Research Article
Chloride Ion Removal from the Wet Flue Gas Desulfurization and Denitrification Wastewater Using Friedel’s Salt Precipitation Method
Table 2
Results of Cl− and SO42− removal.
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Two-stage Freund’s salt precipitation method. (1) The first stage mainly removed SO42− (4000 mg/L), the molar ratio of Ca(OH)2 to NaAlO2 to SO42− was constant at 4 : 1 : 1; the solution’s temperature was 25°C, reaction time was 30 min, and the stirring speed was 400 r/min. (2) The second stage mainly removed Cl− (2000 mg/L), the molar ratio of Ca(OH)2 to NaAlO2 to Cl− was constant at 6 : 3 : 1, respectively, and other operating conditions were the same as the first stage. |