Article
Engineering, Environmental
Yingying Zhou, Zhao-Xi Ye, Huang Huang, Yong Dong Liu, Rugang Zhong
Summary: This study investigated the formation mechanism of chloropicrin during chlorination using a combined computational and experimental approach. The research found that primary amines and free amino acids primarily contribute to the formation pathway of chloropicrin. Additionally, the elimination of hydrochloric acid from N,N-dichloro-amine and electrophilic addition of N-chloroalkylimide with hypochlorous acid were identified as the rate-limiting steps. Furthermore, 2-nitroethanol and N-methylhydroxylamine were proposed as potent chloropicrin precursors with the highest chloropicrin yields in the chlorination process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Xiaoqing Lin, Canming Ma, Deli Wu
Summary: This study reveals that Cu(II)-enhanced ozonation greatly promotes the decay of fatty amines by enhancing direct ozone oxidation. Trace Cu(II) amplifies the observed rate constants of dimethylamine and trimethylamine. The formation of center dot OH and O2 center dot- is inhibited rather than promoted, and the enhanced effect of trace Cu(II) is exhibited in both single and complex malodorous compounds.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Organic
Chuanling Chen, Chengrong Lu, Bei Zhao
Summary: This study presents a new catalyst for the reaction of HBPin with nitro compounds, resulting in high yields of N-borylamines. The derivatives of N-borylamines were also obtained through a sequential one-pot method. Moreover, kinetic studies of the reaction were conducted.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Environmental Sciences
Hengqing Shen, Yuhong Liu, Min Zhao, Juan Li, Yingnan Zhang, Juan Yang, Ying Jiang, Tianshu Chen, Miao Chen, Xianbing Huang, Chengliu Li, Danling Guo, Xiaoyan Sun, Likun Xue, Wenxing Wang
Summary: Carbonyl compounds were found to play a significant role in both the primary formation and recycling of ROx radicals in the formation of ozone in an urban site in Shantou, China. The concentrations of HO2 and RO2 were mainly affected by the seven measured carbonyls, contributing to a large portion of the peak net O3 production rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Microbiology
Yang Sun, Rong Zeng, Wensheng Fang, Jvling Hua, Shuijin Huang, Qiuxia Wang, Aocheng Cao, Feng Zhu, Haiyan Zhang
Summary: This study investigates the effects of chloropicrin soil fumigation on soil potassium conversion and plant uptake, and identifies the mechanisms involved. Results show that chloropicrin fumigation decreases rapidly available potassium and available potassium in soil, but increases potassium content in tomatoes. Fumigation also alters soil microbial communities and decreases microbial diversity, resulting in changes in potassium dissolution and plant growth contribution.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Environmental Sciences
Christian Mark Garcia Salvador, Rongzhi Tang, Michael Priestley, Linjie Li, Epameinondas Tsiligiannis, Michael Le Breton, Wenfei Zhu, Limin Zeng, Hui Wang, Ying Yu, Min Hu, Song Guo, Mattias Hallquist
Summary: Nitro-aromatic compounds (NACs) were measured hourly in a rural site in China during wintertime. The study found that NACs may significantly contribute to the radiative forcing effects of atmospheric particles. Additionally, gas-phase NAC levels were highest during the daytime, and regional secondary processes played a significant role in NAC concentrations.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Environmental Sciences
Junjie Wang, Zhigang Li, Shaoyang Hu, Jian Ma, Tingting Gong, Qiming Xian
Summary: This study investigated the formation of chloro-nitromethanes during chlorination and chloramination of nitro-aromatic compounds, revealing 2-nitrophenol and 3-nitrophenol as main precursors. Chlorination led to higher HNMs formation compared to chloramination, while ferric and manganese ions had different impacts on TCNM formation. Nitrite was found to significantly reduce TCNM formation, indicating different effects on TCNM formation from different precursors. Additionally, dissolved organic matter significantly influenced TCNM formation in chlorination of 2-nitrophenol, despite low TCNM formation in chlorination of DOM.
Article
Chemistry, Analytical
Shamsunnahar Suchana, Langping Wu, Elodie Passeport
Summary: Compound-specific isotope analysis (CSIA) is a useful tool for studying the fate of legacy groundwater contaminants, but its application to nonconventional contaminants is still emerging. This study validated CSIA methods for nitro- and amino-substituted chlorobenzenes and developed a solid-phase extraction (SPE) method to minimize matrix interferences. The results showed that the SPE-CSIA procedure had negligible isotope fractionation and can be used to track the environmental fate of these contaminants.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Sara Sobhani, Hadis Hosseini Moghadam, Seyed Ruhollah Derakhshan, Jose Miguel Sansano
Summary: This study developed a direct imination reaction by tandem reaction of alcohols and nitro compounds using Cu-isatin Schiff base-gamma-Fe2O3 as a nanomagnetically recyclable catalyst under solvent-free conditions. The method allows various imines to be prepared in good yields from one-pot reaction of different alcohols and nitro compounds, with the advantages of using an inexpensive and easily reusable catalyst, without requiring additives or excess amounts of benzyl alcohol as the reaction solvent.
Article
Chemistry, Multidisciplinary
Satenik Mkrtchyan, Vishal B. Purohit, Sehrish Sarfaraz, Muhammad Yar, Khurshid Ayub, Viktor O. Iaroshenko
Summary: This protocol presents a metal-free supramolecular reduction method utilizing blue light (390 nm) to drive the reduction of nitroarenes into a cucurbit[7]-uril (CB[7]) cavity. The reaction was conducted using a mixture of aqueous sodium chloride and dichloromethane as the reaction media, resulting in the formation of various substituted anilines with high yields. The mechanism of this transformation was simulated using the DFT method.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Environmental Sciences
Mohd Faizul Hilmi Zulkifli, Nor Syamimi Sufiera Limi Hawari, Mohd Talib Latif, Haris Hafizal Abd Hamid, Anis Asma Ahmad Mohtar, Wan Mohd Razi Wan Idris, Nur Ili Hamizah Mustaffa, Liew Juneng
Summary: This study aims to determine the trends of volatile organic compound (VOC) concentrations and their potential contribution to O3 formation. The results showed that Cheras had the highest VOC concentrations, followed by Shah Alam and Seremban. Alkenes and aromatic hydrocarbons were identified as the major contributors to O3 formation.
Article
Chemistry, Multidisciplinary
Shilei Yang, Min He, Yi Wang, Ming Bao, Xiaoqiang Yu
Summary: An efficient visible-light-induced iron-catalyzed reduction of nitroarenes to anilines proceeds with photosensitizer-free conditions, and features good to excellent yields and broad functional group tolerance. Preliminary mechanistic investigations showed that this reaction was conducted via ligand-to-metal (NEM to Fe3+) charge transfer and nitro triplet biradical-induced hydrogen atom transfer processes.
CHEMICAL COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Maria Luisa Mendoza-Magana, Hugo Alejandro Espinoza-Gutierrez, Sendar Daniel Nery-Flores, Abraham Alberto Ramirez-Mendoza, Cesar Ricardo Cortez-Alvarez, Robert de Mario Bonnet-Lemus, Mario Alberto Ramirez-Herrera
Summary: The study found that curcumin, when administrated preventatively through diet, effectively reduces neurodegeneration and nitro-oxidative damage caused by O-3 exposure. Furthermore, curcumin also decreased oxidative damage to plasma lipids and proteins in the experimental rats.
Article
Chemistry, Physical
Mingming Hao, Zhaohui Li
Summary: Pd@NH2-UiO-66(Zr) composite material, obtained through a double-solvent impregnation and photoreduction process, demonstrates superior activity in visible light initiated reactions. This study provides an efficient and green strategy for the production of secondary amines and highlights the great potential of using M/MOFs nano-composites as multifunctional catalysts for light induced one-pot tandem reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Environmental Sciences
Rumei Li, Yulong Yan, Lin Peng, Fangyuan Wang, Xingcheng Lu, Yuhang Wang, Yang Xu, Cheng Wang
Summary: In traditional industrial city Taiyuan in northern China, studies have shown that vehicular emissions have a higher contribution to O-3 formation compared to coal combustion, with alkenes being a key factor. Joint prevention and control of multiple sources, especially vehicular emissions and industrial processes emissions, can effectively reduce summertime O-3 pollution in Taiyuan.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Engineering, Environmental
Yi-Hsueh Chuang, Aleksandra Szczuka, William A. Mitch
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Hooman Vatankhah, Aleksandra Szczuka, William A. Mitch, Nohemi Almaraz, Jacob Brannum, Christopher Bellona
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Aleksandra Szczuka, Juliana P. Berglund-Brown, Hannah K. Chen, Amanda N. Quay, William A. Mitch
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Zhong Zhang, Yi-Hsueh Chuang, Nan Huang, William A. Mitch
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Jiaming Lily Shi, Daniel L. McCurry
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Lap-Cuong Hua, Euna Kim, Daniel L. McCurry, Chihpin Huang, William A. Mitch
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2020)
Article
Environmental Sciences
Amanda N. Quay, Amanda S. Hering, Meagan S. Mauter
ENVIRONMENTAL RESEARCH LETTERS
(2020)
Article
Engineering, Environmental
Jong Kwon Choe, Lap-Cuong Hua, Yukako Komaki, Adam M-A Simpson, Daniel L. McCurry, William A. Mitch
Summary: The reactivity of histidine towards chlorine transformation products is lower compared to other chlorine-reactive amino acids, with chlorine preferentially targeting tyrosine and other more reactive amino acids. Over short time scales, the more reactive amino acids may contribute more to structural modifications to proteins. Over longer time scales, beta-cyanoalanine is identified as the dominant transformation product of chlorine reactions with peptide-bound histidine.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Jiaming Lily Shi, Sophia L. Plata, Marco Kleimans, Amy E. Childress, Daniel L. McCurry
Summary: Nitromethane is poorly removed by reverse osmosis and ultraviolet/advanced oxidation processes in water reuse treatment trains, but can be effectively removed by biological activated carbon. Its ubiquitous formation during wastewater ozonation and facile conversion into genotoxic halonitromethanes upon chlorine addition present a unique hazard to direct potable reuse systems.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Moustapha Harb, Ali Zarei-Baygi, Phillip Wang, Christelle BouNehme Sawaya, L. Daniel McCurry, B. Lauren Stadler, L. Adam Smith
Summary: This study investigated the transformation of antibiotics in anaerobic membrane bioreactor (AnMBR) and identified microbial communities that may facilitate the conversion of sulfamethoxazole and ampicillin. The relative activity of suspended biomass in the system shifted towards syntrophic groups during the experiment, showing notable differences from membrane biofilm communities. The high activity of specific methanogenic, syntrophic, and sulfate-reducing groups in membrane-attached biofilms likely contributes to the biotransformation of antibiotics.
ENVIRONMENTAL RESEARCH
(2021)
Review
Engineering, Environmental
Sungeun Lim, Jiaming Lily Shi, Urs von Gunten, Daniel L. McCurry
Summary: Ozonation has a long history in water treatment and has been used for disinfection and oxidation of pollutants. In recent years, it has been increasingly applied for enhanced municipal wastewater treatment and water reuse. The research on ozonation has contributed to a better understanding of the removal efficiency of organic contaminants and the formation of transformation products.
Article
Engineering, Environmental
Euna Kim, Georgia B. Cardosa, Katarina E. Stanley, Travis J. Williams, Daniel L. McCurry
Summary: Water reuse is expanding due to water scarcity, but recent research has found that low-molecular-weight aldehydes still make up a significant fraction of recycled wastewater in certain treatment configurations.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Euna Kim, Olivia M. Driessen, Daniel L. McCurry, John D. Sivey
Summary: Well-organized virtual group meetings in academic research laboratories can enhance teamwork, academic exchange, and provide professional development guidance and support for individuals.
ENVIRONMENTAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Environmental
Yi-Hsueh Chuang, Farzaneh Shabani, Joline Munoz, Roshanak Aflaki, Slavica D. Hammond, William A. Mitch
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2019)