Ongoing ore depletion necessitates more in-depth analysisAnalysis to maintain processingProcessing efficiencyEfficiency as the quality and homogeneity of starting materials decline. While processingProcessing primary streams remains essential, incorporating secondary and recycled streams is increasingly important—not only to maximize operational output but also to support a sustainable future. HydrometallurgyHydrometallurgy, which employs aqueous chemistry to extract metalsMetal from ores, is particularly useful for ores with lower-gradeGrade mineral content and for metalsMetal that are difficult to extract through traditional methods like smeltingSmelting. This method is frequently applied for the extractionExtraction of metalsMetal such as copperCopper, nickelNickel, cobaltCobalt, goldGold, and rare earth elementsElements. Applications range from heap leachingHeap leaching and solvent extractionSolvent extraction to final electrowinningElectrowinning. These processes are known to be chemically and energetically demanding, with elemental concentration as a key parameter to control during processingProcessing.