School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), Tsinghua University, Beijing, 100084, China.
Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Science, Beijing, 100097, China.
Environ Sci Pollut Res Int. 2023 Feb;30(7):19439-19449. doi: 10.1007/s11356-022-23473-z. Epub 2022 Oct 14.
Phenacetin (PNT) is one of the most frequently detected nonsteroidal anti-inflammatory drugs in the water ecosystems, which poses a potential risk to environmental aquatic organisms. Acid-washed zero-valent aluminum (ZVAl) as a highly efficient activator for persulfate (PS) process was investigated to degrade PNT from the aqueous solution. The results indicated that acid-washed pretreatment for ZVAl could efficiently increase the degradation efficiency of PNT in the PS treatment. The degradation efficiency of PNT (50 μM) was up to 90% in 4 hours with the addition of 0.2 g/L acid-washed ZVAl and 8 mM PS at pH 6.8 and 25 °C. The PNT degradation followed pseudo-first order kinetics in the present system. High activator dosage, PS concentration, and reaction temperature could enhance the PNT degradation. The presence of inorganic anions (i.e., NO, HCO) and humic acid (HA) showed inhibitory effects on the PNT degradation. The reuse results illustrated the acid-washed ZVAl material would have continuous and efficient activation performance for PS to degrade the PNT. Radical scavenger experiments and electron paramagnetic resonance indicated that both SO and •OH were major reactive species during the PNT degradation. The possible degradation pathways of PNT mainly included the break of C-N and C-O bonds and further oxidation.
非那西汀（PNT）是水生态系统中检测到的最常见的非甾体抗炎药之一，对环境水生生物构成潜在风险。酸处理零价铝（ZVAl）作为过硫酸盐（PS）过程的高效活化剂，用于降解水溶液中的 PNT。结果表明，ZVAl 的酸处理预处理可以有效地提高 PS 处理中 PNT 的降解效率。在 pH 值为 6.8 和 25°C 时，添加 0.2 g/L 酸处理 ZVAl 和 8 mM PS，可将 50 μM 的 PNT 在 4 小时内降解至 90%。在本体系中，PNT 的降解遵循假一级动力学。高活化剂用量、PS 浓度和反应温度可以提高 PNT 的降解效率。无机阴离子（如 NO、HCO）和腐殖酸（HA）的存在对 PNT 的降解表现出抑制作用。重复使用结果表明，酸处理的 ZVAl 材料对 PS 具有连续高效的活化性能，可用于降解 PNT。自由基清除实验和电子顺磁共振表明，在 PNT 降解过程中，SO 和 •OH 是主要的活性物质。PNT 的可能降解途径主要包括 C-N 和 C-O 键的断裂和进一步氧化。
