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Liang J, Huang W, Wei S, Tian C, Zhang X, Nong G, Wang S, Song H. Photodegradation performance and mechanism of sulfadiazine in Fe(III)-EDDS-activated persulfate system. ENVIRONMENTAL TECHNOLOGY 2023; 44:3518-3531. [PMID: 35389823 DOI: 10.1080/09593330.2022.2064238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/27/2022] [Indexed: 06/14/2023]
Abstract
In order to overcome the shortcomings in the traditional Fenton process, Fe(III)-EDDS-activated persulfate advanced oxidation process under irradiation is carried out as a promising technology. The photodegradation of sulfadiazine (SD) in Fe(III)-EDDS-activated persulfate system was investigated in this paper. The results showed that SD could be effectively degraded in Fe(III)-EDDS/S 2 O 8 2 - /hv system. The effects of Fe(III):EDDS molar ratio, the concentration of Fe(III)-EDDS, and the concentration of S 2 O 8 2 - on SD degradation were explored. At neutral pH, when Fe(III):EDDS = 1:1, Fe(III)-EDDS = 0.1 mM, S 2 O 8 2 - = 1.5 mM, the best SD degradation was achieved. The experiment of external influence factors showed that the degradation of SD could be obviously inhibited by the presence of C O 3 2 - , S O 4 2 - , whereas the degradation of SD was almost unaffected by the addition ofCl-. The degradation of SD could be slightly inhibited by the presence of humic acid and NO3-. The effect of pH on SD degradation was investigated, and SD could be degraded effectively in the pH range of 3-9. ESR proved that 1O2, ·OH, S O 4 - , and O2- were produced in the process. S O 4 - and ·OH were identified as the main radicals while O2·- also played non-ignorable role. Eleven intermediate products of SD were analysed. The C = N, S-N, and S-C bonds of SD were attacked by radicals firstly, leading to a series of reactions that eventually resulted in the destruction of SD molecules and the formation of small organic molecules.
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Affiliation(s)
- Jianwei Liang
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Wenyu Huang
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning, People's Republic of China
| | - Shiping Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Chengyue Tian
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Xinyun Zhang
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Guoyou Nong
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Shuangfei Wang
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning, People's Republic of China
- College of Light Industry and Food Engineering, Guangxi University, Nanning, People's Republic of China
| | - Hainong Song
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning, People's Republic of China
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Wei S, Huang Y, Huang W, Wang X, Liang J. Degradation of 2,4-Dichlorophenol by Nitrilotriacetic acid-modified photo-Fenton system: effects of organic and inorganic factors. ENVIRONMENTAL TECHNOLOGY 2023; 44:2011-2023. [PMID: 34913858 DOI: 10.1080/09593330.2021.2020338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 12/09/2021] [Indexed: 05/25/2023]
Abstract
It has proved that the photo-Fenton system modified by polycarboxylic acid is effective against the degradation of organic pollutants. Still, its effect and impact on actual water bodies are not clear. Therefore, this study mainly discussed the effect of actual water elements on the degradation of 2,4-Dichlorophenol in photo-Fenton system modified by Nitrilotriacetic acid (NTA) and its mechanism in pure water. The specific research contents were: the effect of initial concentration of 2,4-Dichlorophenol on its degradation efficiency; the effect of organic matters on the degradation of 2,4-Dichlorophenol; the effect of cations and anions; the effect of different actual water bodies. And the main results were as follows: In the effect of initial concentration, when the concentration of 2,4-Dichlorophenol was 20 mg·L-1, the degradation efficiency was the best (reached 100%). But, with the increase of initial concentration, the degradation efficiency of the system became worse and worse; the coexistence of the same kind of organic compounds can inhibit each other's degradation, and the degradation rate of pollutants in the mixed system was slower than that in the single system; the addition of anions and cations inhibited the degradation of 2,4-Dichlorophenol, and the degradation efficiency varied with the concentration of ions, in which the effect of anions was more complex; the degradation efficiency of 2,4-Dichlorophenol in three kinds of actual water bodies was lower than in deionized water, especially in PPMW. However, the degradation rates of DSTP and NLW were the fastest in the first 20 min.
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Affiliation(s)
- Shiping Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
| | - Ying Huang
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning, People's Republic of China
| | - Wenyu Huang
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
- Guangxi Bossco Environmental Protection Technology Co., Ltd, Nanning, People's Republic of China
| | - Xiaofei Wang
- School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi, People's Republic of China
| | - Jianwei Liang
- School of Resources, Environment and Materials, Guangxi University, Nanning, People's Republic of China
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Photocatalytic Processes for Environmental Applications. Processes (Basel) 2021. [DOI: 10.3390/pr9112080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Photocatalysis, especially heterogeneous photocatalysis, is one of the most investigated processes for environmental remediation [...]
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