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Filtration00:53

Filtration

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Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...
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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
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Efficient air purification using porous ceramic-based bubble-enhanced filtration system.

Junkai Ren1,2, Ran Gao3,4, Angui Li5,6

  • 1School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi, China.

Communications Engineering
|November 29, 2025
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Summary
This summary is machine-generated.

A novel porous ceramic-based bubble-enhanced filtration system (PCBEFS) offers superior wet removal of particulate matter and multiple air purification functions. This innovative system overcomes limitations of existing technologies for effective indoor air quality management.

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Area of Science:

  • Materials Science
  • Environmental Engineering
  • Chemical Engineering

Background:

  • Dry filtration materials have high initial efficiency but poor regenerability and limited functionality.
  • Liquid-based purification methods offer high capture potential but struggle with material strength, fabrication, and scalability.
  • Existing air purification technologies face challenges in achieving multifunctional performance and long-term usability.

Purpose of the Study:

  • To develop a novel porous ceramic-based bubble-enhanced filtration system (PCBEFS) for multifunctional indoor air purification.
  • To investigate the performance of PCBEFS in removing particulate matter, formaldehyde, and providing air humidification and antibacterial functions.
  • To establish a mathematical model elucidating the structure-activity relationship and capture mechanisms within the PCBEFS.

Main Methods:

  • Fabrication of tunable porous ceramics acting as bubble generators within a water medium.
  • Integration of porous ceramics into a bubble-enhanced filtration system for air purification.
  • Development of an empirical mathematical model correlating pore structure, bubble characteristics, and removal efficiency.

Main Results:

  • The PCBEFS demonstrated highly efficient wet removal of particulate matter.
  • The system simultaneously provided air humidification, formaldehyde removal, and antibacterial functions.
  • The established mathematical model revealed structure-activity relationships and insights into the capture mechanism.

Conclusions:

  • The PCBEFS effectively addresses limitations of conventional and existing liquid-based air purification systems.
  • The system offers a promising solution for multifunctional indoor air pollution control with significant engineering potential.
  • The findings contribute to a deeper understanding of porous materials and gas-liquid interfaces in air purification applications.