filtration
noun [ U ] uk/fɪlˈtreɪ.ʃən/ us/fɪlˈtreɪ.ʃən/
过滤；滤除
the act of passing a liquid or gas through a piece of equipment in order to remove solid pieces or other substances
a filtration unit/plant 过滤器／厂
The technology exists to remove all of these contaminants through filtration. 这一技术就是利用过滤的方法除去这些污染物的。