酮洛芬在水环境中与硝酸盐的臭氧化反应：动力学、途径及毒性
Ozonation of ketoprofen with nitrate in aquatic environments: kinetics, pathways, and toxicity.
作者信息
Zeng Yongqin, Lin Xiaoxuan, Li Fuhua, Chen Ping, Kong Qingqing, Liu Guoguang, Lv Wenying
机构信息
School of Environmental Science and Engineering, Guangdong University of Technology No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District Guangzhou 510006 China
School of Environment and Chemical Engineering, Foshan University Guangdong 528000 China.
出版信息
RSC Adv. 2018 Mar 16;8(19):10541-10548. doi: 10.1039/c7ra12894k. eCollection 2018 Mar 13.
In this study, nitrate ion (NO ) was found to collaborate with ozone thereby accelerating the degradation of ketoprofen. NO was discovered to induce the generation of hydroxyl radicals (·OH), which was crucial to the decomposition of PPCPs in wastewater treatment plants. Kinetic studies on the decomposition of ketoprofen were investigated under different concentrations of NO . The impact mechanisms and degradation by-products were experimentally determined. The results revealed that all reactions fitted the pseudo-first-order kinetic model well. The presence of NO had the capacity to accelerate the ozonation of ketoprofen. The reaction by-products were evaluated by UPLC-Q-TOF-MS, and a total of five intermediates generated the ozonation of ketoprofen were assessed. The transformation pathways were concluded to be hydroxylation, nitration, and debenzophenone and ketonized reactions. Additionally, the toxicity of the by-products was evaluated by employing and .
在本研究中，发现硝酸根离子（NO ）与臭氧协同作用，从而加速酮洛芬的降解。发现NO 能诱导羟基自由基（·OH）的产生，这对污水处理厂中持久性有机污染物的分解至关重要。在不同浓度的NO 条件下对酮洛芬的分解进行了动力学研究。通过实验确定了影响机制和降解副产物。结果表明，所有反应均能很好地拟合伪一级动力学模型。NO 的存在能够加速酮洛芬的臭氧化反应。通过超高效液相色谱-四极杆-飞行时间质谱联用仪（UPLC-Q-TOF-MS）对反应副产物进行了评估，并对酮洛芬臭氧化反应产生的总共五种中间体进行了评估。得出的转化途径为羟基化、硝化、脱二苯甲酮和酮化反应。此外，通过采用 和 对副产物的毒性进行了评估。
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