Question

What are two instrumental methods that are commonly used to study bioleaching. What information can be obtained using these methods?

Answer 1

Date Bioleaching: - In mic obial reaching , metals can be extracted from large quantities of low grade ores. Although recovery of metals (eg Copper) from the I drainage water of mines has been known caner the involument of microbes in this process was recognized in recent years, The bacteria which are naturally associated with the rocks can lead to bioreaching by one of The following ways - o Direct action of backend on the one to extract metale 2 Bacteria produce certain substances such as sulfuric acid and terric ison which extract the metal lindirect action). Organisms for bio reaching in The most semnly commonly used are Thiobacillus ferrooxidans and Thiobacillus throoxidans, Direct bioleaching : In this process, there is a direct enzymatic altack! on the minerals by the microorganisms. Exi- ceatain bacteria can toanger electrons C coupled with ATP production from son or culturto oxygen. That is these organisms

can obtain energy from the oxidation of Fe2t to fost o or from the oxidation of sulfur and reduced suffer compounds to sulfate. 4 resou + 2H₂sou + 7e, (504)3 f2th so 25 +30, +2H₂O → 2H, soy zres, +70, +240 Fe Cae) Indirect bioleaching - In this indirect method, the bacteria produce Strong oxidising agents such as ferric ison and sulfaric acid on ox dation of soluble isong 'soluble sceffure respectively For in direct bio leaching acidic environment is absolutely essential in order to keep terric ison and other metels in Solution. flow diagram: - Battona, nutrients, acid . MEZAL Recovere/ of Metall Body of pump beach Liquor