TY - JOUR
T1 - Design and evaluation of the field-deployable electrostatic precipitator with superhydrophobic surface (Fdepss) with high concentration rate
AU - Han, Taewon
AU - Zhen, Huajun
AU - Fennell, Donna E.
AU - Mainelis, Gediminas
N1 - Publisher Copyright:
© Taiwan Association for Aerosol Research.
PY - 2015/10/23
Y1 - 2015/10/23
N2 - Here we report on further development of an electrostatics-based bioaerosol collector with high concentration rate. We developed a field-deployable version of the electrostatic precipitator with superhydrophobic surface (FDEPSS), which consists of two combined half-cylinder collection chambers and an integrated control box. The collector is made of a static dissipative material and each collection chamber features a 3.2 mm wide collection electrode. The round top part of each chamber contains eight carbon fiber ionizers arranged in two lines of four. The collected particles are removed by a 20 μL rolling water droplet. Sampler’s components were integrated into a control box. The FDEPSS was tested with two bacterial species, Bacillus atropheus and Pseudomonas fluorescens bacteria, and one fungal spore, Penicillium chrysogenum for 10 and 60 min collection times and showed collection efficiency of ~70% at a sampling flow rate of 20 L min–1. The use of a collecting water droplet of 20 μL per collection chamber achieved sample concentration rates approaching 0.5 × 106 min–1. The FDEPSS was also tested against BioSampler (SKC Inc., Eighty Four, PA) and Button aerosol sampler (SKC Inc.) when sampling bioaerosols outdoors for 60 min. The samples were characterized based on the total airborne adenosine triphosphate (ATP) concentration, which was reported as relative luminescence units (RLU). The FDEPSS detected 5.1 × 105 RLU m–3, while the BioSampler and the Button sampler showed 4.1 × 105 RLU m–3 and 8.7 × 105 RLU m–3, respectively. Since ATP analysis can be performed with small sample volumes, and the FDEPSS captures particles into 20 μL of liquid, resulting in a high concentration rate, we show that this sampler can detect the presence of airborne microorganisms 40× faster than the BioSampler or Button aerosol sampler. This FDEPSS feature could be integrated into bioaerosol detection systems, especially where concentrations are low and time is critical.
AB - Here we report on further development of an electrostatics-based bioaerosol collector with high concentration rate. We developed a field-deployable version of the electrostatic precipitator with superhydrophobic surface (FDEPSS), which consists of two combined half-cylinder collection chambers and an integrated control box. The collector is made of a static dissipative material and each collection chamber features a 3.2 mm wide collection electrode. The round top part of each chamber contains eight carbon fiber ionizers arranged in two lines of four. The collected particles are removed by a 20 μL rolling water droplet. Sampler’s components were integrated into a control box. The FDEPSS was tested with two bacterial species, Bacillus atropheus and Pseudomonas fluorescens bacteria, and one fungal spore, Penicillium chrysogenum for 10 and 60 min collection times and showed collection efficiency of ~70% at a sampling flow rate of 20 L min–1. The use of a collecting water droplet of 20 μL per collection chamber achieved sample concentration rates approaching 0.5 × 106 min–1. The FDEPSS was also tested against BioSampler (SKC Inc., Eighty Four, PA) and Button aerosol sampler (SKC Inc.) when sampling bioaerosols outdoors for 60 min. The samples were characterized based on the total airborne adenosine triphosphate (ATP) concentration, which was reported as relative luminescence units (RLU). The FDEPSS detected 5.1 × 105 RLU m–3, while the BioSampler and the Button sampler showed 4.1 × 105 RLU m–3 and 8.7 × 105 RLU m–3, respectively. Since ATP analysis can be performed with small sample volumes, and the FDEPSS captures particles into 20 μL of liquid, resulting in a high concentration rate, we show that this sampler can detect the presence of airborne microorganisms 40× faster than the BioSampler or Button aerosol sampler. This FDEPSS feature could be integrated into bioaerosol detection systems, especially where concentrations are low and time is critical.
KW - Adenosine triphosphate (ATP)
KW - Bioaerosol detection system
KW - Concentration rate
KW - Electrostatic collection
KW - Field-deployable bioaerosol sampler
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U2 - 10.4209/aaqr.2015.04.0206
DO - 10.4209/aaqr.2015.04.0206
M3 - Article
AN - SCOPUS:84941295773
SN - 1680-8584
VL - 15
SP - 2397
EP - 2408
JO - Aerosol and Air Quality Research
JF - Aerosol and Air Quality Research
IS - 6
ER -