<br>印度贾坎德邦兰契室外和室内空气中微塑料的特征：来自该地区的初步见解,Environmental Pollution

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印度贾坎德邦兰契室外和室内空气中微塑料的特征：来自该地区的初步见解
Environmental Pollution ( IF 7.6 ) Pub Date : 2024-02-15 , DOI: 10.1016/j.envpol.2024.123543
Shreya Nandi ₁ , Radhakrishnan Naresh Kumar ₁ , Abisheg Dhandapani ₁ , Jawed Iqbal ₁

Affiliation

该研究的重点是在季风后（2022 年）和冬季（2023 年）印度贾坎德邦兰契的室外和室内空气中检测和表征微塑料。立体显微镜分析表明，塑料纤维占主导地位，碎片较少，而室内和室外空气中检测到的薄膜较少。在季风后的几个月里，室外微塑料的大气沉积量为 465 ± 27 个颗粒物/立方米/天，石英和 PTFE 的 PM 颗粒物为 12104 ± 665 和 13833 ± 1152 个颗粒物/立方米/天。在冬季，PM 样品中的微塑料沉积速率为 689 ± 52 颗粒/平方米/天，石英和 PTFE 颗粒的微塑料沉积速率分别为 19789 ± 2957 和 30087 ± 13402 颗粒/平方米/天。季风后室内环境平均沉降率为8.3×10颗粒/平方米/天，冬季为1.03×10颗粒/平方米/天。季风后PM中存在7.7~40μm的纤维和2.3~8.6μm的碎片。季风后季节，室内大气中分别存在微塑料、直径为 1.2 至 47 μm 的纤维和 0.9 至 16 μm 的碎片。冬季观察到的纤维和碎片尺寸分别为 3.6-6.9 μm 和 2.3-34 μm。室内空气薄膜的测量范围为 4.1–9.6 μm。傅里叶变换红外分析表明，室外空气中含有聚乙烯、聚丙烯、聚苯乙烯，而室内空气中含有聚氯乙烯。聚乙烯主要存在于室外空气中，聚丙烯和聚苯乙烯含量较少，室内空气中以聚氯乙烯和聚乙烯为主。室外和室内空气样本的元素图显示微塑料上存在元素。 HYSPLIT 模型表明，季风后季节颗粒物主要来自西北地区。主成分分析表明风速和风向影响微塑料的丰度。微塑料浓度显示出强烈的季节性影响，并且有可能成为污染物的储存库。

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Characterization of microplastics in outdoor and indoor air in Ranchi, Jharkhand, India: First insights from the region

The study focused on detecting and characterizing microplastics in outdoor and indoor air in Ranchi, Jharkhand, India during post-monsoon (2022) and winter (2023). Stereo microscopic analysis showed that plastic fibres had a dominant presence, fragments were less abundant, whereas fewer films could be detected in indoor and outdoor air. The atmospheric deposition of microplastics outdoors observed 465 ± 27 particles/m/day in PM and 12104 ± 665 and 13833 ± 1152 particles/m/day in PM in quartz and PTFE, respectively during the post-monsoon months. During winter, microplastic deposition rates in PM samples were found to be 689 ± 52 particles/m/day and 19789 ± 2957 and 30087 ± 13402 in quartz and PTFE particles/m/day respectively in PM. The mean deposition rate in indoor environment during post-monsoon was 8.3 × 10 and 1.03 × 10 particles/m/day in winter. During the post-monsoon period in PM, there were fibres from 7.7 to 40 μm and fragments from 2.3 μm to 8.6 μm. Indoor atmospheric microplastics, fibres ranged from 1.2 to 47 μm and fragments from 0.9 to 16 μm present respectively during the post-monsoon season. Fibres and fragment sizes witnessed during winter were 3.6–6.9 μm and 2.3–34 μm, respectively. Indoor air films measured in the range of 4.1–9.6 μm. Fourier transform infrared analysis showed that outdoor air contained polyethylene, polypropylene, Polystyrene, whereas indoor air had polyvinyl chloride. Polyethylene mainly was present in outdoor air, with lesser polypropylene and polystyrene than indoors, where polyvinyl chloride and polyethylene were in dominant proportions. Elemental mapping of outdoor and indoor air samples showed the presence of elements on the microplastics. The HYSPLIT models suggest that the particles predominantly were coming from North-West during the post-monsoon season. Principal component analysis indicated wind speed and direction influencing the abundance of microplastics. Microplastics concentration showed strong seasonal influence and potential to act as reservoir of contaminants.

更新日期：2024-02-15

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