Investigation of virus filtration performance of air purifier filters and virus survival in filters

2021 ◽  
Vol 20 (2) ◽  
pp. 156-165
Author(s):  
Yeeun Kim ◽  
◽  
Minyeong Kang ◽  
Seokhun Lee ◽  
Chaeyoung Hong ◽  
...  
Keyword(s):  
Filtration Performance ◽  
Air Purifier ◽  
Virus Filtration ◽  
Virus Survival

APPLICATION OF TITANIUM OXIDE COATINGS FOR NEUTRALIZATION OF HAZARDOUS CHEMICAL SUBSTANCES

2019 ◽  
Vol 2 (12) ◽  
pp. 131-136
Author(s):  
О. Halak ◽  
N. Poltorak ◽  
О. Kravchuk ◽  
V. Synko ◽  
Y. Korol
Keyword(s):  
Ultraviolet Rays ◽  
Gaseous Emissions ◽  
Oxide Coatings ◽  
Mobile Objects ◽  
Hazardous Chemical ◽  
Catalytic Material ◽  
Air Purifier ◽  
Domestic Use ◽  
Purification Methods ◽  
Plasma Electrolytic

Contamination of hazardous chemicals is currently considered one of the major environmental problems. The methods of purification of gaseous emissions depending on the physicochemical properties of pollutants, in particular dangerous chemical, their aggregate state, concentration in the gas environment are studied in this article. The effect of aerosol content such as dust and soot is analyzed as well as the efficiency of purification methods at different temperature intervals, methods of purification of multicomponent mixtures. The comparative characteristics of thermochemical, reagent, sorption and catalytic methods are given and the prospects of their application in filtering systems of stationary and mobile objects are evaluated. It has been proved that almost any organic compounds can be oxidized (mineralized) on the TiO2surface. In practice, any photocatalytic air purifier includes a porous TiO2 deposited carrier, which is irradiated with ultraviolet rays and through which air is purged. Photocatalysis is suitable for domestic use as it can occur at room temperature. For example, a thermocatalytic method of destroying harmful substances requires preheating the air to a temperature above 200 ° C. Photocatalysis destroys substances that penetrate even through activated carbon filters. Features of formation of oxide coatings by plasma-electrolytic oxidation of titanium alloys are considered. It is proposed to refine the design of collective defense systems on armored vehicles and stationary facilities with additional installation in the filter-absorber of the grid with the deposited layer of catalytic material, which will neutralize various types of dangerous chemicals due to photocatalytic air purification.

CFD-DEM simulation of the hydrodynamic filtration performance in balaenid whale filter feeding

2021 ◽  
pp. 147696
Author(s):  
Ya-Wei Zhu ◽  
De-An Hu ◽  
Chang-Ran Li ◽  
Chen Zhuang ◽  
Gang Yang
Keyword(s):  
Filter Feeding ◽  
Dem Simulation ◽  
Filtration Performance ◽  
Hydrodynamic Filtration

Rapid and eco-friendly technique for surface modification of TFC RO membrane for improved filtration performance

2021 ◽  
Vol 9 (3) ◽  
pp. 105227
Author(s):  
Ying Siew Khoo ◽  
Woei Jye Lau ◽  
Yong Yeow Liang ◽  
Mustafa Karaman ◽  
Mehmet Gürsoy ◽  
...  
Keyword(s):  
Surface Modification ◽  
Filtration Performance ◽  
Ro Membrane
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