Characterization of the Key Material for Elimination of PM2.5 Particles in the Atmosphere

Qiu, Bo; Liu, Qingshan; Hong, Wei; Xing, Guangzhong

doi:10.1155/2015/472019

Cited by 6 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NAIs are unipolar ions and they will electrically charge PM, which will be deposited/precipitated more rapidly than uncharged ones as charged PM can attach to nearby surfaces, attach to each other and settle faster, or sink faster under the gravity [ 138 , 139 , 140 , 141 , 142 ] (available online: ).…”

Section: The Release Of Negative Air Ions As An Efficient Way To Rmentioning

confidence: 99%

Negative Air Ions and Their Effects on Human Health and Air Quality Improvement

Jiang

Ramachandran

2018

IJMS

170

View full text Add to dashboard Cite

Negative air ions (NAIs) have been discovered for more than 100 years and are widely used for air cleaning. Here, we have carried out a comprehensive reviewing on the effects of NAIs on humans/animals, and microorganisms, and plant development. The presence of NAIs is credited for increasing psychological health, productivity, and overall well-being but without consistent or reliable evidence in therapeutic effects and with controversy in anti-microorganisms. Reports also showed that NAIs could help people in relieving symptoms of allergies to dust, mold spores, and other allergens. Particulate matter (PM) is a major air pollutant that affects human health. Experimental data showed that NAIs could be used to high-efficiently remove PM. Finally, we have reviewed the plant-based NAI release system under the pulsed electric field (PEF) stimulation. This is a new NAI generation system which releases a huge amount of NAIs under the PEF treatment. The system may be used to freshen indoor air and reduce PM concentration in addition to enriching oxygen content and indoor decoration at home, school, hospital, airport, and other indoor areas.

show abstract

Section: The Release Of Negative Air Ions As An Efficient Way To Rmentioning

confidence: 99%

Negative Air Ions and Their Effects on Human Health and Air Quality Improvement

Jiang

Ramachandran

2018

IJMS

170

View full text Add to dashboard Cite

show abstract

“…Ionizers typically produce negative air ions (NAIs), which are unipolar ions that can electrically charge particulate matter (PM). PM can be efficiently removed in the environment with a high concentration of NAIs, as the charged PM is attracted to nearby surfaces and can settle down more quickly [ 27 – 31 ]. However, a major disadvantage of many ionizers is the emission of ozone, which is harmful to human health [ 32 – 34 ].…”

Section: Introductionmentioning

confidence: 99%

The Efficacy of Plant-Based Ionizers in Removing Aerosol for COVID-19 Mitigation

et al. 2021

View full text Add to dashboard Cite

Small-sized droplets/aerosol transmission is one of the factors responsible for the spread of COVID-19, in addition to large droplets and surface contamination (fomites). While large droplets and surface contamination can be relatively easier to deal with (i.e., using mask and proper hygiene measures), aerosol presents a different challenge due to their ability to remain airborne for a long time. This calls for mitigation solutions that can rapidly eliminate the airborne aerosol. Pre-COVID-19, air ionizers have been touted as effective tools to eliminate small particulates. In this work, we sought to evaluate the efficacy of a novel plant-based ionizer in eliminating aerosol. It was found that factors such as the ion concentration, humidity, and ventilation can drastically affect the efficacy of aerosol removal. The aerosol removal rate was quantified in terms of ACH (air changes per hour) and CADR- (clean air delivery rate-) equivalent unit, with ACH as high as 12 and CADR as high as 141 ft3/minute being achieved by a plant-based ionizer in a small isolated room. This work provides an important and timely guidance on the effective deployment of ionizers in minimizing the risk of COVID-19 spread via airborne aerosol, especially in a poorly-ventilated environment.

show abstract

“…NAIs also have many beneficial effects on human health, including physically and psychologically. On the physical side, NAIs have a beneficial effect on the cardiovascular [ 3 , 4 ] and respiratory systems [ 5 ]. On the psychological side, NAIs can improve sleep quality [ 6 ], improve mood states [ 7 ] and treat chronic depression [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Different Time Scale Distribution of Negative Air Ions Concentrations in Mount Wuyi National Park

Xie

Chen

et al. 2021

IJERPH

View full text Add to dashboard Cite

The concentration of negative air ions (NAIs) is an important indicator of air quality. Here, we analyzed the distribution patterns of negative air ion (NAI) concentrations at different time scales using statistical methods; then described the contribution of meteorological factors of the different season to the concentration of NAIs using correlation analysis and regression analysis; and finally made the outlook for the trends of NAI concentrations in the prospective using the auto regressive integrated moving average (ARIMA) models. The dataset of NAI concentrations and meteorological factors measured at the fixed stations in the Mountain Wuyi National Park were obtained from the Fujian Provincial Meteorological Bureau. The study showed that NAI concentrations were correlated with relative humidity spanning all seasons. Water was an important factor affecting the distribution of NAI concentrations in different time series. Compared with other ARIMA models, the outlook value of the ARIMA (0,1, 1) model was closer to the original data and the errors were smaller. This article provided a unique perspective on the study of the distribution of negative air oxygen ions over time series.

show abstract

Characterization of the Key Material for Elimination of PM2.5 Particles in the Atmosphere

Cited by 6 publications

References 7 publications

Negative Air Ions and Their Effects on Human Health and Air Quality Improvement

Negative Air Ions and Their Effects on Human Health and Air Quality Improvement

The Efficacy of Plant-Based Ionizers in Removing Aerosol for COVID-19 Mitigation

Different Time Scale Distribution of Negative Air Ions Concentrations in Mount Wuyi National Park

Contact Info

Product

Resources

About