Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals
Advanced oxidation processes (AOPs) demonstrate great micropollutant degradation efficiency. In this study, CuFe<sub>2</sub>O<sub>4</sub> was successfully used to activate peracetic acid (PAA) to remove Rhodamine B. Acetyl(per)oxyl radicals were the dominant species in this n...
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MDPI AG
2022-09-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/19/6385 |
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| author | Chengzhi Yu Libin Zheng Yongyuan Hong Jiabin Chen Feng Gao Yalei Zhang Xuefei Zhou Libin Yang |
| author_facet | Chengzhi Yu Libin Zheng Yongyuan Hong Jiabin Chen Feng Gao Yalei Zhang Xuefei Zhou Libin Yang |
| author_sort | Chengzhi Yu |
| collection | DOAJ |
| description | Advanced oxidation processes (AOPs) demonstrate great micropollutant degradation efficiency. In this study, CuFe<sub>2</sub>O<sub>4</sub> was successfully used to activate peracetic acid (PAA) to remove Rhodamine B. Acetyl(per)oxyl radicals were the dominant species in this novel system. The addition of 2,4-hexadiene (2,4-HD) and Methanol (MeOH) significantly inhibited the degradation efficiency of Rhodamine B. The ≡Cu<sup>2+</sup>/≡Cu<sup>+</sup> redox cycle dominated PAA activation, thereby producing organic radicals (R-O˙) including CH<sub>3</sub>C(O)O˙ and CH<sub>3</sub>C(O)OO˙, which accounted for the degradation of Rhodamine B. Increasing either the concentration of CuFe<sub>2</sub>O<sub>4</sub> (0–100 mg/L) or PAA (10–100 mg/L) promoted the removal efficiency of this potent system. In addition, weakly acid to weakly alkali pH conditions (6–8) were suitable for pollutant removal. The addition of Humid acid (HA), HCO<sub>3</sub><sup>−</sup>, and a small amount of Cl<sup>−</sup> (10–100 mmol·L<sup>−1</sup>) slightly inhibited the degradation of Rhodamine B. However, degradation was accelerated by the inclusion of high concentrations (200 mmol·L<sup>−1</sup>) of Cl<sup>−</sup>. After four iterations of catalyst recycling, the degradation efficiency remained stable and no additional functional group characteristic peaks were observed. Taking into consideration the reaction conditions, interfering substances, system stability, and pollutant-removal efficiency, the CuFe<sub>2</sub>O<sub>4</sub>/PAA system demonstrated great potential for the degradation of Rhodamine B. |
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| spelling | doaj.art-af13fba717694bc398b69b68b8032f4d2023-11-23T21:10:30ZengMDPI AGMolecules1420-30492022-09-012719638510.3390/molecules27196385Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl RadicalsChengzhi Yu0Libin Zheng1Yongyuan Hong2Jiabin Chen3Feng Gao4Yalei Zhang5Xuefei Zhou6Libin Yang7State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaState Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaAdvanced oxidation processes (AOPs) demonstrate great micropollutant degradation efficiency. In this study, CuFe<sub>2</sub>O<sub>4</sub> was successfully used to activate peracetic acid (PAA) to remove Rhodamine B. Acetyl(per)oxyl radicals were the dominant species in this novel system. The addition of 2,4-hexadiene (2,4-HD) and Methanol (MeOH) significantly inhibited the degradation efficiency of Rhodamine B. The ≡Cu<sup>2+</sup>/≡Cu<sup>+</sup> redox cycle dominated PAA activation, thereby producing organic radicals (R-O˙) including CH<sub>3</sub>C(O)O˙ and CH<sub>3</sub>C(O)OO˙, which accounted for the degradation of Rhodamine B. Increasing either the concentration of CuFe<sub>2</sub>O<sub>4</sub> (0–100 mg/L) or PAA (10–100 mg/L) promoted the removal efficiency of this potent system. In addition, weakly acid to weakly alkali pH conditions (6–8) were suitable for pollutant removal. The addition of Humid acid (HA), HCO<sub>3</sub><sup>−</sup>, and a small amount of Cl<sup>−</sup> (10–100 mmol·L<sup>−1</sup>) slightly inhibited the degradation of Rhodamine B. However, degradation was accelerated by the inclusion of high concentrations (200 mmol·L<sup>−1</sup>) of Cl<sup>−</sup>. After four iterations of catalyst recycling, the degradation efficiency remained stable and no additional functional group characteristic peaks were observed. Taking into consideration the reaction conditions, interfering substances, system stability, and pollutant-removal efficiency, the CuFe<sub>2</sub>O<sub>4</sub>/PAA system demonstrated great potential for the degradation of Rhodamine B.https://www.mdpi.com/1420-3049/27/19/6385peracetic acid (PAA)rhodamine Bcopper ferrite (CuFe<sub>2</sub>O<sub>4</sub>)organic radicals (R-O˙) |
| spellingShingle | Chengzhi Yu Libin Zheng Yongyuan Hong Jiabin Chen Feng Gao Yalei Zhang Xuefei Zhou Libin Yang Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals Molecules peracetic acid (PAA) rhodamine B copper ferrite (CuFe<sub>2</sub>O<sub>4</sub>) organic radicals (R-O˙) |
| title | Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals |
| title_full | Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals |
| title_fullStr | Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals |
| title_full_unstemmed | Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals |
| title_short | Activation of Peracetic Acid with CuFe<sub>2</sub>O<sub>4</sub> for Rhodamine B Degradation: Activation by Cu and the Contribution of Acetylperoxyl Radicals |
| title_sort | activation of peracetic acid with cufe sub 2 sub o sub 4 sub for rhodamine b degradation activation by cu and the contribution of acetylperoxyl radicals |
| topic | peracetic acid (PAA) rhodamine B copper ferrite (CuFe<sub>2</sub>O<sub>4</sub>) organic radicals (R-O˙) |
| url | https://www.mdpi.com/1420-3049/27/19/6385 |
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