Although the Strong Acidic water has a good bactericidal effect, having an astringent and can be used for the disinfection of the restaurants, hotels, medical and other units ,we here not saying of these aspects, what we talk about is its industry application. The acid mine water is mainly formed in air, precipitation, and bacteria in the process of oxidation by reducing the sulphide minerals in the mining, transport, mineral processing and waste rock discharge and tailings storage. As to the acidic mine water , the water amount is large, the pH values is lower, contain high concentrations of sulfate and soluble metal ions, causing serious harm to the mining area surrounding environment and human health. Acid mine water, inorganic metal salt content is high, its composition and nature is different from domestic sewage, which is also different from the industrial waste water, so we can not take the conventional sewage treatment methods.
The Alkaline neutralization method make the pH value increased, the metal ion precipitate. The method is directly to acidic water or acidic water pollution bodies of water plus an alkaline substance such as limestone production line is an application first, which is the more successful methods. The reaction mechanism of this method is relatively simple, mainly use the acid-base to raise the pH of Fe3 and Fe2 precipitation, meanwhile, adsorption through precipitation to remove AJ3 'and Cu2 + Zn and other metal ions. In theory, under certain pH, lime or limestone = dfsaDSAcx can all make the metal deposition, but due to the acidic water to be dealt with by the various tailings may contain with the reagents or ion, the precipitation and the precipitation of completion is very different; at the same time,after processing, the calcium sulfate residue generated quantity is large, so it is more likely to cause secondary pollution.
In China, acid mine water and France basically followed the milk of lime in France.In other countries, the U.S. Environmental Protection Agency think the limestone and milk of lime series process of metal ions in acid mine water is the most economical method , which is more economical than the pure milk of lime and 30% reduction in processing costs. In Japan, the processing of acidic water often use limestone for neutralizing agents, pH is about 5, added neutralizer lime, the pH value continues to rise, that is handled through the so-called Sec and metal ions Acidic water. And France in Sec has been widely used in Japan's Mitsubishi metals, fine position in mining, it is widely used in the mining industry and the Kosaka mining region.
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