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Characterization of Walking-induced ...

Tian, Yilin.

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Characterization of Walking-induced Particle Resuspension Using a Consistent Test Mechanism.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Characterization of Walking-induced Particle Resuspension Using a Consistent Test Mechanism./
作者:	Tian, Yilin.
面頁冊數:	118 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-02(E), Section: B.
Contained By:	Dissertation Abstracts International75-02B(E).
標題:	Environmental Sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3598483
ISBN:	9781303471100

Characterization of Walking-induced Particle Resuspension Using a Consistent Test Mechanism.
Tian, Yilin.

Characterization of Walking-induced Particle Resuspension Using a Consistent Test Mechanism. - 118 p.

Source: Dissertation Abstracts International, Volume: 75-02(E), Section: B.

Thesis (Ph.D.)--Clarkson University, 2013.

Walking-induced particle resuspension was characterized as a function of flooring type, surface dust loading, relative humidity (RH) and particle size. A consistent test mechanism was used instead of human participant to eliminate the impact of various walking style and facilitate a systematic experimental comparison. The test mechanism was capable to provide a consistent stepping rate at 0.55+/-0.03 Hz and comparable pressure loadings among different flooring types. Five types of flooring, including hardwood, vinyl, high density cut pile carpet, low density cut pile carpet and high density loop carpet, were tested with two levels of RH (40% and 70%) and surface dust loading (2 g/m2 and 8 g/m2), respectively. Flooring samples were soiled with real house dust using a reproducible seeding system. Resuspension experiments were conducted in a temperature, RH and air exchange rate (1.38 hr--1) controlled chamber.

ISBN: 9781303471100Subjects--Topical Terms:

676987
Environmental Sciences.

Characterization of Walking-induced Particle Resuspension Using a Consistent Test Mechanism.
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500 $a Adviser: Andrea R. Ferro.
502 $a Thesis (Ph.D.)--Clarkson University, 2013.
520 $a Walking-induced particle resuspension was characterized as a function of flooring type, surface dust loading, relative humidity (RH) and particle size. A consistent test mechanism was used instead of human participant to eliminate the impact of various walking style and facilitate a systematic experimental comparison. The test mechanism was capable to provide a consistent stepping rate at 0.55+/-0.03 Hz and comparable pressure loadings among different flooring types. Five types of flooring, including hardwood, vinyl, high density cut pile carpet, low density cut pile carpet and high density loop carpet, were tested with two levels of RH (40% and 70%) and surface dust loading (2 g/m2 and 8 g/m2), respectively. Flooring samples were soiled with real house dust using a reproducible seeding system. Resuspension experiments were conducted in a temperature, RH and air exchange rate (1.38 hr--1) controlled chamber.
520 $a Resuspension fraction ra (fraction of surface dust resuspended per step) for house dust was found to vary from 10--7 to 10--4 (particle size: 0.4-10 microm). In general, results showed that for particles at 0.4-3.0 microm, the difference in resuspension fraction between carpets and hard floorings was not significant. For particles at 3.0-10.0 microm, carpets exhibited higher resuspension fractions compared to hard floorings. For particles greater than 1 microm, low density cut pile carpet was associated with the highest resuspension fractions among the floorings tested. Increased RH level enhanced resuspension on high density cut pile carpet, whereas opposite effect was observed on hard floorings. Higher surface dust loading was associated with lower resuspension fractions on carpets, while on hard floorings the effect of surface dust loading varied with different RH levels.
520 $a Resuspended particle size distribution was characterized as a function of flooring type. Results showed that the smallest particles resuspended due to shoe-floor contact were about 0.1 micron in diameter from both carpet and vinyl floorings, which extends the size range (0.3-25 micron) reported in previous studies.
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