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| 倒极长寿命的Ti/RuO2-IrO2-RhOx电极对氨氮废水的处理效能 | |
| 引用本文： | 张月, 金华长, 陈雪明. 倒极长寿命的Ti/RuO2-IrO2-RhOx电极对氨氮废水的处理效能[J]. 环境工程学报, 2022, 16(5): 1459-1468. doi: 10.12030/j.cjee.202112101 |
| 作者姓名： | 张月 金华长 陈雪明 |
| 作者单位： | 浙江大学环境与资源学院，杭州 310058 |
| 基金项目： | 城乡供水节水和水质提升技术研究与示范(2019YFC0408801) |
| 摘 要： |  在电化学处理高硬度氨氮废水过程中，Ca2+、Mg2+等会在电场作用下富集并沉积在电极表面，引起电极结垢，最终影响氨氮去除效率。倒极除垢操作简单、脱垢效果佳，但会折损电极寿命。为了解决这一问题，研制了一种可在倒极操作下保持长寿命的Ti/RuO2-IrO2-RhOx新型电极，以用于处理上述高硬度氨氮废水。结果表明，在倒极操作下，Ti/RuO2-IrO2-RhOx电极加速寿命高达1 400 h，分别是Ti/RuO2-TiO2与Ti/IrO2-Ta2O5电极的47倍与23倍。  物理化学表征结果表明，RuO2-IrO2-RhOx涂层为致密均匀固溶体，表面有簇状晶粒析出。将研制的Ti/RuO2-IrO2-RhOx新型电极用于电解氨氮废水，发现其在析氯与氨氮去除方面均优于Ti/RuO2-TiO2和Ti/IrO2-Ta2O5。此外，氨氮浓度、电流密度以及初始氯离子浓度对氨氮去除效率均有明显影响。以上研究结果可为Ti/RuO2-IrO2-RhOx新型电极在氨氮废水的处理中的应用提供参考。  |
| 关 键 词： | 尺寸稳定性电极 倒极 除垢 电极寿命 析氯 氨氮废水 |
| 收稿时间： | 2021-12-14 |
Treatment performance of Ti/RuO2-IrO2-RhOx electrode with a long polarity inverted lifetime on ammonia nitrogen wastewater |
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| ZHANG Yue, JIN Huachang, CHEN Xueming. Treatment performance of Ti/RuO2-IrO2-RhOx electrode with a long polarity inverted lifetime on ammonia nitrogen wastewater[J]. Chinese Journal of Environmental Engineering, 2022, 16(5): 1459-1468. doi: 10.12030/j.cjee.202112101 | |
| Authors: | ZHANG Yue JIN Huachang CHEN Xueming |
| Affiliation: | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China |
| Abstract: | In the process of electrochemical treating ammonia-nitrogen wastewater with high hardness, Ca2+ and Mg2+ can be enriched and deposited on the electrode surface under the action of electric field, which will result in electrode scaling, and ultimately affect the removal efficiency of ammonia-nitrogen. The polarity-reversal descaling is simple and effective, but it can shorten the electrode lifetime. In order to solve this problem, a novel Ti/RuO2-IrO2-RhOx electrode with a long lifetime under polarity reversal operation was prepared for above wastewater treatment. The experimental results show that, under the polarity reversal operation, the accelerated lifetime of Ti/RuO2-IrO2-RhOx could reach 1 400 h, which was 47 times that of Ti/RuO2-TiO2 electrode and 23 times that of Ti/IrO2-Ta2O5 electrode, respectively. Physiochemical characterization shows that Ti/RuO2-IrO2-RhOx was a type of uniform and compact solid solution with cluster grains precipitated on its surface. The prepared Ti/RuO2-IrO2-RhOx electrode was used to electrolyze ammonia wastewater. It was found that this novel electrode was better than the conventional Ti/RuO2-TiO2 and Ti/IrO2-Ta2O5 electrodes in chlorine evolution and ammonia nitrogen removal. In addition, it was demonstrated that the ammonia nitrogen concentration, current density and initial chloride ion concentration could influence the ammonia nitrogen removal remarkably. The above research results can provide a reference for the application of Ti/RuO2-IrO2-RhOx electrode in the treatment of ammonia-nitrogen wastewater. |
| Keywords: | dimensionally stable anode polarity reversal descaling electrode lifetime chlorine evolution ammonia-nitrogen wastewater |
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