三维电极电催化氧化处理邻氯苯胺废水的研究

文章用粉末状活性炭作为三维电极电化学反应器的粒子电极,选择石墨板和不锈钢板分别作为阳极和阴极,组成三维电极电化学反应器。文章研究了三维电极电化学反应器对邻氯苯胺废水的电催化氧化效果,探讨了槽电压、溶液初始pH、电解时间、支持电解质浓度、电极极板间距等影响因素对邻氯苯胺废水COD的去除效果。实验结果表明:当槽电压为15.0 V,溶液初始pH为3.0,支持电解质浓度为0.10 mol/L,极板间距为2 cm,电解时间为30 min时,邻氯苯胺废水的COD去除率达到97.50%。通过紫外-可见光光谱扫描发现,由于三维电极电催化氧化作用,邻氯苯胺的苯环断裂,生成一些脂肪族物质。谱图在250~350 nm波长范围内并无其他吸收峰出现,说明溶液在降解过程中并没有生成其他大分子物质。从而证实了三维电极电化学反应器对邻氯苯胺有很好的降解效果。

Electrochemical Degradation of O-chloroaniline with Three-dimensional Electrodes

Degradation of o-chloroaniline wastewater was experimentally investigated using three-dimensional electrodes with granular activated carbon as particle electrode,graphite as the anode,and stainless steel plates as the cathode.Effects of voltage,pH value,electrolysis time,anode-cathode distance on degradation efficiency were analyzed to determine the optimum operating conditions.Results indicated that under the optimized reaction conditions as voltage 15.0 V,Na2SO4 solution 0.10 mol/L for 30 min with pH 3.0,approximately 97.50% of COD was removed.UV-visible absorption spectrum of o-chloroaniline solutions during degradation by three-dimensional electrode reactor showed that the most benzene rings have been broken down to form aliphatic substances.There were no appearance of other peaks at the wavelength range of 250~350 nm,indicating none synthetization of macromolecule.Results indicated that the effect of degradation by three-dimensional electrodes is excellent.