Hydrometallurgy of copper
{"Image DocumentName": "Hydrometallurgy of copper", "Image ImageDescription": "2. Leaching (cont.) (c) Bacterial leaching. Several bacteria, especially Thiobacilli, are able to solubilise metal minerals by oxidising ferrous to ferric iron, as well as elemental sulphur, sulphide, and other sulphur compounds to sulphate or sulphuric acid. 20 to 25% of copper produced in the USA, and 5% of the worlds copper is obtained by bacterial leaching. Very slow process; takes years for good recovery. But low investment and operating costs.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}