Article
Engineering, Chemical
Jingjing Yao, Jiayi Wen, Haipu Li, Ying Yang, Hui Ying Yang
Summary: The complexation of tetracyclines with Fe species plays a significant role in the removal of tetracyclines by ferrate. Experimental results show that the complexation of tetracyclines with Fe3+ contributes to 79% of the overall removal, followed by oxidation (11%) and adsorption/flocculation (10%). Thermodynamic and kinetic calculations suggest that complexation reactions between Fe3+ and tetracyclines are more likely to occur than oxidation reactions between ferrate and hydroxyl radicals. The complexation rates of tetracyclines with Fe3+ determine the removal of multiple tetracyclines by ferrate, highlighting the importance of considering complexation in the removal of pollutants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Run Yuan, Yu Xia, Xu Wu, Can He, Yihe Qin, Changjun He, Xuewei Zhang, Na Li, Xuwen He
Summary: This study presents a new O-3/H2O2/Fe-shavings process for the treatment of coking wastewater secondary biochemical effluent (CWSBE). By optimizing the parameters, this process effectively removes organic pollutants, enabling the treated wastewater to meet the relevant discharge standards.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Fukang Zheng, Yanhui Cheng, Huiyu Dong, Lei Sun, Fei Pan, Xiangjuan Yuan
Summary: An emerging advanced oxidation process, ozone/peracetic acid (O3/PAA), was investigated for the abatement of atrazine (ATZ). The results showed that the O3/PAA process exhibited outstanding performance in degrading ATZ with high removal efficiency. The dosage of PAA and solution pH significantly affected the degradation performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Mengmeng Xu, Suding Yan, Simei Sun, Zhiran Ni, Wenzhong Wu, Jingyu Sun
Summary: This study investigated the mechanism, kinetics, and toxicity of insect repellent DEET in water environment using quantum chemical calculations. The results showed that the degradation of DEET initiated by •OH and SO4• from advanced oxidation processes had good performance. The degradation of DEET was mainly caused by hydrogen abstraction and addition.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Miao Gong, Mengqi Wang, Linlu Wang, Aixin Feng, Jinxiang Hu
Summary: In this study, supercritical water gasification and supercritical water oxidation were used to treat tetracycline hydrochloride (TC). The results showed that increasing temperature, extending reaction time, and decreasing initial concentration had positive impacts on TC removal. The addition of H2O2 significantly improved the degradation efficiency of TC and increased the thoroughness of the degradation process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Shunqi Dong, Yongze Liu, Li Feng, Liqiu Zhang
Summary: This study evaluated the oxidation of three pyrazolone pharmaceuticals by peracetic acid (PAA) and investigated the degradation kinetics of one of the pharmaceuticals, Aminopyrine (AMP). The results showed that PAA exhibited structure selectivity and highest reactivity towards AMP. Kinetic simulations revealed the rate constants for the reactions between AMP and PAA, and confirmed that PAA oxidized AMP via electrophilic attack. The degradation pathways of AMP during PAA oxidation were determined.
Article
Engineering, Environmental
Julia Wolters, Muhammad Usman, Johanna Mathiae, Dirk Dirichs, Daniel Bastian, Benedikt Aumeier, Carsten Bolm, Volker Linnemann, Thomas Wintgens
Summary: This study examined the application of the TACN-Mn catalyst in environmentally relevant conditions and investigated the degradation of two micropollutants in different water matrices. The results showed that the catalyst effectively degraded the micropollutants, but at a lower rate in wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Congwei Luo, Shishun Wang, Daoji Wu, Xiaoxiang Cheng, Huixue Ren
Summary: This study investigated the degradation kinetics of Methylene blue (MB) and the formation of nitrated/nitrosated products during wastewater treatment using UV/NO3-. The results showed that MB removal efficiency was higher under acidic conditions due to the higher concentration of hydroxyl radicals. The study also found that nitrated/nitrosated products were likely produced by coupling reactions and electrophilic addition.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Chemistry, Physical
Soliu Oladejo Ganiyu, Carlos A. Martinez-Huitle, Mehmet A. Oturan
Summary: The knowledge of electrochemical advanced oxidation processes (EAOPs) mechanisms has evolved over the past three decades, aided by advances in analytical and spectrometric techniques. The type, nature, and quantity of reactive species generated in EAOPs are controlled by various factors, and their accurate identification is crucial for understanding their reactivity. The potency and reactivity of oxidants generated in EAOPs are similar regardless of the technique used, except in the case of heterogeneous and homogeneous hydroxyl radicals.
CURRENT OPINION IN ELECTROCHEMISTRY
(2021)
Article
Chemistry, Physical
Xiaotian Liu, Yuran Yang, Feng Duan, Jinyu Wen, Xijun Wei, Yujie Huang, Bi Jia, Gaili Ke, Huichao He, Yong Zhou
Summary: An alkaline electro-Fenton process has been proposed in this study, which involves the synthesis of H2O2 in KHCO3 electrolyte using an In2O3 film anode and activation of H2O2 into OH via MnO2 powder, aiming to effectively treat alkaline organic wastewater.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yanlong Sun, Yu Li, Jianmin Zhan, Aiqi Feng, Chengzhi Zhou, Jianrong Chen
Summary: This study investigated the impact of four anions on the degradation of SMX by PMS, showing that the anions enhance the degradation efficiency. The anions participate in the two stages of SMX degradation and can reduce the ecological risk of toxic byproducts to the environment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Shuo Li, Yanan Wu, Heshan Zheng, Hongbin Li, Yongjie Zheng, Jun Nan, Jun Ma, Dillirani Nagarajan, Jo-Shu Chang
Summary: Antibiotic contamination poses serious risks of ecotoxicity and resistance gene induction. Advanced oxidation processes (AOPs) have demonstrated effectiveness in the degradation of antibiotics. However, the production of degradation intermediates in the oxidation process raises concerns about potential ecological risks. In-depth investigations on the ecotoxicity and resistance genes induction of antibiotic degradation products are important for addressing the environmental problems of antibiotics.
Article
Environmental Sciences
Yu Duan, Wei Zhou, Haiyang Shao, Zhibo Zhang, Wenyan Shi, Gang Xu
Summary: In this study, electron beam irradiation was used to degrade indomethacin (IDM) in aqueous solution, and the main degradation pathways of IDM were found to be under the actions of oxidative and reductive radicals. The degradation effect was influenced by the presence of NO3-, NO2-, CO32-, HCO3-, SO2-, and humic acid.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Applied
Xiaohan Wu, Qianwei Lin, Tarun Belwal, Hao Huang, Ligen Zou, Weide Lv, Zisheng Luo
Summary: The study found that the degradation rate of Cyanidin-3-O-glucoside (C3G) was significantly higher under sonophotolysis compared to individual ultrasonics or ultraviolet light photolysis. Additionally, the addition of gallic acid can reduce the degradation of C3G under high-intensity ultraviolet light and ultrasonics, making it more suitable for application in food processing.
Article
Engineering, Environmental
Ke Feng, Shiqi Mu, Jie Bai, Qibin Li
Summary: The study investigated the use of a microwave-enhanced Fe-C/H2O2 process for advanced treatment of biologically treated effluent, showing better removal of organic matter compared to other processes. Three-dimensional excitation and emission matrix (3D-EEM) fluorescence spectra demonstrated significant reduction in molecular condensation and molecular weight of dissolved organic matter, with humus largely destroyed and mineralized. The presence of zero-valent iron (Fe-0) and iron oxides in iron-carbon materials allowed for enhanced Fenton reactions with H2O2, further accelerated by MW radiation as an external energy source to remove organic matter from the effluent of a SAARB.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)