Highly efficient activation of peroxymonosulfate by natural negatively-charged kaolinite with abundant hydroxyl groups for the degradation of atrazine

Li, Chunquan; Huang, Ying; Dong, Xiongbo; Sun, Zhiming; Duan, Xiaodi; Ren, Bangxing; Zheng, Shuilin; Dionysiou, Dionysios D.

doi:10.1016/j.apcatb.2019.01.079

Cited by 392 publications

(47 citation statements)

References 55 publications

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“…CuO and Fe 3 O 4 . 46 Additionally, the XPS results were further verified through FTIR analysis ( Figure S28). As shown, the incorporation of MgO as CuOMgO or CuOMgO/Fe 3 O 4 visibly increased the intensity of peak corresponded to terminal-OH and bridging-OH groups.…”

Section: Cuo/fe 3 O 4 and Cuo And Fe 3 O 4 Catalysts (mentioning

confidence: 92%

“…Surface hydroxyl group is documented in many recent publication and is believed to play important role in the catalytic activity of catalysts. [46][47][48][49] Therefore, we expected that the changes in the surface hydroxyl groups after the incorporation of MgO might be important to change the PMS complexation from inner sphere to outer sphere.…”

Section: Changes In the Redox Properties Of Copper After The Incorpormentioning

confidence: 99%

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Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide

Ali

Zhan

Wang

et al. 2020

Environ. Sci. Technol.

437

124

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Nonradical-based advanced oxidation processes for pollutant removal have attracted much attention due to their inherent advantages. Herein we report that magnesium oxides (MgO) in CuOMgO/Fe3O4 not only enhanced the catalytic properties but also switched the free radical peroxymonosulfate (PMS)-activated process into the 1O2 based nonradical process. CuOMgO/Fe3O4 catalyst exhibited consistent performance in a wide pH range from 5.0 to 10.0, and the degradation kinetics were not inhibited by the common free radical scavengers, anions, or natural organic matter. Quantitative structure–activity relationships (QSARs) revealed the relationship between the degradation rate constant of 14 substituted phenols and their conventional descriptor variables (i.e., Hammett constants σ, σ–, σ+), half-wave oxidation potential (E 1/2), and pK a values. QSARs together with the kinetic isotopic effect (KIE) recognized the electron transfer as the dominant oxidation process. Characterizations and DFT calculation indicated that the incorporated MgO alters the copper sites to highly oxidized metal centers, offering a more suitable platform for PMS to generate metastable copper intermediates. These highly oxidized metals centers of copper played the key role in producing O2 •– after accepting an electron from another PMS molecule, and finally 1O2 as sole reactive species was generated from the direct oxidation of O2 •– through thermodynamically feasible reactions.

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Section: Cuo/fe 3 O 4 and Cuo And Fe 3 O 4 Catalysts (mentioning

confidence: 92%

Section: Changes In the Redox Properties Of Copper After The Incorpormentioning

confidence: 99%

Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide

Ali

Zhan

Wang

et al. 2020

Environ. Sci. Technol.

437

124

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“…Kaolinite exhibits a layered structure, like sheets of paper laid over each other, alternating one tetrahedral sheet of silica bonded through oxygen to one octahedral sheet of alumina (Babu Valapa et al, 2017). Kaolinite exhibits extensive adsorbent characteristics both for inorganic and organic compounds Yu et al, 2013), as well as catalytic activity for a wide range of reactions Li et al, 2019;. Even though clays are present in small amounts in the oilfields (when compared to the major rock constituents) they can have significant interactions with the chemicals used as tracers.…”

Section: Rock Substrate -Kaolinitementioning

confidence: 99%

Development of new oil/water partitioning tracers for the determination of residual oil saturation in the inter-well region of water-flooded reservoirs

Silva¹

2021

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is credited to have said "the value of achievement lies in the achieving." This is true for everything in life, and I feel very lucky and thankful for all the people I worked with in the path leading to this thesis. It is also their achievement, as it would not be possible without them. I learned and was trained by the best in the field, who also showed me that an open-mind, humility, and hard-work pave the way forward. I would like to thank my supervisors, Professor Tor Bjørnstad and Professor Svein Magne Skjaeveland. Thank you, Tor, for all the insights, trust, freedom, patience, and advice! You truly are a role model, and I will be happy if I become half of what you are, both as a researcher and as a person. I could not have done this without you! Thank you Svein for all the kind and motivating words, for the example, and for the rigor with flexibility. This would not happen without you! I want to thank the team of the "Tracer Technology department" at IFE, particularly Sissel Opsahl Viig for sharing her knowledge, time, patience, and good humour, as well as for the help in disassembling and assembling instrumentation! Per Arne Hubred, one of the best humoured and cleverest engineers I ever met, who made the "magic happen" whenever experimental needs would hit a wall. Are Haugen, for all the trouble and help in welcoming me to a new workplace and a new country. Laura Ferrando-Climent, for all the small talk in coffee breaks, confidences, incentive, the friendship, and the sharing of insights about good scientific work. A special thank you to Helge Stray, my office colleague, "informal supervisor", for all the fruitful discussions and exchange of ideas, reviews, motivation, friendship, and help with personal and logistic issues upon my arrival in Norway. I would also like to thank the National IOR Centre of Norway for employing me and all its fantastic members, past and present colleagues at UiS, IFE and NORSE, especially Mahmoud Ould Metidji for the fantastic comradeship, friendship, and collaboration, Thomas Brichart vi for introducing me to the "nano-world" and for the comradeship, Jaspreet Singh Sachdeva for the optimism, motivation, and the insights about pore-scale phenomena, Eystein Opsahl for the warmth, good humour, good discussions, and excellent collaboration. Additionally, I want to thank Aksel Hiorth, Jan Ludvig Vinningland, Merete Madla Vadland, Randi Valestrand, for all the gatherings, discussions, and insights always with lots of fun! Many more are left out, each with valuable contributions. Working with the National IOR Centre of Norway was an exciting and challenging experience, filled with excellent scientific discussions, exchange of ideas and fun, without forgetting our industry partners and their valuable input. Finally, my biggest thank you to my family! To Sofia, for the strength and constant support throughout all the challenges I faced even while facing her own! None of my achievements would be possible without you as my partner and inspiration! To Maria João and Francisca, for being t...

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“…Hydroxyl in solution can catalyze PMS, and, recently, it has been found that hydroxyl group in minerals can also catalyze PMS [22]. Therefore, the hydroxyl group on MgO surface should also have a certain catalytic effect.…”

Section: Effect Of Hydroxyl and Oxygen Vacancy In The Mgo Surface On mentioning

confidence: 99%

“…Huang's group reported iron-copper bimetal doped mesoporous g-Al 2 O 3 catalyzed PMS to effectively degrade 4-chlorophenol, finding that the Al-O-Fe and Al-O-Cu bonds formed by Fe and Cu doping into the framework of g-Al 2 O 3 were the key structures for high activity of the catalyst [21]. Although these catalysts can activate PMS to some extent as well, complex in synthesis and lack of universality are also the obstacles for them to realize industrial application [22]. Thus, it is very important and urgent to develop a low-cost, high-efficiency, and easy-to-implement catalyst to activate persulfate for the degradation of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency Catalysis of Peroxymonosulfate by MgO for the Degradation of Organic Pollutants

et al. 2019

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In the study, magnesium oxide (MgO) was used to catalyze peroxymonosulfate (PMS) for the degradation of organic pollutants for the first time. According to the single-factor experiment results, it was determined that MgO could efficiently catalyze PMS to degrade organic matters in a wide range of pH values. Based on radical quenching experiments and electron spinning resonance spectra, singlet oxygen was identified to be the crucial reactive species. Importantly, the oxygen vacancy on the surface of MgO was determined as the key active site, which accelerated the decomposition of PMS to produce singlet oxygen. This study provides an interesting insight into the novel and ignored catalyst of MgO for the highly efficient activation of PMS, which will greatly benefit the Fenton-like catalytic degradation of organic wastewater.

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Highly efficient activation of peroxymonosulfate by natural negatively-charged kaolinite with abundant hydroxyl groups for the degradation of atrazine

Cited by 392 publications

References 55 publications

Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide

Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide

Development of new oil/water partitioning tracers for the determination of residual oil saturation in the inter-well region of water-flooded reservoirs

High-Efficiency Catalysis of Peroxymonosulfate by MgO for the Degradation of Organic Pollutants

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