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Cyanidation is preferred in the gold mining industry for several reasons. First, it is highly efficient; cyanide can extract up to 97% of available gold from ores, making it suitable for low-grade deposits that would otherwise be economically unfeasible to mine. Second, the process is relatively cost-effective compared to other extraction methods, such as gravity separation or amalgamation with mercury.
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1. Food Industry One of the primary uses of sodium metabisulfite is as a food preservative. It prevents browning in fruits and vegetables and inhibits the growth of bacteria, thus extending the shelf life of food products. In China, it is particularly popular in the dried fruit and wine industries. It serves as a sulfiting agent to maintain the color and flavor of products.
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