Characterization of Air Quality in Microenvironment near Personal Computers
Date Issued
2006
Date
2006
Author(s)
BAW, CHIN-KUN
DOI
en-US
Abstract
This work aims to report the results of a field study with selected indoor air pollutants – total dust, selected five volatile organic compounds (VOCs), toluene, butyl acetate, ethyl benzene, xylene and 1, 2, 4-trimethylbenzene, bacteria and fungi - which may cause possible health risk for employees and visitors. Three personal computers (PCs) were selected as test products. For each studied pollutant, samples were collected simultaneously at two locations around a PC where near the major inlet and the outlet of a PC.
For particulate matters sampled by GRIMM Dust Monitor, the sampling locations around a PC (the inlet and the outlet) can not be excluded to be a significant variable on variation of both the mass concentration (df=1, F=99.320, p<0.05) and the number concentration (df=1, F=8.232, p<0.05) by general linear models. However, it is hard to tell the mass concentration at the inlet would exceed that at the outlet in comparison to the result demonstrated by the NIOSH method 0500. There was an observable trend that the number concentration for particulates with size of 0.3-4.0μm was greater at the outlet than it at the inlet, but the concentration for particulates with size of 4.0-20.0μm was less at the outlet than it at the inlet.
The concentrations of five VOCs obtained by Portable Dynamic Air Sampler-Solid Phase Microextraction (PDAS-SPME)show only the concentration of ethyl benzene at the outlet was greater than that at inlet with marginal significant difference (U=0.000, p=0.08) at the inlet and outlet of three PCs.
The sampling of bioaerosol by the Andersen 1-stage impactor shows that the concentration of fungi was greater at the outlet than at the inlet.
Subjects
總粉塵
揮發性有機物
細菌
真菌
個人電腦
空氣品質
particulate matters
VOCs
bacteria
fungi
personal computer
air quality
SDGs
Type
thesis
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