Emission of Insoluble Mineral Particles from Ultrasonic Humidifiers

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dc.contributor.authorYao, Wenchuoen
dc.contributor.committeechairDietrich, Andrea M.en
dc.contributor.committeememberMarr, Linsey C.en
dc.contributor.committeememberGallagher, Daniel L.en
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2020-07-05T06:00:46Zen
dc.date.available2020-07-05T06:00:46Zen
dc.date.issued2018-01-10en
dc.description.abstractUltrasonic humidifier use is a potential source of human exposure to inhalable particulates. This paper focused on the behavior of insoluble iron oxides particles, and aluminum oxide particles in ultrasonic humidifiers. 10 mg/L Fe oxide particles and 5 mg/L Al oxide suspension solutions were added into tap water, as fill water for ultrasonic humidifiers operated for 14 hours. Denser, heavier particles of approximate 1.5 um diameter of iron or aluminum oxides accumulated in the humidifier reservoir. Smaller, suspended metal oxide particles of 0.22-0.57 um diameter were emitted as aerosols from humidifiers. Soluble anions and cations in tap water were present in the aerosols emitted from humidifiers. The results indicate that if suspended particles and dissolved minerals are present in source water, they will be transported in aerosolized waters.en
dc.description.degreeM. S.en
dc.format.mediumETDen
dc.identifier.othervt_gsexam:13543en
dc.identifier.urihttp://hdl.handle.net/10919/99237en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectiron oxideen
dc.subjectaluminum oxideen
dc.subjectultrasonic humidifiersen
dc.titleEmission of Insoluble Mineral Particles from Ultrasonic Humidifiersen
dc.typeThesisen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameM. S.en

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