Effect of turbulence intensity and particle characteristics on the deposition of submicron particles enhanced by the ionic air purifier

Yu, Kuo Pin; Shih, Hui Chi; Chen, Yen‐Chi; Yang, Xuan

doi:10.1016/j.buildenv.2016.12.023

Cited by 15 publications

(4 citation statements)

References 24 publications

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“…The velocity of PM electro-mobility is dependent on amount of particle charge, particle size and the electrical field intensity [46]. Moreover, the release of NAIs can increase the mass concentration of PM through coagulation and improve the rate of removal [47]. The highest removal of PM 10 , PM 2.5 and PM 1 was observed in RB17 (93%), RB 10 (94%) and RB8 (81%), respectively.…”

Section: Correlations Of Pm With Meteorological Parametersmentioning

confidence: 99%

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Nadali

Arfaeinia

Asadgol

et al. 2020

Environmental Pollutants and Bioavailability

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The present work was conducted in a two-part study. In part I, the levels of indoor and outdoor PM 10 , PM 2.5 , and PM 1 was measured using real time GRIMM dust monitors. In part II, the performance of NAIs method was investigated on reduction of indoor concentration of PM in these residential buildings for the first time. Hourly average concentration and standard deviation (SD) of PM 10 in indoor and outdoor at residential buildings were 63.5 ± 27.4 and 90.1 ± 33.5 µg/m 3 , respectively. Indoor and outdoor concentrations of PM 2.5 in residential buildings were 39.4 ± 18.1 and 49.5 ± 18.2 µg/m 3 and for PM 1 the concentrations were 4.3 ± 7.7 and 6.5 ± 10.1 µg/m 3 , respectively. We estimated that nearly 71.47% of PM 10 , 79.86% of PM 2.5 and of 61.25% of PM 1 in indoor of residential buildings can be removed by negative air ions.

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Section: Correlations Of Pm With Meteorological Parametersmentioning

confidence: 99%

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Nadali

Arfaeinia

Asadgol

et al. 2020

Environmental Pollutants and Bioavailability

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“…The knowledge of particle deposition onto surfaces can contribute to the decrease in indoor airborne particle concentration, as well as exposures (Lai, 2002). Particle deposition in indoor environments or experimental chambers has been widely studied (Cheng, 1997;Lai et al, 2008;Lai, 2006;Thatcher and Nazaroff, 1997;Thatcher et al, 1996;Thatcher, et al, 2002;Xu et al, 1994;Yu et al, 2017), most of which focus on non-patterned surfaces with different roughness. Hussein et al (2009) studied the deposition rate of aerosol particles (diameters between 0.03 and 5 μm) on rough surfaces like wallpapers, wall-plaster, and two types of carpets in a chamber environment.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of particle deposition on patterned microstructured surfaces in a chamber environment

Zhong

Chan

et al. 2021

Journal of Aerosol Science

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“…In this paper, the agglomerated particles of this metakaolin were controlled between 300 and 500 nm at most and according to the transmission electron microscopy (TEM) results. Since the particle size of the aggregate of this metakaolin ranges from 100 nm to 1.0 µm [33], it is a submicron material [34][35][36][37]; this type of ultrafine metakaolin is named submicron metakaolin (SMK) in this work. Finally, with a simpler manufacturing process, submicron metakaolin has a slightly larger particle size than nanometakaolin.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical and Microstructural Properties of Portland Cement Composites Modified with Submicron Metakaolin

Wang

Jiang

et al. 2020

Advances in Civil Engineering

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This work aims to study the influence of submicron metakaolin (SMK) on the mechanical strength, pore structure, and microstructural properties of hardened cement-based slurry (HCS). Portland cement was replaced by SMK at a proportion of 1, 3, 5, and 7 wt%. The compressive strength and flexural strength of the HCS samples were tested at a curing period of 3, 7, 14, and 28 days, and the pore structure of the specimens was analyzed by mercury intrusion porosimetry (MIP) at a curing period of 3 and 28 days. The microstructure characteristics of the hardened samples were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Thermogravimetric analysis (TGA) was also employed to analyze the change in the chemical composition of the HCS. The results showed that the SMK could accelerate the hydration rate of the cement and could improve the mechanical properties of the HCS; the compressive strength and flexural strength of the HCS samples were remarkably enhanced, compared to those of the plain cement, by 67 and 46%, respectively, at a curing period of 3 days and by 33 and 35%, respectively, at a curing period of 28 days. The SMK had a significant impact on the internal pore structure of the hardened samples, and the number of pores with a diameter of larger than 3000 nm significantly decreased. Because the hydration products filled the pores, the microstructure of the HCS was further refined and densified with the addition of SMK. Submicron metakaolin has a simple process and high activity, which can significantly improve the performance of the cement slurry. Therefore, submicron metakaolin has the potential for practical engineering applications.

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Effect of turbulence intensity and particle characteristics on the deposition of submicron particles enhanced by the ionic air purifier

Cited by 15 publications

References 24 publications

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Experimental study of particle deposition on patterned microstructured surfaces in a chamber environment

Enhanced Mechanical and Microstructural Properties of Portland Cement Composites Modified with Submicron Metakaolin

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Effect of turbulence intensity and particle characteristics on the deposition of submicron particles enhanced by the ionic air purifier

Cited by 15 publications

References 24 publications

Indoor and outdoor concentration of PM10, PM2.5 and PM1 in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Indoor and outdoor concentration of PM10, PM2.5 and PM1 in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Experimental study of particle deposition on patterned microstructured surfaces in a chamber environment

Enhanced Mechanical and Microstructural Properties of Portland Cement Composites Modified with Submicron Metakaolin

Contact Info

Product

Resources

About

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal

Indoor and outdoor concentration of PM₁₀, PM_2.5 and PM₁ in residential building and evaluation of negative air ions (NAIs) in indoor PM removal