ABSTRACT

Organic micropollutants (OMPs) have been widely detected in the aqueous environment and their effect on the environment and human health has been studied. The removal of OMPs from effluents of a conventional urban wastewater treatment plant by ozonation as well as photo-enhancement of ozonation using UVA-LED panels and photolysis in the presence and absence of hydrogen peroxide was investigated. In a novel semi-technical reactor municipal wastewater was treated for 2 hours, using ozone – O₃ (3 mg O₃·L⁻¹) and in combination with UVA-LED – O₃/UV (peak wavelength 371 nm, 0.78 W·m⁻2) and in combination with UVA-LED and hydrogen peroxide – O₃/UV/H₂O₂ (20 mg H₂O₂·L⁻¹). The highest removal fractions for all OMPs were obtained with O₃/UV/H₂O₂ (candesartan: 93.3%, irbesartan: 79.9%, 1 H-benzotriazole: 42.2%, hydrochlorothiazide: 40.8%, 4-/5-methyl-1 H-benzotriazole: 39%, and metoprolol: 24%) and with O₃ (diclofenac: 87.2%, carbamazepine: 76.4%, and sulfamethoxazole: 53.5%). As a conclusion of the different AOP combinations of this study, UV photo-enhancement of ozonation has much more beneficial effects on OMP removal when it is combined with an additional H₂O₂ dosing.

摘要

有机微污染物（OMPs）已在水环境中广泛检测到，并研究了它们对环境和人类健康的影响。研究了通过臭氧化从传统城市污水处理厂的流出物中去除 OMP，以及使用 UVA-LED 面板和光解在存在和不存在过氧化氢的情况下光增强臭氧化。在新型半技术反应器中，城市废水处理 2 小时，使用臭氧 – O ₃ (3 mg O ₃ ·L ^-1 ) 并结合 UVA-LED – O ₃ /UV（峰值波长 371 nm，0.78 W ·m ⁻ 2) 并结合 UVA-LED 和过氧化氢 – O ₃ /UV/H ₂ O₂ (20mg H ₂ O ₂ ·L ^-1 )。_{使用 O 3} /UV/H ₂ O ₂获得所有 OMP 的最高去除率（坎地沙坦：93.3%，厄贝沙坦：79.9%，1 H-苯并三唑：42.2%，氢氯噻嗪：40.8%，4-/5-甲基- 1 H-苯并三唑：39%，美托洛尔：24%）和 O ₃（双氯芬酸：87.2%，卡马西平：76.4%，磺胺甲恶唑：53.5%）。_{作为本研究的不同 AOP 组合的结论，当与额外的 H 2} O ₂剂量相结合时，臭氧的紫外光增强对 OMP 去除具有更有益的影响。