Which of the following describes filtration methods?

Filtration methods primarily utilize the mechanisms of interception, diffusion, impaction, and electrostatic attraction to remove particles from a gas or liquid. These processes are essential in determining how well a filter can trap various contaminants. Interception occurs when particles follow a fluid path and come into contact with a fiber, while diffusion pertains to the movement of smaller particles. Impaction happens when larger particles can't follow the flow of the air (or liquid) and collide with the filter media. Electrostatic attraction can enhance the effectiveness of filtration, especially for fine particles, making filters more efficient. This comprehensive understanding of the filtering mechanisms supports the use of filtration methods across various applications in industrial hygiene.

The other methods mentioned do relate to different processes of separating or treating substances but do not specifically encompass the principles underlying filtration as effectively. Absorption and adsorption refer to the process of capturing substances at the molecular level, which is distinct from the physical separation methods of filtration. Heat and chemical treatments involve altering the physical or chemical state of a substance rather than mechanically filtering out particles. Concentration and condensation techniques focus on altering the concentration of substances but do not directly relate to the filtration approach.