电化学制备高铁酸钾用于强化电动修复苯酚污染

研究电化学方法制备高铁酸钾,通过单因素实验确定最佳工艺条件为：电解液KOH浓度16 mol/L,电解时间为6 h,反应温度为65℃,阳极表观电流密度为50 A/m^2,制得高铁酸钾的浓度可达5.72 mmol/L。对高铁酸钾强化电动修复技术去除土壤中的苯酚进行初探,结果表明该技术可以大幅度提高苯酚污染的修复效能,在反应120 h后,苯酚的去除率可达到90%以上,而且产生的Fe（OH）固体无毒无害,不会对环境造成二次污染。

A preliminary study on utilising electrochemically prepared potassium ferrate in the enhanced remediation of phenol contaminated soil

Potassium ferrate was prepared by electrochemical methods. The optimum process conditions were determined by single factor experiments. Under the optimum process conditions of an electrolyte KOH concentration of 16 mol /L,at an electrolysis period of 6h and a reaction temperature of 65 ℃,the anode＇s apparent current density of 50 A /m^2,the concentration of potassium ferrate amounts to 5. 72 mmol /L. The removal efficiency of phenol in simulated soil by ferrate enhanced electro-kinetic remediation was studied. The results show that the potassium ferrate can enhance the removal efficiency of phenol in soil compared with the electro-kinetic remediation alone. After 120 h of ferrate enhanced electro-kinetic remediation,the removal efficiency could reach over 90% and Fe（OH）3 as the residual product would not cause the secondary pollution to environment due to its non-toxicity.