【摘要】 针对鲁奇炉煤气化废水中酚类污染物难降解而无法满足生化处理的难题,采用热化学法制备钛铱钽催化电极（Ti/IrO₂-Ta₂O₅）,并将其作为阳极对鲁奇炉煤气化废水进行电催化降解。结果表明,当电流密度为50 m A/cm²、NaCl质量浓度为9.5 g/L、pH为4、降解时间为180 min时,苯酚和COD的去除率较高,分别可达92%和48%。废水色度极大降低,BOD/COD提高至0.42,降解后的废水可满足生化处理要求。动力学研究表明,废水降解过程符合表观一级反应的动力学规律。更多还原

【Abstract】 Ti/IrO₂-Ta₂O₅ catalytic anode prepared by thermochemical method is used for electrocatalytic degradation of Lurgi coal gasification wastewater to meet biochemical treatment requirements. The effects of current density,sodium chloride concentration,pH value,degradation time on phenol and COD removal efficiencies are investigated.The removal efficiencies of phenol and COD achieve 92% and 48%,respectively when the current density is 50 m A·cm-2,sodium chloride concentration 9. 5 g·L-1,pH value 4,and degradation time 180 min.Wastewater chroma also reduces greatly and the ratio of BOD/COD increases to 0. 42.The degraded wastewater can meet requirements of biochemical treatment.It is shown that the electrocatalytic degradation of Lurgi coal gasification wastewater accords with the apparent first-order kinetics law.更多还原