Article
Environmental Sciences
Xiao-Yu Lin, Shi-Yong Xia, Yao Luo, Heng-Xiao Han, Ling-Yan He
Summary: In recent years, the concentration of ozone (O3) in typical urban agglomerations in China has generally increased. This study conducted a three-year observation in Shenzhen, a megacity in the Pearl River Delta, and identified the major factors influencing the ozone concentration using Principal Coordinate Analysis (PCoA) and Stepwise Multiple Linear Regression (MLR) fitting equation. The result showed that temperature, photolysis rates, relative humidity, and PM2.5 all play significant roles in the formation of ozone.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Yuqin Mao, Shengqi Qi, Xianfen Guo, Hongwei Yang, Yuefeng F. Xie
Summary: The study used batch experiments and a numerical model to determine the optimal dosage and ratio of ozone in water treatment plants for increasing ozone absorption and utilization rates. Ozone absorption rate was minimally affected by water quality, while ozone utilization rate was closely related to water quality, with faster-consuming waters requiring equal ozone dosing in all three aeration parts for maximum utilization rate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Valentin Rouge, Pham Thi Thai Ha Nguyen, Sebastien Allard, Yunho Lee
Summary: This study investigates the reaction kinetics and products of ferrate (Fe(VI)) with primary amines, specifically amino acids. A new kinetic model involving ionizable intermediates is proposed to explain the unusual pH effect on the reactivity of Fe(VI) towards primary amines and amino acids. The study finds that the product distribution for amino acids differs significantly from that of uncarboxylated primary amines, with amino acids producing multiple products while primary amines mainly produce nitriles.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
A. Tsikritea, K. Park, P. Bertier, J. Loreau, T. P. Softley, B. R. Heazlewood
Summary: This study examines charge transfer reactions between two isotopologues of ammonia, NH3 and ND3, and two rare gas ions, Kr+ and Ar+, revealing an inverse kinetic isotope effect and limitations of capture theory models. The reactant and product potential energy surfaces constructed from high-level ab initio calculations show no energetically-accessible crossing points. Through a one-dimensional quantum-mechanical model, a possible explanation for the presence of inverse kinetic isotope effects in these systems is proposed.
Article
Engineering, Environmental
Hyungyu Lee, Sanghoo Park, Joo Young Park, Jinwoo Kim, Wonho Choe
Summary: We numerically demonstrate that photolytic processes induced by external UV sources significantly affect the chemical properties of plasma-water systems. Exposure of plasma-treated water (PTW) to UV leads to the photolysis of long-lived species and the formation of hydroxyl radical (OH) and nitric oxide (NO). The concentration of OH and NO in PTW is greatly enhanced under UV exposure, making it an attractive approach to increase the reactivity and applicability of PTW.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Francisco J. Real, Juan L. Acero, F. Javier Benitez, Esther Matamoros
Summary: This study investigates the elimination of neonicotinoid insecticides in water through ozone-based oxidation treatments. It is found that certain neonicotinoids can be partially degraded by ozone, with the degradation efficiency depending on the pH value and water constituents. Furthermore, advanced oxidation processes combining ozone with hydrogen peroxide or activated carbon show better performance in neonicotinoid removal compared to ozone alone.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Teresa A. Gawargy, Bowen Wang, Juan C. Scaiano
Summary: The photolysis of vanillin generates a short-lived triplet state and free radicals, leading to its degradation and yellowing of acetonitrile solutions. Laser flash photolysis studies show a triplet absorbing at 390 nm, quenched by naphthalenes, conjugated dienes and oxygen, and also reveal vanillin as a good singlet oxygen sensitizer with characteristic NIR emission at 1270 nm.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2022)
Article
Environmental Sciences
Ruijun Dang, Daniel J. Jacob, Viral Shah, Sebastian D. Eastham, Thibaud M. Fritz, Loretta J. Mickley, Tianjia Liu, Yi Wang, Jun Wang
Summary: Satellite measurements of tropospheric nitrogen dioxide (NO2) have been widely used to track anthropogenic NOx emissions, but the interpretation can be complicated due to the influence of the free tropospheric NO2 background. The study used a chemical transport model to better understand the sources and trends of background NO2 over the contiguous US (CONUS) and found that accounting for aerosol nitrate photolysis corrected the previous model underestimate of the background. Additionally, the increase in aircraft NOx emissions and contribution from wildfires were identified as important factors in the interpretation of satellite NO2 trends.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Xiaohu Xu, Jun Li
Summary: Chemical reaction dynamics requires the collaboration of both experiment and theory. With the help of machine learning, an accurate potential energy surface (PES) for the reaction between Cl + SiH4 has been developed. This PES successfully describes both the hydrogen abstraction channel and the hydrogen substitution channel, revealing detailed dynamics of the latter. Theoretical and experimental results suggest that the substitution channel mainly occurs through the typical S(N)2 inversion mechanism.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Review
Environmental Sciences
Muyan Wu, Haibao Huang, Dennis Y. C. Leung
Summary: This review summarizes recent studies on the use of VUV catalytic oxidation for degrading VOCs. All the processes involved in VUV catalytic oxidation and their combinations have been reviewed, and the principles and strategies of catalyst development and mechanistic studies for VOCs degradation are summarized. Two directions for prospective future work are also proposed.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Claudio M. Nunes, Jose P. L. Roque, Srinivas Doddipatla, Samuel A. Wood, Robert J. McMahon, Rui Fausto
Summary: This study presents a new example of chemical reactivity governed by quantum tunneling and highlights the limitations of classical theories. The different conformers of a 2-formylphenylnitrene underwent spontaneous rearrangement to different products, and the kinetics measurements provided evidence of concomitant tunneling reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Environmental Sciences
Yuliya E. Tyutereva, Vyacheslav P. Grivin, Jing Xu, Feng Wu, Victor F. Plyusnin, Ivan P. Pozdnyakov
Summary: This study introduces a new method to determine the reaction rate constants of hydroxyl radicals by utilizing UVA laser flash photolysis technique and a specific probe substance. The approach allows for measurement of compounds that do not generate optically detectable transient species in reactions with hydroxyl radicals.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Koushik Mondal, Balla Rajakumar
Summary: This study investigates the kinetics of the reactions between formyl radicals (HCO) and ethyl formate (EF) and ethyl acetate (EA). The results show that the reaction between HCO and EA is faster, possibly due to the greater stability of the formed radical intermediate.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Engineering, Environmental
Shifa Zhong, Yanping Zhang, Huichun Zhang
Summary: The study demonstrated the effectiveness of combining small, similar data sets and transferring knowledge between them to improve the predictive performance of machine learning models.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Sebastien Thomas, Nicole Blin-Simiand, Michel Heninger, Pascal Jeanney, Joel Lemaire, Lionel Magne, Helene Mestdagh, Stephane Pasquiers, Essyllt Louarn
Summary: This study used a non-filamentous discharge and a mass spectrometer to investigate the decomposition of acetone in N-2/O-2 gas mixtures. It was found that the presence of oxygen significantly decreased acetone degradation and resulted in a tremendous change in the distribution of by-products.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Engineering, Environmental
Guoying Gao, Jing Kang, Jimin Shen, Zhonglin Chen, Wei Chu
OZONE-SCIENCE & ENGINEERING
(2017)
Article
Environmental Sciences
Shengyan Pu, Hui Ma, Anatoly Zinchenko, Wei Chu
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2017)
Article
Chemistry, Physical
Jinhua Zhang, Caihua Zhang, Gaoling Wei, Ying Li, Xiaoliang Liang, Wei Chu, Hongping He, Deyin Huang, Jianxi Zhu, Runliang Zhu
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2017)
Article
Engineering, Environmental
Meijuan Chen, Jie Yao, Yu Huang, Han Gong, Wei Chu
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Engineering, Chemical
Hiu-Lam So, Koon-Yee Lin, Wei Chu, Han Gong
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Environmental Sciences
Zeng-Hui Diao, Fu-Xin Dong, Liu Yan, Zhi-Liang Chen, Peng-Ran Guo, Xiao-Jie Xia, Wei Chu
Summary: This study investigates the applicability of sludge biochar catalyst (SBC) coupling with ultrasound (US) for the simultaneous removal of Pb(II) and phenol. Results show that the SBC/US process has a superior removal performance for Pb(II) compared to SBC without US, and can also remove coexisting metal ions along with Pb(II). The synergistic removal of Pb(II) and phenol by SBC/US process involves adsorption, precipitation, reduction, and Fenton-like oxidation processes.
Article
Engineering, Environmental
Tao Li, Amal Abdelhaleem, Wei Chu, Weicheng Xu
Summary: The study demonstrated that the pyrite/oxone process is an efficient method for the degradation of propanil, with more than 90% decay achieved within 15 minutes. The generated SO4- and OH were found to be the dominant reactive radicals, with optimal reaction pH values observed at pH 9.1 and pH 2.9. The Fe(II) regeneration and sulfur conversion play important roles in the oxone activation mechanism. Co-existing natural water constituents have differing effects on the pyrite/oxone process, and the process shows promise for organic compound removal in water.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xiaoxiao Zhang, Jimin Shen, Xiaoyu Huo, Jianwei Li, Yaoyu Zhou, Jing Kang, Zhonglin Chen, Wei Chu, Shengxin Zhao, Lanbo Bi, Xiaotong Xu, Binyuan Wang
Summary: In this study, raw water, settled water, and filtered water from a drinking water treatment plant were fractionated into 24 natural organic matter fractions with varying properties. The disinfection byproducts obtained during chlorination of these NOM fractions were explored, with a focus on hydrophobic DBP precursors. The results indicated that certain molecular weight fractions and hydrophobic compounds in raw water dominated the production of DBP precursors.
Review
Chemistry, Inorganic & Nuclear
Longbo Jiang, Jinjuan Yang, Shaoyu Zhou, Hanbo Yu, Jie Liang, Wei Chu, Hui Li, Hou Wang, Zhibin Wu, Xingzhong Yuan
Summary: In order to enhance the efficiency of g-C3N4 photocatalysts under solar light (UV about 5%, visible light about 43%, NIR light about 52%), recent progress of NIR-driven g-C3N4 based photocatalysts has been reviewed. Various strategies have been summarized to broaden the light absorption of g-C3N4 to NIR light region, and the diverse photocatalytic applications of NIR-driven g-C3N4 photocatalysts have been outlined.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Environmental Sciences
Yanlin Zhang, Wei Chu
Summary: This study utilized a photocatalyst composed of Zn-TiO2 and Cu-TiO2 to activate persulfate for Bisphenol S degradation, showing a significant synergistic effect between the two catalysts. The combination of Zn-TiO2 and Cu-TiO2 resulted in a 100% removal rate of BPS in 18 minutes, outperforming the individual catalysts. The generation of superoxide radicals and the redox cycles of Cu (II)/Cu(I) were identified as the mechanisms behind the synergistic effect, offering a new and effective approach for improving reaction efficiency in wastewater treatment applications.
Article
Green & Sustainable Science & Technology
Zeng-Hui Diao, Shi-Ting Huang, Xie Chen, Meng-Yao Zou, Hui Liu, Peng-Ran Guo, Ling-Jun Kong, Wei Chu
Summary: The use of PMS and calcium-based Ag3PO4 composite under visible light irradiation for the degradation of antibiotic NOF showed high efficiency in removal, while also being able to simultaneously remove heavy metals and organic compounds.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biotechnology & Applied Microbiology
Liu Yan, Fu-Xin Dong, Xi Lin, Xin-Hua Zhou, Ling-Jun Kong, Wei Chu, Zeng-Hui Diao
Summary: The biochar-iron composite (FBC) showed high adsorption efficiency for Cr(VI) and MG in mixed systems, providing a new approach for treating wastewater contaminated with Cr(VI) and MG.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Yanlin Zhang, Wei Chu
Summary: In this study, a Fe3+/g-C3N4 hybrid catalyst system showed a synergistic effect in the photocatalytic degradation of metronidazole (MNZ) by activating peroxymonosulfate (PMS). The continuous regeneration of Fe2+ through electron transfer from photo-activated g-C3N4 to Fe3+ ensures the non-stopping production of radicals for MNZ degradation under visible light. The study also examined the effects of various operation parameters on the degradation process.
Article
Green & Sustainable Science & Technology
Amal Abdelhaleem, Hani Nasser Abdelhamid, Mona G. Ibrahim, Wei Chu
Summary: The study utilized a copper-based metal-organic framework-derived catalyst for the photodegradation of paracetamol, observing a unique enhancement effect at extreme pH 9.9 and identifying two new substances among eight intermediates.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Han Gong, Wei Chu, So Hiu Lam, Angela Yu-Chen Lin
