Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid
The treatment of acid wastewater to remove organic matter in acid wastewater and recycle valuable resources has great significance. However, the classical advanced oxidation process (AOPs), such as the Fenton reaction, encountered a bottleneck under the conditions of strong acid. Herein, making use...
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/24/4410 |
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| author | Tianming Wu Jing Cui Changjiang Wang Gong Zhang Limin Li Yue Qu Yusheng Niu |
| author_facet | Tianming Wu Jing Cui Changjiang Wang Gong Zhang Limin Li Yue Qu Yusheng Niu |
| author_sort | Tianming Wu |
| collection | DOAJ |
| description | The treatment of acid wastewater to remove organic matter in acid wastewater and recycle valuable resources has great significance. However, the classical advanced oxidation process (AOPs), such as the Fenton reaction, encountered a bottleneck under the conditions of strong acid. Herein, making use of the oxidation properties of CeAY (CeO<sub>2</sub>@acid clay), we built an AOPs reaction system without H<sub>2</sub>O<sub>2</sub> under a strong acid condition that can realize the transformation of organic matter in industrial wastewater. The X-ray photoelectron spectroscopy (XPS) proved that the CeAY based on Ce<sup>3+</sup> as an active center has abundant oxygen vacancies, which can catalyze O<sub>2</sub> to produce reactive oxygen species (ROS). Based on the electron spin-resonance spectroscopy spectrum and radical trapping experiments, the production of •O<sub>2</sub><sup>–</sup> and •OH can be determined, which are the essential factors of the degradation of organic compounds. In the system of pH = 1.0, when 1 mg CeAY is added to 10 mL of wastewater, the degradation efficiency of an aniline solution with a 5 mg/L effluent concentration is 100%, and that of a benzoic acid solution with a 100 mg/L effluent concentration is 50% after 10 min of reaction. This work may provide novel insights into the removal of organic pollutants in a strong acid water matrix. |
| first_indexed | 2024-03-09T16:01:19Z |
| format | Article |
| id | doaj.art-6c862d474c70440087e190dfaca3da6a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T16:01:19Z |
| publishDate | 2022-12-01 |
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| series | Nanomaterials |
| spelling | doaj.art-6c862d474c70440087e190dfaca3da6a2023-11-24T17:03:54ZengMDPI AGNanomaterials2079-49912022-12-011224441010.3390/nano12244410Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong AcidTianming Wu0Jing Cui1Changjiang Wang2Gong Zhang3Limin Li4Yue Qu5Yusheng Niu6Institute of Biomedical Engineering, College of Life Sciences, Qingdao University, Qingdao 266071, ChinaCollege of Resources and Environment, Shandong Agricultural University, Taian 271018, ChinaShandong Zhengyuan Geological Resource Exploration Co. Ltd., China Metallurgical Geology Bureau, Weifang 261200, ChinaCenter for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, ChinaInstitute of Biomedical Engineering, College of Life Sciences, Qingdao University, Qingdao 266071, ChinaInstitute of Biomedical Engineering, College of Life Sciences, Qingdao University, Qingdao 266071, ChinaInstitute of Biomedical Engineering, College of Life Sciences, Qingdao University, Qingdao 266071, ChinaThe treatment of acid wastewater to remove organic matter in acid wastewater and recycle valuable resources has great significance. However, the classical advanced oxidation process (AOPs), such as the Fenton reaction, encountered a bottleneck under the conditions of strong acid. Herein, making use of the oxidation properties of CeAY (CeO<sub>2</sub>@acid clay), we built an AOPs reaction system without H<sub>2</sub>O<sub>2</sub> under a strong acid condition that can realize the transformation of organic matter in industrial wastewater. The X-ray photoelectron spectroscopy (XPS) proved that the CeAY based on Ce<sup>3+</sup> as an active center has abundant oxygen vacancies, which can catalyze O<sub>2</sub> to produce reactive oxygen species (ROS). Based on the electron spin-resonance spectroscopy spectrum and radical trapping experiments, the production of •O<sub>2</sub><sup>–</sup> and •OH can be determined, which are the essential factors of the degradation of organic compounds. In the system of pH = 1.0, when 1 mg CeAY is added to 10 mL of wastewater, the degradation efficiency of an aniline solution with a 5 mg/L effluent concentration is 100%, and that of a benzoic acid solution with a 100 mg/L effluent concentration is 50% after 10 min of reaction. This work may provide novel insights into the removal of organic pollutants in a strong acid water matrix.https://www.mdpi.com/2079-4991/12/24/4410advanced oxidation processstrong acid wastewaterreactive oxygenorganic compoundselectron transfer |
| spellingShingle | Tianming Wu Jing Cui Changjiang Wang Gong Zhang Limin Li Yue Qu Yusheng Niu Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid Nanomaterials advanced oxidation process strong acid wastewater reactive oxygen organic compounds electron transfer |
| title | Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid |
| title_full | Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid |
| title_fullStr | Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid |
| title_full_unstemmed | Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid |
| title_short | Oxygen Vacancy-Mediated Activates Oxygen to Produce Reactive Oxygen Species (ROS) on Ce-Modified Activated Clay for Degradation of Organic Compounds without Hydrogen Peroxide in Strong Acid |
| title_sort | oxygen vacancy mediated activates oxygen to produce reactive oxygen species ros on ce modified activated clay for degradation of organic compounds without hydrogen peroxide in strong acid |
| topic | advanced oxidation process strong acid wastewater reactive oxygen organic compounds electron transfer |
| url | https://www.mdpi.com/2079-4991/12/24/4410 |
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