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Supported liquid membrane process for chromium removal and recovery
Supported liquid membrane process for chromium removal and recovery
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机译:支持的液膜法去除和回收铬
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摘要
The present invention is directed toward a two-step process for the removal and recovery of chromium from a feed solution, such as waste water, using supported liquid membranes (SLMs). In the first step of the process, the feed solution, which contains hexavalent chromium, is treated with a first strip solution to produce a moderately concentrated Cr(VI) solution. In the second step, the moderately concentrated Cr(VI) solution is treated with a second strip solution. The process advantageously produces a treated feed solution having a decreased concentration of chromium which is acceptable for discharge or recycle and a product solution which contains a highly concentrated Cr(VI) solution having little or no sulfate contaminants.
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