Homogeneous Cu²⁺-mediated activation of H₂O₂ has been widely applied for the removal of organic contaminants, but fairly high dosage of Cu²⁺ is generally required and may cause secondary pollution. In the present study, minute Cu²⁺ (2.5 μM) catalyzed H₂O₂ exhibited excellent efficiency in degradation of organic pollutants with the assistant of naturally occurring level HCO₃⁻ (1 mM). In a typical case, acetaminophen (ACE) was completely eliminated within 10 min which followed the pseudo-first-order kinetics. Singlet oxygen and superoxide radical rather than traditionally identified hydroxyl radical were the predominant reactive oxygen species (ROS) responsible for ACE degradation. Meanwhile, Cu³⁺ was deduced through Cu⁺ and p-hydroxybenzoic acid formation analysis. CuCO₃(aq) was the main complex with high reactivity for the activation of H₂O₂ to form ROS and Cu³⁺. The removal efficiency of ACE depended on the operating parameters, such as Cu²⁺, HCO₃⁻ and H₂O₂ dosage, solution initial pH. The presence of Cl⁻, HPO₄²⁻, humic acid were found to retard ACE removal while other anions such as SO₄²⁻ and NO₃⁻ had no obvious effect. ACE exhibited lower degradation efficiency in real water matrices than that in ultra-pure water. Nevertheless, 58–100% of ACE was removed from domestic wastewater, lake water and tap water within 60 min. Moreover, eight intermediate products were identified and the possible degradation pathways of ACE were proposed. Additionally, other typical organic pollutants including bisphenol A, norfloxacin, lomefloxacin hydrochloride and sulfadiazine, exhibited great removal efficiency in the Cu²⁺/H₂O₂/HCO₃⁻ system.

均相Cu ²⁺介导的H ₂ O ₂活化已广泛应用于有机污染物的去除，但通常需要相当高的Cu ²⁺剂量并且可能造成二次污染。在本研究中，微小的 Cu ²⁺ (2.5 μM) 催化的 H ₂ O ₂在天然存在的 HCO ₃ ^-水平的辅助下，在降解有机污染物方面表现出优异的效率。(1 毫米)。在典型情况下，对乙酰氨基酚 (ACE) 在 10 分钟内完全消除，遵循伪一级动力学。单线态氧和超氧自由基而不是传统上确定的羟基自由基是导致 ACE 降解的主要活性氧 (ROS)。同时，通过Cu ⁺和对羟基苯甲酸形成分析推导出Cu ³⁺。CuCO ₃ (aq) 是主要的配合物，对于激活 H ₂ O ₂形成 ROS 和 Cu ³⁺具有高反应性。ACE的去除效率取决于操作参数，如Cu ²⁺、HCO ₃ ^-和H₂ O ₂用量，溶液初始pH值。发现Cl ^-、HPO ₄ ^2-、腐殖酸的存在会延缓ACE 的去除，而其他阴离子如SO ₄ ^2-和NO ₃ ^-没有明显影响。ACE 在实际水基质中的降解效率低于在超纯水中的降解效率。尽管如此，58-100% 的 ACE 在 60 分钟内从生活废水、湖水和自来水中去除。此外，还鉴定了 8 种中间产物，并提出了 ACE 可能的降解途径。此外，其他典型有机污染物包括双酚 A、诺氟沙星、盐酸洛美沙星和磺胺嘧啶，在 Cu 中表现出很好的去除效率。²⁺ /H ₂ O ₂ /HCO ₃ ^-系统。