Wenchuo Yao

Wenchuo Yao
Virginia Polytechnic Institute and State University | VT · Department of Civil and Environmental Engineering

Doctor of Philosophy

About

8
Publications
1,236
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103
Citations
Introduction
My research is on the effects of ultrasonic humidifier emissions on indoor air quality, its variance affected by drinking water quality, and consequent inhalation risk assessment for adults and children.

Publications

Publications (8)
Article
The commonly used consumer product of an ultrasonic humidifier emits fine particles containing metals from tap water used to fill the humidifier. The objectives are: 1) predict emitted indoor air inhalable metal concentrations produced by an ultrasonic humidifier filled with tap-water containing As, Cd, Cr, Cu, Mn, and Pb by an ultrasonic humidifie...
Article
The essential trace element manganese (Mn) can cause neurotoxicity with inhalation acknowledged as a more severe health and cognition threat than ingestion. Methods: Over a range of aqueous Mn concentrations present in tap water, this research characterizes exposures and risks for adults and 0.25, 1, 2.5, and 6 yr old children who ingest the wate...
Article
Room-sized ultrasonic humidifiers are exposure pathways to aerosolized metals, with dose positively associated with increased concentrations of metals in fill water. This study innovatively quantifies water ingestion along with inhalation doses from humidifiers for 10-1000 μg/L dissolved lead (Pb) in tap water. The subsequent indoor air Pb concentr...
Article
Full-text available
Ultrasonic humidifiers provide indoor relief to symptoms caused by dry air and produce aerosols containing both water and minerals that are present in the water that fills the humidifier. This study investigated the spatial distributions, concentrations, and metal and mineral composition of aerosols emitted when an ultrasonic humidifier was filled...
Article
Full-text available
Fine particulates and aerosols emitted by commonly used, room-sized ultrasonic humidifiers may pose adverse health effects to children and adults. The literature documents adverse effects for children exposed to minerals emitted from humidifiers. This study performs novel and comprehensive characterization of bivariate particle size and element con...
Article
The presence of earthy-musty odors in drinking water is a major concern for water suppliers and consumers worldwide. While geosmin and 2-methylisoborneol are the most studied earthy-musty odor-causing compounds, pyrazine and its alkyl and methoxy compounds possess similar odors and are widely distributed in nature, foods, and beverages. In this stu...
Article
Ultrasonic humidifier use is a potential source of human exposure to inhalable particulates. This research evaluated the behavior of insoluble iron oxide and aluminum oxide particles in water used to fill room-sized ultrasonic humidifiers. Solutions of 10 mg/L Fe, as iron oxide particles, or 5 mg/L Al, as aluminum oxide suspension, were added into...
Article
We studied the interaction mechanisms between carbonaceous nanomaterials (CNMs) and sulfamethoxazole (SMX) to elucidate their adsorption behaviors. Three graphene-based materials, reduced graphene oxide (rGO), graphene oxide (GO), and graphene nanoplatelet pastes (GNP), and five multiwalled carbon nanotubes (MWCNTs), MWCNT10, MWCNT15, MWCNT15-OH, M...

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Projects

Project (1)
Project
The fundamental characterization of ultrasonic humidifier aerosol composition, fate and transport under realistic living conditions, and propensity for infant, child, and adult inhalation exposure and resulting inhaled dose, will be the first of its kind for assessing this aspect of the air-water-human interface.