UV/OA/Fe（Ⅱ）/PS降解对乙酰氨基酚的有效性研究

doi:10.19965/j.cnki.iwt.2022-1312

摘要/Abstract

摘要：

研究了UV/草酸（OA）/Fe（Ⅱ）/过硫酸盐（PS）降解对乙酰氨基酚（AAP）的有效性。考察了PS初始浓度、AAP初始浓度、C（OA）/C〔Fe（Ⅱ）〕、pH和无机阴离子（HCO₃ ^-、NO₃ ^-、Cl^-和NO₂ ^-）对AAP降解效果的影响，并研究不同pH下产生自由基的贡献率。结果表明，OA对UV/Fe（Ⅱ）/PS降解AAP起促进作用，C（OA）/C〔Fe（Ⅱ）〕为4∶1、pH为3时，UV/OA/Fe（Ⅱ）/PS降解AAP效果最好。HCO₃ ^-对UV/OA/Fe（Ⅱ）/PS降解AAP起抑制作用，NO₃ ^-、Cl^-和NO₂ ^-对UV/OA/Fe（Ⅱ）/PS降解AAP起促进作用。UV/OA/Fe（Ⅱ）/PS体系中·OH是起主要作用的活性氧物种。UV/OA/Fe（Ⅱ）/PS降解AAP的主要产物有N-（3，4-二羟基苯基）乙酰胺、4-甲基邻苯二酚、对氨基苯酚、对苯二酚和1，2，4-苯三酚。

关键词: 过硫酸盐, 草酸, Fe（Ⅱ）, 自由基

Abstract:

The effectiveness of UV/oxalate （OA）/Fe（Ⅱ）/persulfate （PS） on the degradation of acetaminophen （AAP） was investigated. The effects of PS concentration，AAP concentration，concentration ratio of OA and Fe（Ⅱ），pH and inorganic anions（HCO₃ ^-，NO₃ ^-，Cl^- and NO₂ ^-）on the photodegradation of AAP were evaluated and the contribution rate of free radical generation at different pH in the system was studied. The results showed that the photodegradation of AAP with UV/Fe（Ⅱ）/PS was promoted by OA，and when the concentration ratio of OA and Fe（Ⅱ） was 4∶1 and the pH was 3，UV/OA/Fe（Ⅱ）/PS had the best effect on the degradation of acetaminophen. HCO₃ ^- had inhibitive effect on the degradation of AAP in the UV/OA/Fe（Ⅱ）/PS system，while NO₃ ^-，Cl^-and NO₂ ^- promoted the degradation of AAP in the UV/OA/Fe（Ⅱ）/PS system. The active specie of ·OH played a major oxidation role in UV/OA/ Fe（Ⅱ）/PS system. The main products of UV/OA/Fe（Ⅱ）/PS degradation of AAP were N-（3，4-dihydroxyphenyl） acetamide，4-methyl catechol，4-aminophenol，hydroquinone and 1，2，4-benzenetriol.

Key words: persulfate, oxalic acid, ferrous ion, free radical

中图分类号:

TQ426
X703

李建民, 张楠. UV/OA/Fe（Ⅱ）/PS降解对乙酰氨基酚的有效性研究[J]. 工业水处理, 2023, 43(12): 133-139.

Jianmin LI, Nan ZHANG. Study on the effectiveness of UV/OA/Fe（Ⅱ）/PS in degrading acetaminophen[J]. Industrial Water Treatment, 2023, 43(12): 133-139.

https://www.iwt.cn/CN/Y2023/V43/I12/133

图/表 8

图1 OA对UV/PS/Fe（Ⅱ）降解AAP的有效性

Fig.1 Effect of OA on degradation of AAP by UV/PS/Fe（Ⅱ）

图2 不同PS浓度对UV/OA/Fe（Ⅱ）/PS体系降解AAP的影响

Fig.2 Effects of PS concentration on degradation of AAP in water by UV/OA/Fe（Ⅱ）/PS

图3 不同AAP初始浓度对UV/OA/Fe（Ⅱ）/PS体系降解AAP的影响

Fig.3 Effects of AAP concentration on degradation of AAP in water by UV/OA/Fe（Ⅱ）/PS

图4 C（OA）/C〔Fe（Ⅱ）〕对UV/OA/Fe（Ⅱ）/PS降解AAP的影响

Fig.4 Effects of C（OA）/C〔Fe（Ⅱ）〕 on degradation of AAP by UV/OA/ Fe（Ⅱ）/PS

图5 不同pH对UV/OA/Fe（Ⅱ）/PS体系降解AAP的影响

Fig.5 Effects of pH on degradation of AAP in water by UV/OA/ Fe（Ⅱ）/PS

图6 不同猝灭剂对UV/OA/Fe（Ⅱ）/PS降解AAP的影响

Fig.6 Effect of quencher under UV/OA/Fe（Ⅱ）/PS degradation of AAP

图7 无机阴离子对UV/OA/ Fe（Ⅱ）/PS降解AAP的影响

Fig.7 Effects of inorganic salt on degradation of AAP by UV/OA/ Fe（Ⅱ）/PS

图8 AAP光解途径分析

Fig.8 Proposed transformation pathways of photodegradation of AAP

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