Article
Engineering, Environmental
Lingwei Gao, Yang Guo, Juhong Zhan, Gang Yu, Yujue Wang
Summary: This study evaluated the effects of various quenchers on the mechanism of a cobalt mediated peroxymonosulfate (Co(II)/PMS) process and found that these quenchers not only quench target reactive species but also cause interference effects. Therefore, caution should be exercised when applying the quenching method to investigate the mechanism of the persulfate-based process.
Article
Engineering, Environmental
Changyin Zhu, Guodong Fang, Fengxiao Zhu, Dixiang Wang, Chenyan Xue, Ning Chen, Juan Gao, Dongmei Zhou
Summary: This study demonstrates that activated carbon can mediate oxidative species formation and pollutants transformation under aerobic conditions, with oxygen participating in the production of hydroxyl radicals.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Xinfu Chen, Jing Su, Yue Meng, Minda Yu, Mingxia Zheng, Yuanyuan Sun, Beidou Xi
Summary: In this study, an oxygen vacancies (OVs)-rich micro zero-valent iron (mZVI) interface with mechanical chloride (Cl) doping was reported for selective and efficient H2O2 degradation. The presence of OVs accelerated electron transfer and produced abundant adsorbed ferrous due to the charge unbalance of mZVI. The Cl-ZVIBM/H2O2 system increased the yield of center dot OH threefold without a significant increase in subordinate reactive oxygen species, and the degradation rate for sulfamethazine was enhanced by 13 folds. The prepared catalyst maintained catalytic reactivity for more than 230 days in dry air. The study demonstrated the promising application of an OVs-rich iron-based catalyst in practical water remediation through a simple mechanochemistry method of doping halogen elements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Meryem Soyluoglu, Daekyun Kim, Yeakub Zaker, Tanju Karanfil
Summary: This study investigated the application of nanobubble technology in controlling geosmin and MIB, and examined their removal mechanisms. Volatilization and oxidation were found to be the main removal mechanisms, with alkalinity and temperature affecting their removal efficiency to some extent.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Juqin An, Huibin Liu, Xinming Wang, Dilinuer Talifu, Abulikemu Abulizi, Mailikezhati Maihemuti, Kejun Li, Haifeng Bai, Ping Luo, Xiaoxia Xie
Summary: This study quantified and studied reactive oxygen species (ROS) induced by particulate matter in Hotan, China. It was found that ROS production was higher in non-dust periods compared to dust periods, and PM2.5 with larger surface area showed increased ROS generation. Trace metals were also found to be correlated with ROS production in the particles.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Chemistry, Physical
Zhiyuan Feng, Qingling Tian, Qianqian Yang, Yanbo Zhou, Hongying Zhao, Guohua Zhao
Summary: This study demonstrates the efficient treatment of coal water slurry gasification wastewater using a CuCN/photoelectrochemical system, reducing TOC levels with low energy consumption. The treated wastewater can be utilized for salt recovery and utilization, highlighting the potential of synergistic photo-electro-catalytic effects in wastewater remediation processes, especially for saline coal wastewater.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Engineering, Environmental
Yelim Kim, Hongshin Lee, Hoon Oh, Zeeshan Haider, Jaemin Choi, Yong-Uk Shin, Hyoung-il Kim, Jaesang Lee
Summary: This study reexamined the mechanisms of oxidative organic degradation by the binary mixture of periodate and H2O2 (PI/H2O2). The findings showed that PI/H2O2 predominantly decomposes organics by ·OH at pH < 5, contradicting previous claims. The study also revealed a potential switch in the major oxidant under varying pH conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yingying Chu, Lijie Xu, Lu Gan, Weichuan Qiao, Jiangang Han, Xiang Mei, He Guo, Wei Li, Chun Pei, Han Gong, Xuewen Guo
Summary: The UV/S(IV) process with natural reoxygenation was applied to degrade DEP and BPA, showing that solution pH played a key role in determining reactive species. DEP and BPA were more favorably degraded at more alkaline conditions with higher utilization efficiency of SO32-. The study proposed possible transformation mechanisms of S(IV) and mineralization routes of both pollutants.
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
Xuguang Li, Le Wang, Yanxiu Guo, Wen Song, Yanfei Li, Liangguo Yan
Summary: MoS2-based materials have shown potential as PMS activators for tetracycline removal. The goethite-MoS2 hybrids (G-MoS2) exhibited higher degradation rate than pure MoS2. The study also revealed that (OH)-O-center dot played a significant role in TC removal in the 0.1G-MoS2/PMS system.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Lei Wang, Boqiang Li, Dionysios D. Dionysiou, Baiyang Chen, Jie Yang, Juan Li
Summary: The study found that alcohols have an impact on the reliability of ·OH detection, possibly making the traditional ·OH determination method unreliable or misleading. Through careful investigation, an overlooked reaction pathway during H2O2 and ·OH transformations was revealed, showing that varying oxygen concentrations, pHs, alcohol dosages, and types can affect H2O2 formation, which in turn affects the accuracy of ·OH determination.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Chenglong Yu, Yuxi Lu, Yanting Zhang, Ao Qian, Peng Zhang, Man Tong, Songhu Yuan
Summary: This study investigated the production of hydroxyl radicals (.OH) from solid humic acid during oxidation. The results demonstrated that solid humic acid transferred electrons to oxygen, leading to the generation of .OH. The modeling results also confirmed that reduced solid organic matter played a significant role in .OH production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Qian Fu, Yi Mu, Lixia Yang, Yi Mei, Meifeng Wu, Jian-Ping Zou, Dionysios D. Dionysiou, Shenglian Luo
Summary: In this study, beta-FeC2O4.2H2O was used to activate molecular oxygen and generate abundant hydroxyl radicals for efficient degradation of toxic Microcystin-LR. The electron utilization efficiency of beta-FeC2O4.2H2O towards hydroxyl radicals is high, ensuring a sustainable hydroxyl radical stream. The method is cost-effective, highly effectual, and environmentally benign, making it promising for large-scale application in water treatment.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Haoran Yu, Danxu Liu, Hengyi Wang, Haishuang Yu, Qingyun Yan, Jiahui Ji, Jinlong Zhang, Mingyang Xing
Summary: In recent years, there have been numerous studies on the Fenton or Fenton-like reactions mediated by nonfree radicals such as singlet oxygen (1O2). However, there are few studies on the synergistic effect of 1O2 and free radicals on the degradation of organic molecules in the Fenton reaction. This study constructs a CoP/Fe2+/AM1.5 system and demonstrates the controllable formation of surface 1O2 and center dot OHads through the oxidation and reduction centers on the CoP surface. The synergistic effect between 1O2 and the surface-adsorbed center dot OHads leads to the degradation of phenol.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Sihyeon Jo, Hyejin Kim, Kyoung Eun Lee, Sukhwa Hong, Kangwoo Cho, Sanghoon Kim, Gun-hee Moon, Jonghun Lim
Summary: The selective control of reactive oxygen species (ROS) is crucial in abating aquatic organic pollutants in advanced oxidation processes (AOPs). Copper phosphide (CuxP) exhibits a Janus-like behavior, serving as a solid oxidative reagent under acidic and dark conditions and as a photosensitizer under neutral and light conditions. This dual nature of CuxP allows for the selective production of ROS and offers new possibilities for water treatment and the development of efficient AOP systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
