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Extracting copper from its ore
Member rating: No Rating | Words: | Submitted: Tue Aug 12 2003
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Extracting copper from its ore "Low-grade" ore is carefully poured on specially treated impermeable ground for ease, all in affect to later drain away the copper ion solution. Afterwards, the bacteria can then be sprayed, requiring acidic conditions involving a supply of Fe2+/S2- ions, carbon dioxide, oxygen, nitrogen and phosphorous containing nutrients. Furthermore, thiobacillius ferro-oxidans and thiobacillius thio-oxidans obtain the energy to survive/live by oxidising Fe2+/S2- ions; as a result they release the required metal ions into solution.[1] The copper ion solution can then be drained, allowing the copper ions to be removed using the aid of another solvent in a ligand exchange reaction. The term "ligand" refers to a specific compound with a lone pair of electrons that binds with the metal compounds to form a complex.[2] The ligand can be dissolved in an organic solvent such as kerosene, which is immiscible in water: Cu2+ (aq) + 2LH (organic) CuL2 (organic)...
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