Abstract
A PM0.1 sampler for the evaluation of the personal exposure to nanoparticles was designed based on a novel approach to a layered mesh inertial filter. Applications to practical environments would include roadsides and highly contaminated workplaces. The separation performances of PM0.1 sampler consisting of a layered mesh inertial filter and pre-separators for the removal of coarse particles were evaluated. The influence of particle loading on the pressure drop and separation performance, which is important from a practical standpoint, was also discussed. The novel personal sampler recorded a cutoff size of 100 nm with a small pressure drop of ~5 kPa. Through the combination of a layered mesh inertial filter for the PM0.1 and pre-cut impactors for the removal of huge or coagulated particles (PM1.4-TSP) along with a pre-cut inertial filter using webbed SUS fibers for the removal of fine particles (PM0.5-PM1.4), the present PM0.1 inlet for the personal sampler was practical for the chemical analysis of collected particles. This sampler was proven effective even under the limitations of a small-capacity portable battery pump, which was rated at less than the minimum change for separation performance. The novel PM0.1 personal sampler is compact and lightweight (under 1 kg including a portable battery pump), which is important for the practical application of a personal sampler.
Highlights
During the assessment of the health effects of airborne particulates, it is necessary to determine both the concentration and composition of the particles in the breathing zone with regards to aerodynamic particle size, which affects the regional deposition of particles inhaled into the human respiratory system
A PM0.1 sampler for the evaluation of the personal exposure to nanoparticles was designed based on a novel approach to a layered mesh inertial filter
The separation performances of PM0.1 sampler consisting of a layered mesh inertial filter and pre-separators for the removal of coarse particles were evaluated
Summary
During the assessment of the health effects of airborne particulates, it is necessary to determine both the concentration and composition of the particles in the breathing zone with regards to aerodynamic particle size, which affects the regional deposition of particles inhaled into the human respiratory system. This is important for ambient nanoparticles (< 100 nm), since they can contain a large portion of hazardous chemicals from anthropogenic sources and can penetrate deeply inside lungs, eventually reach the alveolar region. In order to evaluate health influences and risks, the monitoring of environmental nanoparticles is crucially important
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