Release of inhalable particles and viable microbes to the air during packaging peeling: emission profiles and mechanisms

2021 ◽  
pp. 117338
Author(s):  
Ruining Han ◽  
Chenglin Yu ◽  
Xuening Tang ◽  
Song Yu ◽  
Min Song ◽  
...  
Keyword(s):  
ACS Omega ◽  
2020 ◽  
Vol 5 (40) ◽  
pp. 25906-25912
Author(s):  
Runhao Li ◽  
Chengbo Li ◽  
Jinyin Zhuang ◽  
Hongtang Zhu ◽  
Long Fang ◽  
...  

2018 ◽  
Vol 194 ◽  
pp. 435-443 ◽  
Author(s):  
Guoxin Yan ◽  
Jiakai Liu ◽  
Lijuan Zhu ◽  
Jiexiu Zhai ◽  
Ling Cong ◽  
...  

2021 ◽  
Vol 31 (Supplement_2) ◽  
Author(s):  
Ana Ferreira ◽  
António Loureiro ◽  
Silvia Seco ◽  
João Paulo Figueiredo ◽  
Susana Paixão ◽  
...  

Abstract Background In auto paint workshops there are several chemical, physical and biological agents that are harmful to health, making it essential to guarantee the well-being and safety of workers. In this sense, the assessment of the Indoor Air Quality (IAQ) of these places, in an associated context of occupational health, proves to be important. Methods The present study had as main objective to evaluate the occupational exposure of workers in an automobile painting workshop to particles and air pollutants. The data collection consisted of the evaluation of air quality, using for this purpose, the assessment of atmospheric pollutants carbon monoxide (CO), carbon dioxide (CO2), Volatile Organic Compounds (VOC), formaldehyde (CH2O), carbon dioxide sulfur (SO2), nitrogen dioxide (NO2), hydrogen sulfide (H2S) and particulate matter (PM2.5, PM10, breathable and inhalable particles) and the meteorological variables temperature and relative humidity. The collected data was processed using the statistical software IBM SPSS version 27.0. The interpretation of the statistical tests was performed with a 95% confidence level for a maximum random error up to 5%. Results We found that the concentrations of inhalable particles recorded in some workstations exceeded the legally established exposure limit value. Conclusions IAQ should be a priority concern for the government and for all professionals working in the area of Occupational Health and Safety having in mind the implementation of measures that promote the continuous improvement of the IAQ of the facilities, thus guaranteeing a good assessment and monitoring of workstations, preventing atmospheric pollutants from reaching concentrations that could put workers' health at risk.


Author(s):  
Dong ◽  
Ma ◽  
Tian ◽  
Inthavong ◽  
Tu

Rats have been widely used as surrogates for evaluating the adverse health effects of inhaled airborne particulate matter. This paper presents a computational fluid and particle dynamics (CFPD) study of particle transport and deposition in an approximate rat central airway model. The geometric model was constructed based on magnetic resonance (MR) imaging data sourced from previous study. Lung-inhalable particles covering a diameter range from 20 nm to 1.0 µm were passively released into the trachea, and the Lagrangian particle tracking approach was used to predict individual particle trajectories. Overall, regional and local deposition patterns in the central airway were analyzed in detail. A preliminary interspecies data comparison was made between present rat models and previously published human data. Results showed deposition “hot spots” were mainly concentrated at airway bifurcation apexes, and a gravitational effect should also be considered for inertia particles when using a rat as a laboratory animal. While for humans, this may not happen as the standing posture is completely different. Lastly, the preliminary interspecies data comparison confirms the deposition similarity in terms of deposition enhancement factors, which is a weighted deposition concentration parameter. This interspecies comparison confirms feasibility of extrapolating surrogate rat deposition data to humans using existing data extrapolation approach, which mostly relies on bulk anatomical differences as dose adjustment factors.


2004 ◽  
Vol 9 (4) ◽  
pp. 409-417 ◽  
Author(s):  
Kristina Mosén ◽  
Kjell Bäckström ◽  
Kyrre Thalberg ◽  
Torben Schaefer ◽  
Henning G. Kristensen ◽  
...  

2014 ◽  
Vol 1044-1045 ◽  
pp. 344-347 ◽  
Author(s):  
De Shuai Sun ◽  
Long Fang ◽  
Ya Li Liu

Inhalable particles suspended in air were an important pollution of atmospheric Environment. Because of very small in size, they were different to be captured by conventional filter. Chemical active agent, surfactant and flocculate, were introduced into chamber and encouraged the agglomeration of inhalable particles. Nonionic surfactant could reduce more than 30% of particles, while ionic surfactant could lead to the decrement of 23-26%. The particle removal efficiencies were only 15-18% in the presence of polymer flocculate and slightly above that of water. The larger droplet of spray favored the agglomeration of inhalable particles. Increasing the surfactant concentration resulted in the higher removal of inhalable particle.


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