METHOD OF TREATING ANTIMONY-CONTAINING WATER

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PROBLEM TO BE SOLVED : To provide an antimony removing method capable of simply and economically treating antimony-containing water using a small amount of a chemical agent while reducing the production amount of sludge in highly treating the antimony-containing water, wherein antimony is contained in water to be treated at a concentration of 2 mg/L or above, to reduce the concentration of antimony to 0.2-0.01 mg/L.SOLUTION : This method of treating the antimony-containing water includes a first process for adding a ferric salt and an alkali agent to water to be treated containing antimony to precipitate and separate antimony to obtain antimony-containing water with a concentration of 2 mg/L or below and a second process for succeedingly adding a rare-earth element salt solution based on cerium and the alkali agent to the separated solution in the first process to separate the residual antimony as a hardly soluble precipitate to reduce the concentration of antimony in the separated solution to 0.2-0.01 mg/L.COPYRIGHT : (C)2011, JPO&INPIT