水处理剂高铁酸钠的制备及其除锰离子效果

Preparation of water treatment agent sodium ferrate and the research of removing manganese iron

采用次氯酸盐氧化法,在10.00 mL质量分数为8%的次氯酸钠溶液中加入5.5 g氢氧化钠和0.70 g硫酸铁,可制备摩尔浓度为0.01 mol/L的高铁酸钠。结果表明,以硫酸铁为水处理剂,不能有效去除废水中的锰离子;废水经2 mg/L高铁酸钠处理后,剩余锰离子质量浓度降至0.097 mg/L,去除率为90%,达到了国家饮用水水质标准(GB 5749—85)。

The in - situ method was used to prepare sodium ferrate. 5.5 g sodium hydroxide and 0.70 g ferric sulfate were added into the sodium hypochlorite solution of mass fraction 8% and volume 10.00 mL and then the sodium ferrate solution of concentration 0.01 mol/L was prepared. The results showed that the manganese iron in waste water could not be removed effectively by ferrie sulfate, but when 2 mg/L sodium ferrate was used to treat the waste water, the mass concentration of manganese iron decreased to 0. 097 mg/L and the removal rate was 90%. It could meet the need of GB 5749-85.