The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film
Exceeding the permitted manganese (Mn<sup>2+</sup>) and ammonium (NH<sub>4</sub><sup>+</sup>-N) levels is a frequent seasonal occurrence in a water treatment plant in south China. An iron Fe–Mn complex oxide film was found capable of removing more than 95% of Mn&l...
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MDPI AG
2022-12-01
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| Series: | Toxics |
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| Online Access: | https://www.mdpi.com/2305-6304/11/1/22 |
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| author | Xiangxuan Xing Tinglin Huang Ya Cheng Ruizhu Hu Gang Wen Kai Li |
| author_facet | Xiangxuan Xing Tinglin Huang Ya Cheng Ruizhu Hu Gang Wen Kai Li |
| author_sort | Xiangxuan Xing |
| collection | DOAJ |
| description | Exceeding the permitted manganese (Mn<sup>2+</sup>) and ammonium (NH<sub>4</sub><sup>+</sup>-N) levels is a frequent seasonal occurrence in a water treatment plant in south China. An iron Fe–Mn complex oxide film was found capable of removing more than 95% of Mn<sup>2+</sup> and NH<sub>4</sub><sup>+</sup>-N at a water temperature of 20 °C and an alkalinity level of 30 mg/L. It could remove up to 5.5 mg/L of Mn<sup>2+</sup> and up to 3.5 mg/L of NH<sub>4</sub><sup>+</sup>-N in a stable manner. Alkalinity is a crucial factor in the removal process. The morphology, elemental composition, and micro-structure of the oxide film were investigated using a scanning electron microscope, an energy-dispersive spectrometer, a Brunauer–Emmett–Teller specific surface-area analyzer, an X-ray diffractometer, and a Fourier-transform infrared spectrometer. The capacity of the Fe–Mn complex oxide film on the surface of the filter medium increased appreciably as its content and specific surface area increased. This research, which provides a theoretical basis for simultaneous manganese and NH<sub>4</sub><sup>+</sup>-N removal by catalytic oxidation, demonstrates an engineering reference value. |
| first_indexed | 2024-03-09T11:07:21Z |
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| issn | 2305-6304 |
| language | English |
| last_indexed | 2024-03-09T11:07:21Z |
| publishDate | 2022-12-01 |
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| spelling | doaj.art-a17fa068646e4c2888a86fe19563c3fb2023-12-01T00:55:16ZengMDPI AGToxics2305-63042022-12-011112210.3390/toxics11010022The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide FilmXiangxuan Xing0Tinglin Huang1Ya Cheng2Ruizhu Hu3Gang Wen4Kai Li5Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaKey Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaExceeding the permitted manganese (Mn<sup>2+</sup>) and ammonium (NH<sub>4</sub><sup>+</sup>-N) levels is a frequent seasonal occurrence in a water treatment plant in south China. An iron Fe–Mn complex oxide film was found capable of removing more than 95% of Mn<sup>2+</sup> and NH<sub>4</sub><sup>+</sup>-N at a water temperature of 20 °C and an alkalinity level of 30 mg/L. It could remove up to 5.5 mg/L of Mn<sup>2+</sup> and up to 3.5 mg/L of NH<sub>4</sub><sup>+</sup>-N in a stable manner. Alkalinity is a crucial factor in the removal process. The morphology, elemental composition, and micro-structure of the oxide film were investigated using a scanning electron microscope, an energy-dispersive spectrometer, a Brunauer–Emmett–Teller specific surface-area analyzer, an X-ray diffractometer, and a Fourier-transform infrared spectrometer. The capacity of the Fe–Mn complex oxide film on the surface of the filter medium increased appreciably as its content and specific surface area increased. This research, which provides a theoretical basis for simultaneous manganese and NH<sub>4</sub><sup>+</sup>-N removal by catalytic oxidation, demonstrates an engineering reference value.https://www.mdpi.com/2305-6304/11/1/22surface wateralkalinityiron–manganese complex oxide filmcatalytic oxidation |
| spellingShingle | Xiangxuan Xing Tinglin Huang Ya Cheng Ruizhu Hu Gang Wen Kai Li The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film Toxics surface water alkalinity iron–manganese complex oxide film catalytic oxidation |
| title | The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film |
| title_full | The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film |
| title_fullStr | The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film |
| title_full_unstemmed | The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film |
| title_short | The Simultaneous Removal of Ammonium and Manganese from Surface Water in South China by Manganese Co-Oxide Film |
| title_sort | simultaneous removal of ammonium and manganese from surface water in south china by manganese co oxide film |
| topic | surface water alkalinity iron–manganese complex oxide film catalytic oxidation |
| url | https://www.mdpi.com/2305-6304/11/1/22 |
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