School of Environmental and Safety Engineering, Changzhou University, No. 1, Gehu Road, Changzhou 213164, China E-mail:
College of Arts and Sciences, Indiana University Bloomington, Indiana 47406, USA.
Water Sci Technol. 2017 Jun;75(12):2935-2951. doi: 10.2166/wst.2017.149.
The removal of ibuprofen (IBP) in aqueous solution using UV/HO process was evaluated. The response surface methodology (RSM) and Box-Behnken design were employed to investigate the effects of process parameters on IBP removal, including the initial IBP concentration, HO dosage, UV light intensity, and initial pH value of solution. The RSM model developed herein fits well with the experiments, and provides a good insight into the OH radical irritated degradation mechanisms and kinetics. High resolution accurate mass spectrometry coupled with liquid chromatography was used to identify the degradation intermediates. A total of 23 degradation products were identified, including mono-hydroxylated products and dihydroxylated products. A series of OH radical-initiated reactions, including hydroxylation, dihydroxylation, decarboxylation, demethylation, ring break, lead to the final mineralization of IBP to CO and HO. UV/HO technology could be a promising technology for IBP removal in aqueous solution.
采用 UV/HO 工艺去除水溶液中的布洛芬（IBP）。利用响应面法（RSM）和 Box-Behnken 设计研究了工艺参数对 IBP 去除的影响，包括初始 IBP 浓度、HO 剂量、UV 光强度和溶液初始 pH 值。本文建立的 RSM 模型与实验拟合良好，为 OH 自由基刺激降解机制和动力学提供了很好的见解。采用高分辨率精确质量质谱联用液相色谱法鉴定了降解中间体。共鉴定出 23 种降解产物，包括单羟基化产物和二羟基化产物。一系列 OH 自由基引发的反应，包括羟化、二羟化、脱羧、去甲基化、环断裂，最终将 IBP 矿化为 CO 和 HO。UV/HO 技术有望成为去除水溶液中 IBP 的一种有前途的技术。
