本研究采用电-Fenton/三维电极联合技术降解苯酚废水,利用铁改性膨润土(Fe-Bent)作为粒子电极,考察了溶液初始pH、苯酚初始浓度、电流密度、电极间距及电解质浓度等电化学体系操作条件对苯酚降解效果的影响;同时监测了反应过程中铁离子和羟基自由基浓度的变化情况.结果表明,溶液初始pH =3,电流密度125 mA/cm2,苯酚初始浓度100 mg/L,电极间距1.O cm,电解质浓度0.05 mol/L,电解时间180m in时,苯酚的转化率可达到67.53％,COD去除率达57.11％.此时,溶液中铁离子的浓度为6.93 mg/L,沥出的铁离子较少,说明粒子电极较稳定.
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