分会场2-2014国际固体会议报告.pptxVIP

High-efficient Copper Bio-extraction from Mine and Electronic Wastes by Iron/sulfur Oxidizing Acidophiles;? A large quantity of mine wastes, such as mill tailing, waste rock and low-grade ore, exist throughout the world with the continuous decrease in the grade of valuable minerals in ore deposits. ? Mine wastes, dumped in tailing impoundments and seepage, leads to the formation of acid mine drainage (AMD) in the mining industry.;? E-wastes such as the flotation tailings of waste copper-clad plate as a major part of electrical and electronic equipment has been increasing sharply. ? The flotation tailings contain 0.5%-1.0% of copper as metallic constituents, and the concentration of copper in this wastes is close to the average grade of copper mine (0.8%) in our country.;? Mine wastes or waste copper-clad plates are the major industrial pollutant that disperses heavy metal ef?uent into the environment, which can severely contaminate surface and ground-water, as well as soils, and finally have serious human health and ecological implications. ? Recycling of mine wastes and waste copper-clad plate is an important and meaningful subject not only for the protection of environment but also for the recovery of valuable materials, such as copper. ? Therefore, how to recycle and utilize these materials efficiently is an interesting issue! ;?Bioleaching, which exploits microbiological processes to convert an insoluble metal compound into a water soluble form, is regarded as one of the most promising and revolutionary biotechnologies due to its low capital investment, environment friendly, mild reaction and low energy consumption. ?Bioleaching has proven efficacy in extracting gold, copper, cobalt, nickel, zinc and uranium from mine wastes, contaminated sediments, electronic wastes, ?y ashes and battery waste, etc.;The Flowsheet of Biometallurgical Technology;Bioleaching heap;High-efficient Copper Bio-extraction from Mine wastes by a Moderately Thermophilic Cult