Advanced oxidation techniques based on H₂O₂ activation have recently gained lots of concern for dye wastewater treatment. A green activation approach, HCO₃⁻-H₂O₂ system, was employed for dye wastewater treatment in this study, and Acid Orange II (AO7) was selected as the target dye. AO7 removal performance and decomposition mechanisms were systematically explored. Almost all of the AO7 was removed within 30 min’s processing. Relatively higher reaction kinetic rate constant was obtained at a relatively lower AO7 initial concentration, appropriately larger H₂O_2, and HCO₃⁻ dosages, and weak alkaline conditions. O₂⁻ was the main active substances for AO7 decomposition, and OH and ¹O₂ also participated in the AO7 decomposition as analyzed by different scavenger tests. The attacks of these active substances to AO7 molecules resulted in the destruction of the benzene ring, naphthalene ring, and the azo groups. Finally, the removal of chemical oxygen demand reached 72% after 60 min’s oxidation treatment. The main degradation intermediates contained salicylic acid, phenol, 1,4-benzenediol, and dibutyl phthalate; and the possible decomposition pathways of AO7 in this system were proposed. Furthermore, the removal performances of different dyes in this system were all satisfactory.

最近，基于H ₂ O ₂活化的先进氧化技术已引起染料废水处理的广泛关注。本研究采用绿色活化方法HCO ₃ ^-- H ₂ O ₂系统处理染料废水，并选择酸性橙II（AO7）作为目标染料。系统地探讨了AO7的去除性能和分解机理。在30分钟的处理过程中，几乎所有AO7都被清除了。在较低的AO7初始浓度，适当较大的H ₂ O ₂和HCO _3-下，可获得相对较高的反应动力学速率常数^。剂量和弱碱性条件。ö ₂ ^-是为AO7分解的主要活性物质，和OH和¹ ö ₂也参与了分解AO7通过不同清道夫测试作为分析。这些活性物质对AO7分子的攻击导致苯环，萘环和偶氮基团的破坏。最终，经过60分钟的氧化处理后，化学需氧量的去除率达到72％。主要的降解中间体包括水杨酸，苯酚，1，4-苯二醇和邻苯二甲酸二丁酯。并提出了AO7在该系统中可能的分解途径。此外，该体系中不同染料的去除性能均令人满意。