filtration
The action or process of filtering something, especially a liquid or gas, to remove impurities or solid particles.
In aquariums, it refers to three distinct processes: mechanical (trapping debris), chemical (absorbing toxins), and biological (using bacteria to break down waste).
Word relationships
- purification: 'Purification' is a broad term for making something clean, which can include chemical treatments, whereas 'filtration' specifically involves passing a fluid through a physical barrier to separate particles.
- contamination: Contamination is the introduction of impurities, whereas filtration is the removal of them.
Commonly confused with
- strainer: A strainer is a simple household tool for separating large solids from liquids, while filtration is a scientific process that can remove microscopic particles and chemical impurities.
Word family
- filter (noun, verb): A device used to remove impurities, or the act of removing them.
- filtrate (noun): The liquid that has passed through a filter.
Collocations
- water filtration
- biological filtration
- filtration system
- mechanical filtration
Example sentences
- "Without proper biological filtration, toxic ammonia from fish waste will quickly build up and harm the tank's inhabitants." A setup guide for a home aquarium.
- "The filtration of municipal drinking water involves passing it through layers of sand, gravel, and charcoal." A textbook on water treatment engineering.
Memory hook
Think of 'fill' and 'tray'—you 'fill' a 'tray' with gravel to filter the water passing through it. Straining out the bad stuff.
When not to use
Do not use when referring to simple chemical purification that does not involve passing a fluid through a physical medium.
Fun facts
- In a home aquarium, the most important filter isn't mechanical; it's the invisible colony of beneficial bacteria living inside the filter media that converts toxic fish waste into harmless compounds.
Explore more words
purifier, clarify, contamination, sterilization, Rinse, particulate
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