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评估巴西废物回收环境中的空气传播颗粒和生物气溶胶浓度。

Assessment of airborne particles and bioaerosols concentrations in a waste recycling environment in Brazil.

机构信息

Federal University of Technology-Parana, 3131 Pioneiros Avenue, Londrina, PR, 86036-370, Brazil.

Brandon University, 270 18th Street, Brandon, MB, R7A 6A9, Canada.

出版信息

Sci Rep. 2020 Sep 9;10(1):14812. doi: 10.1038/s41598-020-71787-0.

DOI:10.1038/s41598-020-71787-0
PMID:32908228
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7481203/
Abstract

This study aims to assess the concentrations of size-fractioned particle mass (PM, PM, PM, PM) and number (PNC, PNC, PNC, PNC), bacteria, and fungi in a Materials Recycling Facility (MRF) in Brazil. The measurements were performed inside the waste processing shed (P1) and in the outdoor environment (P2) during working days in winter and spring of 2017, and summer of 2019. A total of 2,400 min of PM, 1,440 min of PNC, and 216 samples of bioaerosols were collected in the morning and afternoon. P1 has the strongest air contamination with mean values of 475.5 ± 563.7 µg m for PM, 58.6 ± 36.0 cm for PNC, 1,088.8 ± 825.2 colony-forming units per cubic meter (CFU m) for bacteria, and 2,738.3 ± 1,381.3 CFU m for fungi. The indoor/outdoor ratios indicated the large influence of indoor sources due to the activities performed inside P1 that promote the generation and resuspension of pollutants. Gram-positive bacteria dominated with 58.6% of indoor samples. Overall, our results show a critical indoor air quality situation in a Brazilian MRF, which may cause several health risks for waste pickers. Finally, we call attention to the lack of occupational exposure limits for bioaerosols in industrial workplaces and mainly in MRFs.

摘要

本研究旨在评估巴西某材料回收设施(MRF)中不同粒径颗粒物质量(PM、PM、PM、PM)和数量(PNC、PNC、PNC、PNC)、细菌和真菌的浓度。这些测量是在 2017 年冬季和春季以及 2019 年夏季的工作日,在废物处理棚(P1)内部和室外环境(P2)进行的。共采集了 2400 分钟的 PM、1440 分钟的 PNC 和 216 个生物气溶胶样本,分别在上午和下午进行。P1 处的空气污染最强,PM 的平均值为 475.5 ± 563.7 µg m,PNC 的平均值为 58.6 ± 36.0 cm,细菌的 CFU m 平均值为 1088.8 ± 825.2,真菌的 CFU m 平均值为 2738.3 ± 1381.3。室内/室外比值表明,由于 P1 内部活动会促进污染物的产生和再悬浮,因此室内污染源的影响较大。室内样本中以革兰氏阳性菌为主,占 58.6%。总体而言,我们的研究结果表明巴西 MRF 室内空气质量较差,可能会对拾荒者造成多种健康风险。最后,我们注意到工业场所,尤其是 MRF 中缺乏生物气溶胶的职业暴露限值。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/8f6b2110e35e/41598_2020_71787_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/332a303a276f/41598_2020_71787_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/70115ad002bb/41598_2020_71787_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/477f285e1de1/41598_2020_71787_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/8f6b2110e35e/41598_2020_71787_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/332a303a276f/41598_2020_71787_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/70115ad002bb/41598_2020_71787_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/477f285e1de1/41598_2020_71787_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/019c/7481203/8f6b2110e35e/41598_2020_71787_Fig4_HTML.jpg

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