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Freezing-enhanced degradation of naproxen by bicarbonate activated hydrogen peroxide: Peformance and mechanisms

文献类型： 外文期刊

作者： Zhang, Genbao 1 ; Zhao, Yunze 1 ; Guo, Yihang 1 ; Li, Ming 3 ; Meng, Qingling 1 ; Yuan, Baoling 1 ; Xue, Honghai 1 ; Wang, Hongliang 2 ;

作者机构： 1.Jilin Jianzhu Univ, Key Lab Songliao Aquat Environm, Minist Educ, Changchun 130118, Peoples R China

2.Chinese Res Inst Environm Sci, State Environm Protect Key Lab Ecol Effect & Risk, Beijing 100012, Peoples R China

3.Jilin Acad Agr Sci, Northeast Agr Res Ctr China, Changchun 130033, Peoples R China

关键词： Freezing; Bicarbonate activated peroxide; Degradation; Naproxen; Freeze-concentration effect

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 514 卷

页码：

收录情况： SCI

摘要： Considering the harmful effect of non-steroidal anti-inflammatory drugs on aquatic environments, this study developed a freezing-enhanced bicarbonate activated hydrogen peroxide (BAP) method for the degradation of naproxen (NPX) as a representative. The results showed that NPX can be degraded by 98.82 % in 150 min; while it was removed only by 2.27 % in unfrozen aqueous solution. Freeze-concentration effect was the major reason for the freezing-enhanced degradation of NPX as indicated by confocal raman microscope. And pH decrease caused by the charge imbalance of solutes between bulk ice and quasi-liquid layer during freezing was another reason. Temperature-dependent experiments showed that temperatures of -10 degrees C and -20 degrees C were favorable for the NPX degradation, whereas lower temperatures (-40 degrees C and -30 degrees C) were detrimental to it. Alkaline conditions (pH 8.13) were favorable for NPX degradation, with either an increase or decrease in pH slowing down the degradation. & sdot;OH was the dominant reactive species during the degradation of NPX. Eight transformation products of NPX were identified, with the main degradation pathways involving decarboxylation, hydroxylation, and ring-opening. Toxicity analysis indicated that part of the degradation products were less toxic than NPX. The NPX degradation efficiency was slowed down under natural freezing condition compared to that under continuous freezing process. The freezing/BAP system was applicable to the degradation of acetaminophen and aspirin as well. This study provided a new idea for removing drugs from the cold aquatic environment, and also deepened the understanding on the role of freezing in pollutant transformation.

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