微波增强诺氟沙星光解：动力学、基质效应和降解途径。
Microwave-Enhanced Photolysis of Norfloxacin: Kinetics, Matrix Effects, and Degradation Pathways.
机构信息
School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361024, China.
Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX 77843, USA.
出版信息
Int J Environ Res Public Health. 2017 Dec 14;14(12):1564. doi: 10.3390/ijerph14121564.
Degradation of norfloxacin (NOR) was studied using a combination of microwave and UV irradiation methods (MW/UV process). Remarkable synergistic effect was found between MW and UV light. The removal rate with the MW/UV process was much faster than that with UV light irradiation only. Degradation of NOR followed second-order kinetics and ~72% of NOR could be removed in the first 5 min of MW/UV reaction. Influence of inorganic ions (cations (K⁺, Mg, Ca, Cu) and anions (Cl, SO₄, NO₃, CO₃)), humic acid (HA) and surfactants (cation, anion, and non-ionic) on the degradation of NOR by the MW/UV process was investigated. Among the ions, Cu and NO₃ ions inhibited the degradation of NOR. The presence of HA and surfactants in water showed a slight inhibition on the NOR removal. Furthermore, the NOR degradation in the MW/UV process was primarily caused by the ·OH-photosensitization steps. Seven intermediates formed by the oxidation of NOR were identified and three reaction pathways were proposed. Removals of NOR in tap water (TW), synthetic wastewater (WW), river water (RW), and seawater (SW) were also studied, which demonstrated that the MW/UV process was an effective oxidation technology for degrading fluoroquinolone antibiotics in different water matrices.
采用微波和紫外辐射联用方法（MW/UV 工艺）研究了诺氟沙星（NOR）的降解。发现微波和紫外光之间存在显著的协同效应。MW/UV 工艺的去除率比单独使用紫外光照射快得多。NOR 的降解符合二级动力学，在 MW/UV 反应的前 5 分钟内，NOR 的去除率约为 72%。考察了无机离子（阳离子（K⁺、Mg、Ca、Cu）和阴离子（Cl、SO₄、NO₃、CO₃））、腐殖酸（HA）和表面活性剂（阳离子、阴离子和非离子）对 MW/UV 工艺降解 NOR 的影响。在这些离子中，Cu 和 NO₃离子抑制 NOR 的降解。水中 HA 和表面活性剂的存在对 NOR 的去除略有抑制。此外，MW/UV 工艺中 NOR 的降解主要是由·OH 敏化步骤引起的。鉴定出 NOR 氧化生成的 7 种中间产物，并提出了 3 条反应途径。还研究了 MW/UV 工艺在自来水（TW）、合成废水（WW）、河水（RW）和海水中（SW）对 NOR 的去除，结果表明 MW/UV 工艺是一种有效降解不同水基质中氟喹诺酮类抗生素的氧化技术。
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