Homogeneous photocatalytic degradation of sulfamethazine induced by Fe(III)-carboxylate complexes: Kinetics, mechanism and products

Ouyang, Zhuozhi; Yang, Chen; He, Junheng; Yao, Qian; Zhang, Bijie; Wang, Hanming; Jiang, Yu; Zhou, Jini; Deng, Yurong; Liu, Yanjun; Yang, Jingjing; Lu, Guining; Dang, Zhi

doi:10.1016/j.cej.2020.126122

Cited by 36 publications

(5 citation statements)

References 63 publications

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“…This is higher than the previous report that SMX removal of 52.3% was achieved in wastewater using an Fe(II)activated persulfate process [31]. Previous research also reported that sunlight/Fe(III)citrate complexes can degrade propranolol and sulfamethazine, as a sunlight/Fe(III)-citrate system can generate multiple reactive radicals (Equations ( 6)-( 10)), with •OH generally playing the significant role [25,32]. In a sunlight/Fe(II)/Cit/PS system, except for the reactions that occurred in the sunlight/Fe(II)/Cit system, the regenerated Fe(II) can activate PS and generate more radical species (Equation ( 1)), consequently enhancing the degradation of SMX in secondary wastewater.…”

Section: Resultsmentioning

confidence: 55%

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Chen,

Zhu,

Zhou

et al. 2024

Water

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The narrow pH application range and lower utilization of ferrous ions (Fe(II)) restrict the application of Fe(II)/persulfate (PS) technology. In this paper, simulated sunlight and citric acid (Cit) as a chelator were introduced in an Fe(II)/PS system to overcome the drawbacks and enhance the degradation of typical antibiotic sulfamethoxazole (SMX) in secondary wastewater. The degradation kinetics, mechanism, and influence factors of SMX in a sunlight/Fe(II)/Cit/PS system and a sunlight/Fe(II)/Cit system as a comparable system were investigated. The removal efficiency of SMX can reach 71.15% and 85.25% in the sunlight/Fe(II)/Cit system and sunlight/Fe(II)/Cit/PS system with 0.1 mM Fe(II), 0.6 mM Cit, and 1 mM PS. The increase of Fe(II) concentration in both systems proved that sunlight promoted the regeneration of Fe(II) from the ferric ion chelates. However, the Fe(II) concentration decreased after 30 min in the sunlight/Fe(II)/Cit/PS system because of the decomposition of Cit. Radical quencher experiments indicated that SO4·−, ·OH, and O2·− contributed 2.48%, 88.43%, and 6.91% to the removal of SMX, respectively. Electron paramagnetic resonance spectra also proved the formation of ·OH and O2·−. The degradation of SMX was proposed to proceed via isomerization, cleavage of S–N bond, and hydroxylation. Overall, the sunlight/Fe(II)/Cit/PS process can be used as an advanced treatment technology for antibiotics in municipal wastewater.

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Section: Resultsmentioning

confidence: 55%

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Chen,

Zhu,

Zhou

et al. 2024

Water

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“…In path III, the molecular structure of pyrimidine is rearranged to form P7, and finally, the C–N bond is broken to form P8. 64–66…”

Section: Resultsmentioning

confidence: 99%

“…In path III, the molecular structure of pyrimidine is rearranged to form P7, and nally, the C-N bond is broken to form P8. [64][65][66] 3.5.2 Degradation pathway for sulfadiazine (SD). Fig.…”

Section: Analysis Of the Sa Degradation Pathwaymentioning

confidence: 99%

Direct Z-scheme P–TiO₂/g-C₃N₄ heterojunction for the photocatalytic degradation of sulfa antibiotics

Dai

Yuan

et al. 2023

RSC Adv.

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“…The photodegradation process plays an essential role in the transformation of organic pollutants in aquatic environments, particularly those having photoreactive groups. 17 TC compounds could absorb photons in the ultraviolet−visible (UV− vis) wavelength range owing to their conjugated benzene− enone structures, rendering the molecule photoreactive and susceptible to photodegradation when exposed to sunlight irradiation. 18 Besides direct photodegradation, TC compounds may be susceptible to indirect photodegradation owing to reactive species, such as superoxide anion (O 2…”

Section: ■ Introductionmentioning

confidence: 99%

Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms

Ding

Ouyang

Zhang

et al. 2023

Environ. Sci. Technol.

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Tire wear particles (TWPs) exposed to the aquatic environment are rapidly colonized by microorganisms and provide unique substrates for biofilm formation, which potentially serve as vectors for tetracycline (TC) to influence their behaviors and potential risks. To date, the photodegradation capacity of TWPs on contaminants due to biofilm formation has not been quantified. To accomplish this, we examined the ability of virgin TWPs (V-TWPs) and biofilm-developed TWPs (Bio-TWPs) to photodegrade TC when exposed to simulated sunlight irradiation. V-TWPs and Bio-TWPs accelerated the photodegradation of TC, with rates (k obs) of 0.0232 ± 0.0014 and 0.0152 ± 0.0010 h–1, respectively (k obs increased by 2.5–3.7 times compared to that for only TC solution). An important factor of increased TC photodegradation behavior was identified and linked to the changed reactive oxygen species (ROS) of different TWPs. The V-TWPs were exposed to light for 48 h, resulting in more ROS for attacking TC, with hydroxyl radicals (•OH) and superoxide anions (O2 •–) playing a dominant role in TC photodegradation measured using scavenger/probe chemicals. This was primarily due to the greater photosensitization effects and higher electron-transfer capacity of V-TWPs in comparison to Bio-TWPs. In addition, this study first sheds light on the unique effect and intrinsic mechanism of the crucial role of Bio-TWPs in TC photodegradation, enhancing our holistic understanding of the environmental behavior of TWPs and the associated contaminants.

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Homogeneous photocatalytic degradation of sulfamethazine induced by Fe(III)-carboxylate complexes: Kinetics, mechanism and products

Cited by 36 publications

References 63 publications

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Direct Z-scheme P–TiO₂/g-C₃N₄ heterojunction for the photocatalytic degradation of sulfa antibiotics

Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms

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Homogeneous photocatalytic degradation of sulfamethazine induced by Fe(III)-carboxylate complexes: Kinetics, mechanism and products

Cited by 36 publications

References 63 publications

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Degradation of Sulfamethoxazole in Secondary Wastewater Based on Persulfate Activated by Citric-Acid-Complexed Ferrous Ion under Sunlight

Direct Z-scheme P–TiO2/g-C3N4 heterojunction for the photocatalytic degradation of sulfa antibiotics

Biofilm-Colonized versus Virgin Black Microplastics to Accelerate the Photodegradation of Tetracycline in Aquatic Environments: Analysis of Underneath Mechanisms

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Direct Z-scheme P–TiO₂/g-C₃N₄ heterojunction for the photocatalytic degradation of sulfa antibiotics