Abstract:To address the issue of insufficient polarization of auxiliary electrodes (AEs) in magnetically assembled electrodes, five types of magnetically assembled electrodes were constructed using five different AEs: CNT/Fe3O4、Fe3O4/MnO2、Fe3O4/Co3O4、Fe3O4/RuO2, and ferrocarbon particles (FC). This study examined the effects of tourmaline on the electrochemical performance of each electrode and its impact on wastewater treatment efficiency. The results demonstrate that tourmaline can significantly enhance the polarization process of AEs, increase the active surface area of the electrodes by up to 28.47%, improve the degradation efficiency of simulated acid red G wastewater by up to 108.06%, and enhance the mineralization efficiency of real petrochemical wastewater by up to 10.61%.
[1] 杨瑞锋,贾波,冯庆,等.钛涂层阳极的失活机制及改进方法的研究进展[J].材料导报, 2023,37(z2):23-28. Yang R F, Jia B, Feng Q, et al. Research progress in deactivation mechanism and improvement methods of Titanium-coated anode[J]. Materials Reports, 2023,37(z2):23-28. [2] Carretero D S, Huang C P, Tzeng J H, et al. The recovery of sulfuric acid from spent piranha solution over a dimensionally stable anode (DSA) Ti-RuO2 electrode[J]. Journal of Hazardous Materials, 2021, 406:124658. [3] 曹炼,张居奎,林英姿,等. PbO2电极在电催化氧化领域中的应用[J].河南化工, 2024,41(2):4037-4048. Cao L, Zhang J K, Lin Y Z, et al. The application of PbO2 electrode in the field of electrocatalytic oxidation[J]. HeNan Chemical Industry, 2024,41(2):4037-4048. [4] 吴渴,朱米家,杨逸,等.电催化阳极材料在难降解有机废水处理中的研究进展[J].化学与生物工程, 2022,39(9):1-6. Wu K, Zhu M J, Yang Y, et al. Research progress of electrocatalytic anode materials in treatment of refractory organic wastewater[J]. Chemistry& Bioengineering, 2022,39(9):1-6. [5] Shao D, Li W J, Wang Z K, et al. Variable activity and selectivity for electrochemical oxidation wastewater treatment using a magnetically assembled electrode based on Ti/PbO2 and carbon nanotubes[J]. Separation and Purification Technology, 2022,301:122008. [6] Zhang X L, Shao D, Lyu W, et al. Design of magnetically assembled electrode (MAE) with Ti/PbO2and heterogeneous auxiliary electrodes (AEs):The functionality of AEs for efficient electrochemical oxidation[J]. Chemical Engineering Journal, 2020,395:125145. [7] Shao D, Zhang Y Y, Lyu W, et al. A modular functionalized anode for efficient electrochemical oxidation of wastewater:Inseparable synergy between OER anode and its magnetic auxiliary electrodes[J]. Journal of Hazardous Materials, 2020,390:122174. [8] Zhang Y Y, Zhang C P, Shao D, et al. Magnetically assembled electrodes based on Pt, RuO2-IrO2-TiO2and Sb-SnO2for electrochemical oxidation of wastewater featured by fluctuant Cl- concentration[J]. Journal of Hazardous Materials, 2022,421:126803. [9] Zhang X L, Shao D, Lyu W, et al. Utilizing discarded SiC heating rod to fabricate SiC/Sb-SnO2 anode for electrochemical oxidation of wastewater[J]. Chemical Engineering Journal, 2019,361:862-873. [10] Pei S Z, Shen C, Zhang C H, et al. Characterization of the interfacial joule heating effect in the electrochemical advanced oxidation process[J]. Environmental Science& Technology, 2019,53(8):4406-4415. [11] Zhang Z W, Cai W W, Hong R D, et al. Raman spectroscopy of multi-layer graphene epitaxially grown on 4H-SiC by joule heat decomposition[J]. Nanoscale Research Letters, 2018,13(1):197. [12] Zheng Y P, Yu D H, Xu W, et al. Robust FeCoP nanoparticles grown on a rGO-coated Ni foam as an efficient oxygen evolution catalyst for excellent alkaline and seawater electrolysis[J]. Dalton Transactions, 2023,52(11):3493-3500. [13] 张妍,车俊岭,贾艳敏.铁电材料催化抗菌研究进展[J].工程科学学报, 2024,46(9):1702-1712. Zhang Y, Che J L, Jia Y M, Research progress on ferroelectric catalytic materials for antimicrobials[J]. Chinese Journal of Engineering, 2024, 46(9):1702-1712. [14] 吴化平,令欢,张征,等.铁电材料光催化活性的研究进展[J].物理学报, 2017,66(16):305-315. Wu H P, Ling H, Zhang Z, et al. Research progress on photocatalytic activity of ferroelectric materials[J]. Acta Physica Sinica, 2017,66(16):305-315. [15] Zhu Y S, Qiu S, Tang W W, et al. Sustainable Fe3+ reduction by Fe3O4@tourmaline in fenton-like system[J]. Chemical Engineering Journal, 2022,437:135480. [16] Qi Y W, Cao H M, Pan W J, et al. The role of dissolved organic matter during per-and polyfluorinated substance (PFAS) adsorption, degradation, and plant uptake:a review[J]. Journal of Hazardous Materials, 2022,436:129139. [17] Sun S J, Li J X, Ding H, et al. Engineered tourmaline/g-C3N4composites for photocatalytic Fenton-like oxidation:synergy of spontaneous interface polarization and surface iron circulations induced by minerals[J]. Chemical Engineering Journal, 2023,460:141718. [18] 刘兆勋,李祥瑞,秦泽秀,等.超细电气石复合材料的制备及应用研究进展[J].化工新型材料, 2024,52(5):45-51. Liu Z X, Li X R, Qin Z X, et al. Progress in preparation and application of ultrafine tourmaline composites[J]. New Chemical Materials, 2024,52(5):45-51. [19] Shao D, Wang Y R, Li P, et al. Integrating natural tourmaline with energy conversion ability to magnetically assembled electrode:Boosted electrochemical oxidation wastewater treatment performance[J]. Journal of Environmental Chemical Engineering, 2024,12(1):111664. [20] Zhang F X, Shao D, Yang C A, et al. New magnetically assembled electrode consisting of magnetic activated carbon particles and Ti/Sb-SnO2for a more flexible and cost-effective electrochemical oxidation wastewater treatment[J]. Catalysts, 2022,13(1):7. [21] Yang C A, Zhao W P, Wang Z K, et al. New hierarchical Ti/SnO2-PbO2/CNT electrode:Enhanced electrochemical properties and improved electrochemical oxidation towards various real wastewaters[J]. Journal of Water Process Engineering, 2024,58:104889. [22] Li K, Chen C, Zhang H B, et al. Effects of phase structure of MnO2 and morphology of δ-MnO2 on toluene catalytic oxidation[J]. Applied Surface Science, 2019,496:143662. [23] 杨森,王雁,李乐琰,等.Ir对TiO2-RuO2涂层钛电极析氯性能的影响[J].电镀与涂饰, 2023,42(16):23-32. Yang S, Wang Y, Li L Y, Effect of iridium on chlorine evolution performance of titanium-ruthenium oxide electrode[J]. Electroplating& Finishing, 2023,42(16):23-32. [24] Zhao Z L, Yang S X, Wang S S, et al. Isolated rhodium atoms activate porous TiO2 for enhanced electrocatalytic conversion of nitrate to ammonia[J]. Advanced Science, 2024,2411705. [25] Shao D, Chu W, Li X L, et al. Electrochemical oxidation of guaiacol to increase its biodegradability or just remove COD in terms of anodes and electrolytes[J]. RSC advances, 2016,6(6):4858-4866. [26] Shao D, Wang Z K, Zhang C P, et al. Embedding wasted hairs in Ti/PbO2anode for efficient and sustainable electrochemical oxidation of organic wastewater[J]. Chinese Chemical Letters, 2022,33(3):1288-1292.