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作者报道了用硅铁作为阳极,在非隔膜电解槽中电解制备了新型高效水处理剂高铁酸钠,并探索了最佳反应条件.当槽电压为3～7V,电流密度为40mA·cm-2,用含1%硅酸钠的40%的氢氧化钠为电解液,反应体系温度控制在35～40℃,电解180min,电流效率可达43.0%,可得到浓度为0.078mol·L-1的高铁酸钠.实验表明,用硅铁作阳极材料,比碳钢、镀锌铁皮、铸铁等阳极材料的电流效率以及电解产率都高得多.
The authors reported the use of ferrosilicon as an anode in a non-membrane electrolyzer electrolysis prepared a new type of high-efficiency water-treatment agent sodium ferrate and explored the best reaction conditions.When the cell voltage is 3 ~ 7V, the current density of 40mA · cm- 2, using 1% sodium silicate containing 40% sodium hydroxide as electrolyte, the reaction temperature was controlled at 35 ~ 40 ℃, electrolysis 180min, the current efficiency of up to 43.0%, can be obtained at a concentration of 0.078mol·L-1 Of ferrate.The experiments show that the use of ferrosilicon as the anode material, than the carbon steel, galvanized iron, cast iron and other anode material current efficiency and electrolysis yield are much higher.