Article
Chemistry, Physical
Yi Zhao, Yang Liu, Yuying Wang, Shulan Li, Yi Liu, Zhong Lin Wang, Peng Jiang
Summary: Solid-liquid interfaces are widely present in nature and have various applications. Electron transfer at the interface has been discovered, and a two-step theory for the formation of solid-liquid electric double layer (EDL) has been proposed. Hydroxyl radical (.OH) is generated at the interface without external interference, and its concentration increases with pH, indicating that it is generated from hydroxide ions (OH-) through electron transfer during contact electrification. The generation of reactive oxygen species (.OH and .O2-) at the interface has potential applications in pollutant degradation.
Article
Engineering, Environmental
Qiang Bi, Sisi Jiang, Changfeng Hu, Li Zhang, Yilin Zhao, Bo Yang, Guoping Li, Juanqin Xue
Summary: In this study, a N/Co-co-doped graphite gas diffusion electrode (Co-NG GDE) has been prepared and applied in the E-peroxone system. Surprisingly, Co-NG GDE exhibits the highest degradation efficiency for phenol and oxalate, despite its poor performance in the ORR to H2O2. The abundance of O2(center dot-) produced by Co-NG GDE, due to its higher pyridine-N content, can replace H2O2 to form super-active center dot OH.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Lei Yang, Hong Huang, Ting Wang, Danling Zhou, Qing Chen, Dan Li, Shuzi Chen, Ping Lin
Summary: The endoplasmic reticulum, as the largest cellular organelle, plays a crucial role in protein synthesis, folding, transportation, and maintaining Ca2+ homeostasis. imbalances in its environment can lead to endoplasmic reticulum stress and metabolic diseases. In this study, we developed endoplasmic reticulum-targeting Se-doped carbon nanodots, which were shown to effectively eliminate reactive oxygen species and protect cells from oxidative damage. The carbon nanodots also demonstrated anti-inflammatory effects in mice.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Environmental
Kefeng Shang, Rino Morent, Ning Wang, Yongxin Wang, Bangfa Peng, Nan Jiang, Na Lu, Jie Li
Summary: The study shows that persulfate can enhance the degradation of sulfamethoxazole in a water falling film dielectric barrier discharge plasma reactor, with PMS performing better than PDS. Increasing the applied voltage, solution pH, and PMS/PDS concentration promotes SMX degradation. The reactive species generated from the activation of PMS/PDS by discharge plasma play a key role in SMX degradation, with center dot OH and SO4 center dot- being particularly important.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Nacer Belkessa, Youcef Serhane, Abdelkrim Bouzaza, Lotfi Khezami, Aymen Amin Assadi
Summary: This study investigates the photocatalytic oxidation of ethylbenzene vapor using TiO2 catalyst and explores the role of reactive species and degradation pathways. The results show that water vapor content, reaction atmosphere, and UV radiation wavelength significantly affect the degradation of ethylbenzene, with the hydroxyl radical playing a major role in the photocatalytic mechanism.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Yang Guo, Yixin Zhang, Gang Yu, Yujue Wang
Summary: By comparing the conventional scavenger approach with the proposed probe approach, this study found that using probes can accurately reveal catalytic ozonation mechanisms and provide an effective way to assess the contribution of various ROS to pollutant abatement.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Yang Guo, Juhong Zhan, Gang Yu, Yujue Wang
Summary: During ozonation, the concentrations ratios of hydroxyl radicals, superoxide radicals and ozone remain constant, indicating the potential non-negligible role of superoxide radicals in the degradation of certain micropollutants with similar or higher reactivity compared to hydroxyl radicals. The proposed chemical kinetic model accurately simulates the abatement efficiencies of ozone-resistant micropollutants by considering the contribution of superoxide radicals, providing a valuable tool for predicting micropollutant removal during ozonation.
Review
Chemistry, Analytical
Wanchao Yu, Lixia Zhao
Summary: ROS, as important oxidizing species in ecosystems, play various roles and monitoring their concentration is crucial for the environment. The chemiluminescence method has attracted attention for ROS detection due to its high sensitivity and simplicity, showing advances in recent years.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Engineering, Environmental
Sin-Yi Liou, Michael C. Dodd
Summary: The reaction of hypochlorous acid with superoxide radical can be a novel nonphotochemical advanced oxidation process, generating hydroxyl radical and various reactive chlorine species, with high radical exposures, simplicity, rapid time-scales, and potential for on-site superoxide generation.
Article
Biochemical Research Methods
Xiaowei Lan, Yujie Dai, Wenjie Jing, Xuan Meng, Fufeng Liu, Sen Wang, Ao He, Nan Li
Summary: In this study, the reaction mechanisms and energy barriers of CO2-containing systems with hydroxyl radical were investigated using density functional theory. The results show that the reaction of hydroxyl with HCO3- has the lowest energy barrier and the maximum reaction rate constant, while the reaction of hydroxyl radical with CO2 has the highest energy barrier and the minimum reaction rate constant. The dissociation process indicates that HCO3- is a strong acid and hydroxyl radicals are spontaneously converted to carbonate radical anions in CO2-containing systems.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2022)
Article
Engineering, Environmental
Yang Guo, Gang Yu, Urs von Gunten, Yujue Wang
Summary: Superoxide radicals (O-2(center dot-)) are important chain carriers in the radical chain reaction during ozonation, promoting the decomposition of ozone (O-3) to hydroxyl radicals ((OH)-O-center dot). This study used a probe compound and kinetic modeling to evaluate the role of O-2(center dot-) for O-3 decomposition during ozonation of synthetic solutions and natural waters. The results showed that O-2(center dot-) plays a critical role in promoting O-3 decomposition, with its contribution ranging from 45-70% depending on water composition.
Article
Chemistry, Multidisciplinary
Tsz-Kan Ma, Diyuan Li, Jonathan D. Wilden
Summary: Mechanistic studies of a reactive oxygen species mediated electrochemical radical reaction of alkyl iodides are described. Hydroxyl radicals and ozone are identified as the active species involved in the formation of alkyl radicals under mildly reducing potential (-1.0 V vs. Ag QRE) in buffered acidic conditions (pH 3.6).
CHEMICAL COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Nayara de Melo Costa-Serge, Rosembergue Gabriel Lima Goncalves, Hernan Dario Rojas-Mantilla, Celso Valentim Santilli, Peter Hammer, Raquel Fernandes Pupo Nogueira
Summary: The catalytic activity of layered double hydroxides, with and without copper insertion, was evaluated for the degradation of sulfathiazole. The insertion of copper increased the specific area of the material and degradation kinetics, achieving complete removal of STZ. The presence of Cu(II) and Cu(I) surface sites contributed to the generation of radicals crucial for the degradation process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Multidisciplinary Sciences
Mouli Saha, Saurabh Das
Summary: Cytotoxicity of anthracycline antibiotics is mainly attributed to the generation of free-radical intermediates, which may also lead to cardiotoxicity. Modulation of redox behavior needs to balance cytotoxicity and cardiotoxicity. Experimental results suggest that anthracycline analogues have a significant impact on nucleobases, while their effects on DNA are relatively minor.
Review
Environmental Sciences
Enric Brillas
Summary: Antibiotics are widely used to fight and heal bacterial diseases in animals and humans worldwide. However, they have been detected at low concentrations in natural waters, posing potential health risks and causing alterations in food chains and increased resistance to bacterial infection. Conventional wastewater treatment plants struggle to effectively remove antibiotics due to their high stability. The electro-Fenton (EF) process, as an advanced oxidation process, shows promise for the destruction of antibiotics. This review provides a comprehensive analysis of the application of EF in treating synthetic and real wastewaters contaminated with common antibiotics from 2017 to 2021.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)