CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Environ Sci Pollut Res Int. 2020 Jun;27(17):21542-21551. doi: 10.1007/s11356-020-08613-7. Epub 2020 Apr 11.
Naproxen, a widely used nonsteroidal anti-inflammatory drug, has been detected in many environmental matrixes and is regarded as an emerging pollutant. Sulfate radical (SO·) -based advanced oxidation processes have attracted wide attention due to their high efficiency and applicability in the removal of emerging contaminants. In this study, CuFeO was used as an efficient catalyst to activate peroxymonosulfate to oxidize naproxen. The results suggested that 92.3% of naproxen was degraded and 50.3% total organic carbon was removed in 60 min in the presence of 0.3 g·L CuFeO and 2 mM peroxymonosulfate. This degradation system showed strong adaptability in a wide pH range from 4.0 to 10.0. Free radical scavenger experiments and electron spin resonance analysis indicated that O, ·OH, and SO· are the main active species. Finally, the potential degradation pathways of naproxen were proposed by detecting and analyzing the degradation products with ultra-high-performance liquid chromatography combined with mass spectrometry. The results of this study suggest that the CuFeO-activated peroxymonosulfate system is a promising technology for the removal of naproxen from natural water.
萘普生是一种被广泛应用的非甾体类抗炎药，已在多种环境基质中被检测到，被认为是一种新兴污染物。基于硫酸根自由基（SO·）的高级氧化技术因其在去除新兴污染物方面的高效性和适用性而受到广泛关注。在本研究中，CuFeO 被用作高效催化剂，以活化过一硫酸盐氧化萘普生。结果表明，在 0.3 g·L CuFeO 和 2 mM 过一硫酸盐的存在下，萘普生在 60 min 内降解了 92.3%，总有机碳去除了 50.3%。该降解体系在 pH 值为 4.0 到 10.0 的较宽范围内具有很强的适应性。自由基清除实验和电子顺磁共振分析表明，O、·OH 和 SO·是主要的活性物质。最后，通过用超高效液相色谱-质谱联用检测和分析降解产物，提出了萘普生的潜在降解途径。本研究表明，CuFeO 活化过一硫酸盐体系是一种从天然水中去除萘普生的有前途的技术。
