| 摘要 |
<p>PURPOSE:To remove heavy metals, F, and COd components in the waste water efficiently by adding sequestering agent for heavy metals comprising inorg. flocculant, separating the solids in the produced settled product from liquid, and treating the treated liquid with amphoteric adsorbing resin. CONSTITUTION:At least one kind of sequestering agent for heavy metal comprising an inorg. flocculant selected from Al salts and Fe salts is added to the waste water produced by stack gas desulfurization, settling the flocculated product by, if necessary, adjusting the pH of the waste water, and separating the solids in the settled product from liquid. Then, the treated water is further treated with an amphoteric adsorbing resin prepd. by amphoterizing a weakly basic ion exchange resin having at least tertiary amine group as ion exchange group with a compd. expressed by the general formula: X-NH(CH2)n-COOR (wherein X is F, Cl, Br, or I; n is an integer 1-3; R is H or an alkali metal).</p> |
