Mining effluent can contain various pollutants, including metals, chemicals, and suspended solids. Trace amounts of precious metals can be found in the effluent, which can come from different sources, including:
Ore processing: metals can dissolve in water during the processing of ore and end up in the effluent.
Leaching: some mining operations use chemicals like cyanide or sulfuric acid to extract metals from ore, which can end up in the effluent.
Tailings: leftover materials, known as tailings, can contain metals that were not fully extracted during ore processing. When stored in large impoundments, tailings can leach into the surrounding groundwater and surface water. Please visit here https://watermanaustralia.com/recovery-of-precious-metals-from-mining-effluent/ for more details.  

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