Distribution of Articles published per year
(2010 - 2016)
(2010 - 2016)
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Article 0 Reads 1 Citation Efficiency of five chemical protective clothing materials against nano and submicron aerosols when submitted to mechanic... Published: 05 April 2016
Journal of Occupational and Environmental Hygiene, doi: 10.1080/15459624.2015.1125490
Due to their potential toxicity, the use of nanoparticles in the workplace is a growing concern. Some studies indicate that nanoparticles can penetrate the skin and lead to adverse health effects. Since chemical protective clothing is the last barrier to protect the skin, this study aims to better understand nanoparticle penetration behaviour in dermal protective clothing under mechanical deformation. For this purpose, five of the most common types of fabrics used in protective clothing, one woven and four nonwoven, were chosen and submitted to different simulated exposure conditions. They were tested against polydispersed NaCl aerosols having an electrical-mobility diameter between 14 and 400 nm. A bench-scale exposure setup and a sampling protocol was developed to measure the level of penetration of the aerosols through the material samples of disposable coveralls and lab coat, while subjecting them to mechanical deformations to simulate the conditions of usage in the workplace. Particle size distribution of the aerosol was determined upstream and downstream using a scanning mobility particle sizer (SMPS). The measured efficiencies demonstrated that the performances of nonwoven materials were similar. Three nonwovens had efficiencies above 99%, while the woven fabric was by far, the least effective. Moreover, the results established that mechanical deformations, as simulated for this study, did not have a significant effect on the fabrics' efficiencies.
Article 0 Reads 0 Citations Effectiveness of Protective Gloves against Engineered Nanoparticles: Difficulties in Evaluation Published: 01 January 2016
International Journal of Theoretical and Applied Nanotechnology, doi: 10.11159/ijtan.2016.002
Article 0 Reads 4 Citations Experimental and numerical simulation of a two-dimensional unglazed transpired solar air collector Published: 01 July 2013
Solar Energy, doi: 10.1016/j.solener.2013.02.036
Highlights•The efficiency increases with increasing air mass fluxes.•The efficiency is relatively insensitive to the irradiation and the plenum thickness.•The heat transfer is preponderant at the front side of the absorber plate.•The heat transfer moves to the back-side with increasing air mass flux. AbstractIn this paper, the thermal efficiency of a solar air collector called unglazed transpired collector (UTC) has been investigated both experimentally and numerically. Experimental investigations were carried out in a laboratory with a controlled environment. Measurements of temperatures, air velocity and irradiance were performed for three air mass flow rates, three distinct irradiances and two plenum thicknesses. Perforations in the form of slot were selected to enable a comparison with 2D numerical simulations. Meanwhile, a commercial finite volume software was used to model the heat transfer and air flow through the collector. The CFD simulation shows good agreement with experimental results. It was found that a weak heat exchange process took place in the plenum: the maximum efficiency difference between the two plenum thicknesses (5 and 15 cm) was only 3.25%.
Article 0 Reads 0 Citations Advancement in Quebec Research on the Prevention of Risks Related to Occupational Exposure to Nanomaterials Avancement d... Published: 01 January 2013
Relations industrielles, doi: 10.7202/1023008ar
This article includes a presentation of the research priorities and achievements of the members of this nanotoxicology researcher group in the five following themes: toxicology, epidemiology, metrology/characterization, aerodynamic behaviour/ventilation, and protective equipment. The toxicology section includes a presentation of results relating to the respiratory effects of titanium dioxide (TiO2) nanoparticles in vivo and carbon nanotubes (CNT) in vitro and in vivo. Regarding occupational exposure to nanoparticles, studies that have been carried out include evaluations of mass and number concentrations, measurements of particle size distributions, as well as electron microscopy characterization of nanometric-sized particles. In the field of protective equipment, studies are being carried out to measure the penetration of nanoparticles through protective gloves and clothing under conditions simulating their use in workplaces. Furthermore, expertise has been developed at the IRSST on the measurement of filter efficiency in ventilation systems and respiratory protective equipment. Respiratory filter efficiency performance was evaluated under constant and variable airflows. The article ends with a description of the direct impacts on nanomaterial risk prevention related to the nanotoxicology researcher group.
Article 0 Reads 1 Citation Experimental and Two-dimensional Numerical Simulation of an Unglazed Transpired Solar Air Collector ☆ Published: 01 January 2012
Energy Procedia, doi: 10.1016/j.egypro.2012.11.004
In this paper, the thermal efficiency of a solar air collector called unglazed transpired collector (UTC) has been investigated both experimentally and numerically (CFD). Experimental measurements included the following variables: the temperatures of the air entering and leaving the UTC for three air mass fluxes, three distinct irradiations and two plenums thicknesses. A commercial finite volume software (Fluent) was used to model the heat transfer through the UTC. Turbulent effects were modelled by the RNG k–ɛ turbulence model. It was found that a weak heat exchange process mainly took place at the plenum; the maximum efficiency differences expected between the two plenums widths (5 and 15 cm) was 2.85%.
Article 0 Reads 0 Citations Swelling of Protective Gloves in Commercial TiO2 Nanoparticles Colloidal Solutions Published: 01 January 2012
International Journal of Theoretical and Applied Nanotechnology, doi: 10.11159/ijtan.2012.007