pregnant leach solution

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Pregnant leach solution or pregnant liquor solution (PLS) is acidic metal-laden water generated from stockpile leaching and heap leaching. Pregnant leach solution is used in the solvent extraction and electrowinning (SX/EW) process.http://www.rosemonteis.us/glossary/term/285{{Dead link|date=May 2020 |bot=InternetArchiveBot |fix-attempted=yes }}{{cite web|url=https://quoteddata.com/glossary/pregnant-leach-solution/|website=quoteddata.com|title=Pregnant leach solution}}

The portion of an original liquid that remains after other components have been dissolved by a solvent is called raffinate.