“滤取”的英语可以翻译为：leaching ...

过滤剂''.'滤'.''取液体流经的物质.The substance through which a liquid is leached.碱液是从木炭中滤取的.Lye is leached from wood ashes....

“可滤取”的英语可以翻译为：leachable，leachability ...