Carbocatalytic ozonation toward advanced water purification DOI Open Access
Ya Liu, Chunmao Chen, Xiaoguang Duan

et al.

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(35), P. 18994 - 19024

Published: Jan. 1, 2021

This review summarizes the recent advances in carbocatalyzed ozonation and corresponding surface engineering protocols mechanistic insights.

Language: Английский

Can the commonly used quenching method really evaluate the role of reactive oxygen species in pollutant abatement during catalytic ozonation? DOI
Yang Guo, Jingfei Long, Jun Huang

et al.

Water Research, Journal Year: 2022, Volume and Issue: 215, P. 118275 - 118275

Published: March 9, 2022

Language: Английский

Citations

316
The debatable role of singlet oxygen in persulfate-based advanced oxidation processes DOI
Liangjie Wang, Ke Xiao, Huazhang Zhao

et al.

Water Research, Journal Year: 2023, Volume and Issue: 235, P. 119925 - 119925

Published: March 28, 2023

Language: Английский

Citations

196
Challenges and pitfalls in the investigation of the catalytic ozonation mechanism: A critical review DOI
Yujue Wang,

Gang Yu

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 436, P. 129157 - 129157

Published: May 17, 2022

Language: Английский

Citations

101
Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details DOI
Xiaonan Hu, Mingshan Zhu

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(24), P. 10415 - 10444

Published: June 7, 2024

Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases appeals pay more attention experimental details in PS-AOPs, so as accurately explore reaction mechanisms. The scientifically summarizes character, generation, different species. It then highlights complexities analysis electron paramagnetic resonance, uncertainties use probes scavengers, necessities determination scavenger concentration. importance choice buffer solution, operating mode, terminator, filter membrane is also emphasized. Finally, we discuss current challenges future perspectives alleviate misinterpretations toward mechanisms PS-AOPs.

Language: Английский

Citations

83
Insights into reactive species generation and organics selective degradation in Fe-based heterogeneous Fenton-like systems: A critical review DOI
Ling Li, Zhuo Yin, Min Cheng

et al.

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 140126 - 140126

Published: Nov. 9, 2022

Language: Английский

Citations

79
Evaluation of the role of superoxide radical as chain carrier for the formation of hydroxyl radical during ozonation DOI
Yang Guo,

Gang Yu,

Urs von Gunten

et al.

Water Research, Journal Year: 2023, Volume and Issue: 242, P. 120158 - 120158

Published: May 31, 2023

Language: Английский

Citations

47
Environmental implications of superoxide radicals: From natural processes to engineering applications DOI Creative Commons

Zonghao Luo,

Yiqi Yan,

Richard Spinney

et al.

Water Research, Journal Year: 2024, Volume and Issue: 261, P. 122023 - 122023

Published: July 1, 2024

The roles of superoxide radical (O

Language: Английский

Citations

32
Z-Scheme Heterojunction α-Fe2O3/Tubular g-C3N4 with C Defects for Photocatalytic Degradation of Microcystin-LR in Water: Generation and Effect of Critical Species 1O2 DOI

Haoxiang Zhong,

Xiaodong Ji,

Cheng Yang

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(8), P. 6272 - 6291

Published: April 10, 2024

Microcystin-LR (MC-LR) is susceptible to degradation by singlet oxygen (1O2) attack due multiple unsaturated olefinic bond sites. In this study, the Z-scheme heterojunction α-Fe2O3/tubular g-C3N4 with C defects (α-Fe2O3/TDCN) was synthesized via hydrothermal and cocalcination methods. The efficient generation of 1O2 realized enhancing photogenerated carrier separation adsorption capabilities used investigate process mechanism MC-LR. results show that rate MC-LR can reach nearly 100% within 60 min under visible light irradiation, α-Fe2O3/TDCN possesses good stability environmental friendliness. relationship between photocatalyst performance analyzed density functional theory (DFT) calculations. Based on probe experiments, LC–MS data, DFT calculations, mineralization dominated analyzed. This study provides a reference for addressing pollution in eutrophic aquatic environments direction specific control mineralization.

Language: Английский

Citations

31
Electrostatic Field in Contact‐Electro‐Catalysis Driven C−F Bond Cleavage of Perfluoroalkyl Substances DOI
Yanfeng Wang, Jing Zhang, Wenkai Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(19)

Published: March 1, 2024

Abstract Perfluoroalkyl substances (PFASs) are persistent and toxic to human health. It is demanding for high‐efficient green technologies remove PFASs from water. In this study, a novel PFAS treatment technology was developed, utilizing polytetrafluoroethylene (PTFE) particles (1–5 μm) as the catalyst low frequency ultrasound (US, 40 kHz, 0.3 W/cm 2 ) activation. Remarkably, system can induce near‐complete defluorination different structured PFASs. The underlying mechanism relies on contact electrification between PTFE water, which induces cumulative electrons surface, creates high surface voltage (tens of volts). Such generate abundant reactive oxygen species (ROS, i.e., O ⋅ − , HO⋅, etc.) strong interfacial electrostatic field (IEF 10 9 ~10 V/m). Consequently, IEF significantly activates molecules reduces energy barrier nucleophilic reaction. Simultaneously, co‐existence (PTFE*( e )) HO⋅ enables synergetic reduction oxidation its intermediates, leading enhanced thorough defluorination. US/PTFE method shows compelling advantages consumption, zero chemical input, few harmful intermediates. offers new promising solution effectively treating PFAS‐contaminated drinking

Language: Английский

Citations

23
UVA-LED-Assisted Activation of the Ferrate(VI) Process for Enhanced Micropollutant Degradation: Important Role of Ferrate(IV) and Ferrate(V) DOI
Tao Yang,

Jiamin Mai,

Haijun Cheng

et al.

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 56(2), P. 1221 - 1232

Published: Dec. 27, 2021

This paper investigated ultraviolet A light-emitting diode (UVA-LED) irradiation to activate Fe(VI) for the degradation of micropollutants (e.g., sulfamethoxazole (SMX), enrofloxacin, and trimethoprim). UVA-LED/Fe(VI) could significantly promote micropollutants, with rates that were 2.6-7.2-fold faster than alone. Comparatively, UVA-LED alone hardly degraded selected micropollutants. The performance was further evaluated in SMX via different wavelengths (365-405 nm), light intensity, pH. Increased led linearly decreased because has a lower molar absorption coefficient at higher wavelengths. Higher intensity caused degradation, owing enhanced level reactive species by stronger photolysis Fe(VI). Significantly, gradually suppressed from pH 7.0 9.0 due changing speciation Scavenging probing experiments identifying oxidative indicated high-valent iron (Fe(V)/Fe(IV)) responsible degradation. kinetic model involving target compound (TC) Fe(VI), Fe(V), Fe(IV) employed fit TC kinetics UVA-LED/Fe(VI). fitted results revealed Fe(V) primarily contributed this system. In addition, transformation products identified possible pathways included hydroxylation, self-coupling, bond cleavage, oxidation reactions. Removal real water also showed remarkable promotion Overall, these findings shed on understanding application eliminating treatments.

Language: Английский

Citations

103