙漠周边的农业区。我们采用主动和被动两种采集方法收集了总悬浮颗粒物（TSP）、大气沉降物和大气尘埃样本。使用体视显微镜和傅立叶变换红外光谱仪对大气中微塑料的化学成分、粒径、形状和颜色进行了分析。结果表明，微塑料的主要化学成分包括聚丙烯（PP）、聚乙烯、聚对苯二甲酸乙二酯、聚甲基丙烯酸甲酯和玻璃纸。颗粒大小主要在 0 到 1000 微米之间。纤维状微塑料占总悬浮物和大气沉积物的绝大部分，而薄膜状微塑料在大气降尘中所占比例最大。第一季度测得的大气微塑料沉降通量为 103.21 ± 22.12 粒子/平方米/天，低于在常规农业区观测到的沉降通量。大气降尘中的微塑料丰度为 1.36 粒子/克。大气降尘中 PP 微塑料的比例可高达 35%。通过比较沙尘暴期间和正常天气条件下降尘中的微塑料含量，发现沙尘暴会导致大气降尘中的微塑料含量增加。本研究为了解典型沙漠农业区大气中微塑料的分布情况提供了科学依据。环境毒物化学 2024;00:1-14。© 2024 SETAC.

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来源期刊

Environmental Toxicology and Chemistry 环境科学-毒理学

CiteScore

7.40

自引率

9.80%

发文量

265

审稿时长

3.4 months

期刊介绍： The Society of Environmental Toxicology and Chemistry (SETAC) publishes two journals: Environmental Toxicology and Chemistry (ET&C) and Integrated Environmental Assessment and Management (IEAM). Environmental Toxicology and Chemistry is dedicated to furthering scientific knowledge and disseminating information on environmental toxicology and chemistry, including the application of these sciences to risk assessment.[...] Environmental Toxicology and Chemistry is interdisciplinary in scope and integrates the fields of environmental toxicology; environmental, analytical, and molecular chemistry; ecology; physiology; biochemistry; microbiology; genetics; genomics; environmental engineering; chemical, environmental, and biological modeling; epidemiology; and earth sciences. ET&C seeks to publish papers describing original experimental or theoretical work that significantly advances understanding in the area of environmental toxicology, environmental chemistry and hazard/risk assessment. Emphasis is given to papers that enhance capabilities for the prediction, measurement, and assessment of the fate and effects of chemicals in the environment, rather than simply providing additional data. The scientific impact of papers is judged in terms of the breadth and depth of the findings and the expected influence on existing or future scientific practice. Methodological papers must make clear not only how the work differs from existing practice, but the significance of these differences to the field. Site-based research or monitoring must have regional or global implications beyond the particular site, such as evaluating processes, mechanisms, or theory under a natural environmental setting.

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