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Related Concept Videos

Filtration00:53

Filtration

4.6K
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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Physical Methods for Controlling Microbial Growth: Radiation and Filtration01:26

Physical Methods for Controlling Microbial Growth: Radiation and Filtration

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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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Progress on particulate matter filtration technology: basic concepts, advanced materials, and performances.

Hui Liu1, Chunyan Cao, Jianying Huang

  • 1College of Chemical Engineering, Fuzhou University, Fuzhou 350116, P. R. China. jyhuang@fzu.edu.cn yklai@fzu.edu.cn.

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Controlling particulate matter (PM) pollution is challenging due to its complex nature. This review summarizes recent advancements in air filtration materials and strategies for effective PM removal and enhanced performance.

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Area of Science:

  • Environmental Science
  • Materials Science
  • Chemical Engineering

Background:

  • Particulate matter (PM) pollution poses significant environmental and health risks.
  • Controlling PM pollution is challenging due to particle complexity, diverse sources, and intricate evolution.
  • Advanced air filtration strategies are crucial for mitigating PM-induced haze.

Purpose of the Study:

  • To systematically review recent progress in air filtration for particulate matter treatment.
  • To cover the definition, characterization, capture mechanisms, and advanced materials for PM filtration.
  • To discuss special multifunctional performances and future prospects in filtration material development.

Main Methods:

  • Literature review of recent advancements in air filtration for PM.
  • Analysis of PM characterization parameters including removal efficiency, pressure drop, and quality factor.
  • Examination of advanced purification materials and their multifunctional properties.

Main Results:

  • Key parameters for PM characterization include removal efficiency, pressure drop, flow rate, quality factor, and optical transparency.
  • Advanced filters require special properties like thermal stability, antibacterial activity, flame retardancy, recyclability, and specific wettability.
  • Material choice and structural design are critical for future filtration material development.

Conclusions:

  • Effective air filtration requires understanding PM characteristics and employing advanced materials.
  • Multifunctional properties are essential for advanced filters to perform under extreme conditions.
  • Future research should focus on novel material selection and innovative structural designs for improved PM filtration.