Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 100000, Vietnam.
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.
Int J Environ Res Public Health. 2018 Nov 25;15(12):2637. doi: 10.3390/ijerph15122637.
The combination of a low-pressure mercury lamp and chlorine (UV/chlorine) was applied as an emerging advanced oxidation process (AOP), to examine paracetamol (PRC) degradation under different operational conditions. The results indicated that the UV/chlorine process exhibited a much faster PRC removal than the UV/H₂O₂ process or chlorination alone because of the great contribution of highly reactive species (OH, Cl, and ClO). The PRC degradation rate constant () was accurately determined by pseudo-first-order kinetics. The values were strongly affected by the operational conditions, such as chlorine dosage, solution pH, UV intensity, and coexisting natural organic matter. Response surface methodology was used for the optimization of four independent variables (NaOCl, UV, pH, and DOM). A mathematical model was established to predict and optimize the operational conditions for PRC removal in the UV/chlorine process. The main transformation products (twenty compound structures) were detected by liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS).
采用低压汞灯和氯气（UV/氯气）的组合作为一种新兴的高级氧化工艺（AOP），在不同操作条件下考察扑热息痛（PRC）的降解情况。结果表明，由于高反应性物质（OH、Cl 和 ClO）的巨大贡献，UV/氯气工艺比 UV/H₂O₂工艺或单独氯化具有更快的 PRC 去除率。通过拟一级动力学准确确定了 PRC 降解速率常数（k）。的值受操作条件的强烈影响，如氯剂量、溶液 pH 值、UV 强度和共存天然有机物。响应面法用于优化四个独立变量（次氯酸钠、UV、pH 和 DOM）。建立了一个数学模型来预测和优化 UV/氯气工艺中 PRC 去除的操作条件。通过液相色谱-高分辨率质谱（LC-HRMS）检测到主要转化产物（二十种化合物结构）。
