A method of leaching copper from a copper sulfide ore which includes adding a potential adjustment agent for lowering a potential of a leaching solution obtained after leaching copper from the copper sulfide ore by using iodide ion and iron (III) ion, the leaching solution being stored in a tank for storing the leaching solution.

The present disclosure relates to the use of a wetting agent such as a non-ionic wetting agent and a reagent comprising a thiocarbonyl functional group, for example, in a method/process or use for extracting a base metal such as copper from a material comprising the base metal. Such methods/processes can comprise contacting the material under acidic conditions with the wetting agent and the reagent comprising the thiocarbonyl functional group; and optionally recovering the base metal.

The present disclosure relates to the use of a wetting agent such as a non-ionic wetting agent and a reagent comprising a thiocarbonyl functional group, for example, in a method/process or use for extracting a base metal such as copper from a material comprising the base metal. Such methods/processes can comprise contacting the material under acidic conditions with the wetting agent and the reagent comprising the thiocarbonyl functional group; and optionally recovering the base metal.

The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metals using a microorganism.

The invention relates to a process for recovering metals from aqueous solutions or solid feedstocks such as ores and waste. In particular, the invention relates to a method of recovering a target metals using a microorganism.

Suggested is a method for recovering precious metals from secondary resources comprising or consisting of the following steps: (a) providing a source of solid waste material comprising precious metals in an amount of at least 0.0001% b.w.; (b) bringing said waste material into contact with heterotrophic micro-organisms capable of producing and releasing hydrocyanic acid; (c) adding a solvent or an aqueous nutrient solution capable of serving as a nutrient source for said micro-organisms to the mixture; (d) depleting said waste materials from the precious metals contained therein by complexation of the metals with said hydrocyanic acid released by said micro-organisms; (e) separating the depleted solid waste material from the liquid containing the metal-cyano complexes; (f) recovering the precious metals from their cyano-complexes in known manner.

Suggested is a method for recovering precious metals from secondary resources comprising or consisting of the following steps: (a) providing a source of solid waste material comprising precious metals in an amount of at least 0.0001% b.w.; (b) bringing said waste material into contact with heterotrophic micro-organisms capable of producing and releasing hydrocyanic acid; (c) adding a solvent or an aqueous nutrient solution capable of serving as a nutrient source for said micro-organisms to the mixture; (d) depleting said waste materials from the precious metals contained therein by complexation of the metals with said hydrocyanic acid released by said micro-organisms; (e) separating the depleted solid waste material from the liquid containing the metal-cyano complexes; (f) recovering the precious metals from their cyano-complexes in known manner.

Described in this disclosure are rare earth element (REE)-binding proteins (e.g., lanthanide-binding proteins), host cells expressing the REE-binding proteins, and methods of recovering REEs.

Described in this disclosure are rare earth element (REE)-binding proteins (e.g., lanthanide-binding proteins), host cells expressing the REE-binding proteins, and methods of recovering REEs.

The invention relates to a method for recovering precious metals from electronic waste utilising biometallurgical techniques. In one aspect, a method of recovering one or more target metals from electronic waste, includes (a) removing at least a portion of non-target material from the electronic waste or grinding to a preselected size particle to give pre-processed electronic waste; (b) contacting the pre-processed electronic waste with a lixiviant such that at least a portion of the target metal(s) dissolve into the lixiviant to produce a pregnant solution; (c) contacting a microorganism with the pregnant solution such that at least a portion of the target metal(s) ions biosorb to the microorganism wherein the microorganism becomes metal laden and the pregnant solution becomes barren; (d) substantially separating the metal laden microorganism from the barren solution; and (e) recovery of the target metal(s) from the metal laden microorganism.