适用于高氯氨氮废水电催化处理的Ru-Ir电极合成表征及性能评价  

SYNTHESIS,CHARACTERIZATION AND PERFORMANCE EVALUATION OF Ru-Ir ELECTRODE FOR ELECTROCATALYTIC TREATMENT FOR AMMONIA-NITROGEN WASTEWATER WITH HIGH CHLORIDE CONTENT

作　　者：杨振兴 谢文玉[2] 李德豪[2] 阎光绪[1] 郭绍辉[1] YANG Zhenxing;XIE Wenyu;LI Dehao;YAN Guangxu;GUO Shaohui(Beijing Key Laboratory of Oil and Gas Pollution Control,China University of Petroleum-Beijing,Beijing 102249,China;Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]中国石油大学(北京)油气污染防治北京市重点实验室,北京102249 [2]广东石油化工学院广东省石油化工污染过程与控制重点实验室,广东茂名525000

出　　处：《环境工程》2022年第7期165-171,185,共8页Environmental Engineering

基　　金：中国石油大学(北京)科学基金(2462020XKJS04)。

摘　　要：研究了钌铱摩尔比对钌铱电极微观结构、化学性质、电化学性能和脱氮性能的影响。采用电化学方法测试了电极的电化学性能。结果表明:Ru-Ir固溶体为金红石晶体,晶粒分布均匀,连接紧密。随着Ir摩尔比的增加,Ru-Ir电极的电化学性能先升高后降低。当n(Ru)∶n(Ir)为2∶1时,Ru_(2/3)Ir_(1/3)O_(2)电极的电化学性能最佳。Ru_(2/3)Ir_(1/3)O_(2)电极的析氯电位、腐蚀电流密度和电导率分别是RuO_(2)电极的0.998,0.755,1.816倍。在处理高氯氨氮模拟废水时,利用合成电极氧化脱除氨氮的结果表明,Ru_(2/3)Ir_(1/3)O_(2)电极的处理效果最好,当电流为0.5 A时,50 min内氨氮脱除率可达到75.2%,证明了电催化技术能有效处理高氯氨氮废水。In this paper,the effect of the molar ratios of ruthenium(Ru)-iridium(Ir)on the microstructure,chemical properties,electrochemical performance,and denitrification performance of high ammonia-chloride wastewater were investigated.The results illustrated that Ru-Ir solid solution was a rutile crystal with uniform grain distribution and tight connection.The electrochemical performances of the electrodes were tested by electrochemical techniques.And the electrochemical performance of the Ru-Ir electrode first increased and then decreased with the increase of the molar ratio of Ir.The electrochemical properties of Ru_(2/3)Ir_(1/3)O_(2) electrodes were the best when the molar ratio of Ru-Ir was 2∶1.The chlorine evolution potential,corrosion current density,and conductivity of Ru_(2/3)Ir_(1/3)O_(2) electrode were 0.998,0.755,and 1.816 times those of RuO_(2),respectively.In the removal process of ammonia-nitrogen in high chloride ammonia-nitrogen simulated wastewater,the electrode with the best removal effect of ammonia-nitrogen was Ru_(2/3)Ir_(1/3)O_(2) electrode,and when the current was 0.5 A,the ammonia-nitrogen removal rate could reach 75.2%in 50 minutes.This paper proved that electrocatalytic technology could effectively treat high chloride ammonia-nitrogen wastewater.

关 键 词：高氯氨氮废水 Ru-Ir摩尔比 Ru2/3 Ir1/3O2电极 电催化技术 

分 类 号：X703[环境科学与工程—环境工程]