Which of the following is typically NOT a method of collecting particles in air filtration?

In air filtration, various methods are employed to collect particles from the air, enhancing indoor air quality. One widely recognized method is mechanical filtration, where physical barriers such as filter media trap particles based on size. Electrostatic charging is another effective technique, using charged particles to attract and collect airborne particles, thereby improving filtration efficiency.

Chemical neutralization, while not as common as the previous methods, can still play a role in air treatment systems, particularly for odors or harmful gases, by altering their chemical structure or promoting reactions that neutralize them.

Magnetic attraction, on the other hand, is not a conventional means of collecting airborne particles in air filtration. Magnetic fields can attract ferromagnetic materials, but most particulate matter found in air, like dust or pollen, is not magnetic and therefore cannot be effectively removed through this method. Consequently, magnetic attraction is typically not utilized in standard air filtration technologies, making it the correct choice for the question regarding methods not used for collecting particles.