Atrazine degradation using Fe3O4-sepiolite catalyzed persulfate: Reactivity, mechanism and stability

Xu, Ximeng; Chen, Wei-Ming; Zong, Shaoyan; Ren, Xu; Liu, Dan

doi:10.1016/j.jhazmat.2019.05.029

Cited by 87 publications

(16 citation statements)

References 42 publications

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“…As mentioned above, hydroxyl ( • OH) and sulfate (SO 4 –• ) radicals both play dominant role in the NO removal process. Many works have been carried out to investigate the reaction mechanism of decomposing the solid persulfate. − Among the proposed mechanisms, the chain reaction for uncatalyzed decomposition of persulfate has been proven to be of persuasiveness and feasibility, which could also be extended to the case in which an oxidizable substance is present in the aqueous phase. , On the basis of the mechanism, the following equations could be assumed for NO removal process when coupled with some activation methods. ,,, With the purpose of further investigating the mechanism, the key free radicals, • OH and SO 4 –• , also were determined with EPR technique. From Figure , the free radicals with different signals are well captured with an EPR spectrometer under the experimental conditions.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Many works have been carried out to investigate the reaction mechanism of decomposing the solid persulfate. 38−40 Among the proposed mechanisms, the chain reaction for uncatalyzed decomposition of persulfate has been proven to be of persuasiveness and feasibility, 40 which could also be extended to the case in which an oxidizable substance is present in the aqueous phase. 41,42 On the basis of the mechanism, the following equations could be assumed for NO removal process when coupled with some activation methods.…”

Section: Resultsmentioning

confidence: 99%

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Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂

Wang

Shi

et al. 2020

Energy Fuels

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In this study, MnO2 nanotubes, nanowires, and nanoparticles were synthetized by a hydrothermal method, after which the NO removal process with sodium persulfate solution catalyzed by MnO2 of different shapes was studied and compared. It could be verified that MnO2 nanowires showed the best NO removal efficiency of 91.2% with the catalyst concentration of 0.06 mol/L. As illustrated from the XRD, SEM, TEM, and XPS analysis results, the relatively higher activity of MnO2 nanowires could be attributed to its low crystallinity and the presence of more lattice oxygen. The reaction mechanism was further confirmed by using the electron paramagnetic resonance technique, which verified the promotional effect by capturing the signal of hydroxyl (•OH) and sulfate (SO4 –•) radicals. Additionally, free radical-quenching experiments also verified the decisive impacts of these two radicals on the removal system, where sulfate (SO4 –•) radicals played a major role.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂

Wang

Shi

et al. 2020

Energy Fuels

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“…Fe 3 O 4 − sepiolite composite activated PS As the PS concentration of 92 mmol/L, the system could remove 71.6% of atrazine after 60 min. reaction [63].…”

Section: Activation Methods Removal Effectmentioning

confidence: 99%

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment

Liu

You

et al. 2019

IJERPH

104

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Atrazine is a kind of triazine herbicide that is widely used for weed control due to its good weeding effect and low price. The study of atrazine removal from the environment is of great significance due to the stable structure, difficult degradation, long residence time in environment, and toxicity on the organism and human beings. Therefore, a number of processing technologies are developed and widely employed for atrazine degradation, such as adsorption, photochemical catalysis, biodegradation, etc. In this article, with our previous research work, the progresses of researches about the treatment technology of atrazine are systematically reviewed, which includes the four main aspects of physicochemical, chemical, biological, and material-microbial-integrated aspects. The advantages and disadvantages of various methods are summarized and the degradation mechanisms are also evaluated. Specially, recent advanced technologies, both plant-microbial remediation and the material-microbial-integrated method, have been highlighted on atrazine degradation. Among them, the plant-microbial remediation is based on the combined system of soil-plant-microbes, and the material-microbial-integrated method is based on the synergistic effect of materials and microorganisms. Additionally, future research needs to focus on the excellent removal effect and low environmental impact of functional materials, and the coordination processing of two or more technologies for atrazine removal is also highlighted.

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“…Therefore, the acid-treated sepiolite was often used to the support material for metal oxides TiO 2 , ZnO, Fe 3 O 4 , Cu 2 O, etc. (Xu et al, 2010;Zhu et al, 2012;Daneshkhah et al, 2017;Xu et al, 2019;. In our pervious study, we have prepared CoAl 2 O 4 /sepiolite nanofibers composite and Co./ CoAl 2 O 4 /sepiolite nanocomposite via different methods (Zhang et al, 2018;Wang F. et al, 2019;Hao et al, 2021;Wang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

A Facile Fabrication of ZnFe2O4/Sepiolite Composite with Excellent Photocatalytic Performance on the Removal of Tetracycline Hydrochloride

et al. 2021

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The excellent photo-response of ZnFe2O4 in the visible light region makes it a promising catalyst, whereas some defects like serious particle agglomeration and easy recombination of photo-generated electron-hole pairs hinder its application. In this work, the ZnFe2O4/sepiolite (ZF-Sep) composites were synthesized using a co-precipitation method. The obtained ZF-Sep composites were characterized by XRD, SEM, TEM, FT-IR, XPS, BET, VSM and DRS. Moreover, the photocatalytic performance was evaluated by the tetracycline hydrochloride removal efficiency under simulated visible light illumination. The results displayed that the ZnFe2O4 with average sizes about 20 nm were highly dispersed on sepiolite nanofibers. All the composites exhibited better photocatalytic performance than pure ZnFe2O4 due to the synergistic effect of the improvement on the agglomeration phenomenon of ZnFe2O4 and the reduction on the recombination rate of photo-generated electrons and holes. The optimum removal efficiency was that of the ZF-Sep-11 composite, which reached 93.6% within 3 h. Besides, the composite exhibited an excellent stability and reusability. Therefore, ZF-Sep composite is a promising catalyst for the treatment of wastewater contained antibiotics.

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Atrazine degradation using Fe3O4-sepiolite catalyzed persulfate: Reactivity, mechanism and stability

Cited by 87 publications

References 42 publications

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment

A Facile Fabrication of ZnFe2O4/Sepiolite Composite with Excellent Photocatalytic Performance on the Removal of Tetracycline Hydrochloride

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Atrazine degradation using Fe3O4-sepiolite catalyzed persulfate: Reactivity, mechanism and stability

Cited by 87 publications

References 42 publications

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO2

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO2

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment

A Facile Fabrication of ZnFe2O4/Sepiolite Composite with Excellent Photocatalytic Performance on the Removal of Tetracycline Hydrochloride

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Product

Resources

About

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂

Removal of NO by Using Sodium Persulfate Solution: Catalyzed by Different Nanostructured MnO₂