Article
Environmental Sciences
Xiaoqing Wu, Qifeng Hou, Jiabin Huang, Jiajue Chai, Feng Zhang
Summary: In this study, the reaction kinetics of styrene + OH were extensively studied using high-level quantum chemical methods combined with RRKM/master equation simulations. The total rate coefficient for styrene + OH was calculated to be 1.7 x 10-11 cm3 molecule-1 s-1 at 300 K, 1 atm. The main products were identified as add beta (88.2%), add5 (6.9%), add alpha (1.9%) and add3 (1.7%), with an estimated atmospheric lifetime of 8.0 hours for styrene.
Article
Engineering, Environmental
Paulo C. Alarcon, Zoran Kitanovski, Mohsen Padervand, Ulrich Poeschl, Gerhard Lammel, Cornelius Zetzsch
Summary: Research shows that the photochemical degradation of Endosulfan in the atmosphere is slower than its biodegradation in soil or water, leading to an underestimation of its environmental lifetime. The lifetimes of soil and aquatic systems, particularly in temperate and warm climates, should be reevaluated.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhichao Yang, Chao Shan, Joseph J. Pignatello, Bingcai Pan
Summary: Mn(II) was found to accelerate the Fenton reaction by participating directly and catalytically in the Fe(III)/Fe(II) redox cycle in the presence of picolinic acid (PICA) as an assisting agent. Mn(II) accelerated Fe(III) reduction, superoxide radical formation, and hydroxyl radical formation, but the proposed Mn(II/III)-H2O2 redox cycle was shown to be insignificant. Instead, Mn(II) initially complexes with a ferric hydroperoxo species, followed by intramolecular electron transfer to give Fe(II) and MnO2+. This scheme can be applied to other Fenton-type systems. These findings will be valuable for the design of practical and sustainable Fenton-based advanced oxidation processes (AOPs) using Mn(II) in combination with chelating agents.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Carlos H. M. Fernandes, Bianca F. Silva, Jose M. Aquino
Summary: This study investigated two different advanced oxidation processes (AOP) for treating water contaminated with emerging contaminants. The results showed that both electrochemical methods and solar-based methods were effective in oxidizing and mineralizing the contaminants.
Article
Engineering, Environmental
Klara Rusevova Crincoli, Scott G. Huling
Summary: For the first time, the fate of radicals in heterogeneous chemical oxidation treatment systems was studied, with UV-AHP and UV-APS generating center dot OH and SO4 center dot- radicals that impact treatment efficiency. The higher scavenging rates of center dot OH by alumina and aqueous/solid phase constituents, compared to SO4 center dot-, contributed to lower treatment efficiency in the UV-AHP system. The cost assessment based on overall treatment efficiency showed higher specific cost for treating the probe compound with UV-AHP due to its lower treatment efficiency compared to UV-APS.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Snigdha Khuntia, Manish Kumar Sinha, Parveen Dalal, Arunima Singh
Summary: The combination of ozone and UV irradiation in aqueous mode has been investigated for removing SO2 and NOX. Various combinations of ozone, flue gas, and UV irradiation power were attempted to achieve complete removal of flue gases. The amount of hydroxyl radicals generated by UV and O3 combination was measured. A comprehensive comparison of the contribution of oxidants such as ozone, UV, and hydroxyl radicals was depicted. To reduce power consumption, it is important to find a suitable route, which has been achieved by changing the operation mode of gases, resulting in over 95% NOX and almost 100% SO2 removal.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Yufan Chen, Christopher J. Miller, Jieli Xie, T. David Waite
Summary: In this study, it was found that the oxidation products of methyl phenyl sulfoxide (PMSO) enhance the formation of methyl phenyl sulfone (PMSO2) by complexing with Fe(III) species. This finding suggests caution in using PMSO to investigate the role of ferryl ion ([(FeO)-O-IV](2+)) in iron-based advanced oxidation processes (AOPs). Additionally, other target compounds were found to modify the reactivity of iron species through complexation and/or redox reactions. Overall, this study highlights the confounding effects of aromatic probe compounds on the reactivity of iron species in AOPs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Meng Li, Yu-Ting Jin, Dan-Yang Cao, Ling-Ling Yang, Jian-Fang Yan, Zhao-Xin Zhang, Zhang Liu, Long-Wei Huang, Shao-Qi Zhou, Ji-Liang Cheng, Qinglan Zhao, Hai-Ming Zhao, Nai-Xian Feng, Ce-Hui Mo
Summary: The study demonstrates that efficient degradation of PFOS can be achieved through D-Ce/Sb2O3 anode, with electron transfer and generation of hydroxyl radicals playing crucial roles. The Ce-O active sites can reduce the electron and hydroxyl radical migration distance, enhancing catalytic activity.
Article
Thermodynamics
Binod Raj Giri, Tam V. -T. Mai, Thi T. -D. Nguyen, Milan Szori, Lam K. Huynh, Aamir Farooq
Summary: This study provides experimental and theoretical insights into the reaction of 1,4-pentadiene with OH radicals. The results show that the reaction rate is less affected by temperature and pressure, and the addition pathway dominates at low temperatures, with vinyl alcohol and allyl radical being important product channels.
COMBUSTION AND FLAME
(2022)
Article
Engineering, Environmental
Jiayun Deng, Jiabin Lu, Qiusheng Yan, Jisheng Pan
Summary: Hydroxyl radicals can effectively oxidise and corrode SiC, and the Electro-Fenton reaction can control the generation rate and total concentration of center dot OH. A conditional-response mathematical model accurately predicts center dot OH concentration, with a maximum of 9545.776 mu mol achieved. Manipulating electric field parameters accelerates Fe3+ conversion to Fe2+, increasing catalytic effect and enhancing center dot OH generation efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Faisal Sultan, Muhammad Shahzad, Mehboob Ali, Anees Ur Rehman, Arshed Ali, Mohamed Altanji, Syed Inayat Ali Shah
Summary: This paper focuses on the participation of chemical species and the invariant region of the reaction mechanism, introducing a computational technique 'Spectral Quasi Equilibrium Manifold' (SQEM) for accurate grid points to achieve dimensional curves without compromising system accuracy.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Emil Bein, Bettina Seiwert, Thorsten Reemtsma, Jorg E. Drewes, Uwe Huebner
Summary: Several oxidative treatment technologies have been studied and applied for the removal of monocyclic hydroaromatic carbon from water. However, little is known about the formation of transformation products and their fate in biodegradation. This study demonstrates that O3/H2O2 treatment leads to less hydroxylated aromatic transformation products compared to UV/H2O2 treatment, and raises questions regarding the biodegradability of oxidation products. The study provides new insights into the oxidation of monocyclic aromatics and has implications for treatment applications.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Zhezheng Ding, Yayi Yi, Wenxing Wang, Qingzhu Zhang
Summary: Chrysene, a recalcitrant polycyclic aromatic hydrocarbon, undergoes atmospheric degradation initiated by OH radical, generating toxic oxygenated and nitro products. The study reveals the rate constant and atmospheric lifetime of chrysene in reaction with OH radical.
Article
Environmental Sciences
Lei Tian, Shan-Shan Liu, Xun-Heng Jiang, Li-Sha Chen, Shao-Lin Wu, Wen-Jun Xiao, Jie-Ping Fan, Dai-She Wu, Jian-Ping Zou
Summary: This study investigates the selective oxidation capacity of coexisting SO4 center dot(-) and center dot OH towards organic moieties with differing electronegativity, shedding light on the degradation pathways of an organic contaminant.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Surabhi Patel, Subrata Kumar Majumder, Pallab Ghosh
Summary: The study demonstrates that ozonation can completely degrade and partially mineralize DCF, with increased pH and ozone supply rate enhancing the degradation process, while higher initial DCF concentrations slowing it down. The pseudo-first-order reaction rate constants range from 0.0742 to -0.0979 min(-1).
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Energy & Fuels
Saeid Aghahossein Shirazi, Thomas D. Foust, Kenneth F. Reardon
Article
Astronomy & Astrophysics
Monica G. Bobra, Stuart J. Mumford, Russell J. Hewett, Steven D. Christe, Kevin Reardon, Sabrina Savage, Jack Ireland, Tiago M. D. Pereira, Bin Chen, David Perez-Suarez
Article
Astronomy & Astrophysics
Yi Chai, Dale E. Gary, Kevin P. Reardon, Vasyl Yurchyshyn
Summary: This study investigates sunspot oscillations and wave propagation using data acquired from various instruments, including ALMA. The analysis shows that the ALMA temperature fluctuations are consistent with the characteristics of propagating acoustic waves, with slight asymmetry indicating nonlinearity steepening.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Momchil E. Molnar, Kevin P. Reardon, Steven R. Cranmer, Adam F. Kowalski, Yi Chai, Dale Gary
Summary: Observational constraints and synthetic observables are used to study the heating contribution of acoustic waves in the chromosphere. Results indicate that acoustic waves carry insufficient energy flux to maintain the quiet chromosphere.
ASTROPHYSICAL JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Xing-Feng Huang, Kenneth F. Reardon
Summary: The conversion of carbohydrates in biomass via fermentation is crucial for decarbonizing fuel and chemical production. Immobilized-cell technology in continuous bioprocesses can enhance productivity, while adding 2-phenylethanol can improve ethanol yield.
ENGINEERING IN LIFE SCIENCES
(2022)
Article
Astronomy & Astrophysics
V Greco, A. Sordini, G. Cauzzi, F. Cavallini, C. Del Vecchio, L. Giovannelli, F. Berrilli, D. Del Moro, K. Reardon, K. A. R. B. Pietraszewski
Summary: This study comprehensively characterizes the cavity of a 150 mm FPI with a novel symmetric design, showing that the design effectively limits the combined effects of pre-load and gravity forces. It also identifies a tilt variation between the plates of the interferometer during spectral scan, which can be corrected. The study demonstrates the satisfactory dynamical response of the new system to typical operational scenarios. It concludes that large, fully symmetric FPIs can be safely used in solar observations.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
(2022)
Article
Astronomy & Astrophysics
Johnathan R. Stauffer, Kevin P. Reardon, Matt Penn
Summary: Observations suggest that carbon monoxide (CO) lines are formed at approximately 530-650 km in the quiet Sun, rather than at lower layers from the photosphere to the chromosphere. It was found that there were seven long-lived cooling events in the region surrounding a large pore, but they were not visible in the three atomic lines. These findings may be related to the magnetic canopy field surrounding the pore.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Ryan A. Hofmann, Kevin P. Reardon, Ivan Milic, Momchil E. Molnar, Yi Chai, Han Uitenbroek
Summary: In this study, observations of a solar magnetic network region using ALMA and IBIS were presented. The measurements of local gas temperatures provided by ALMA were compared with the temperature diagnostics provided by non-LTE inversions using STiC. The use of column mass as the reference height scale and the treatment of non-LTE hydrogen ionization improved the accuracy of atmospheric profiles and the agreement between inferred chromospheric temperatures and ALMA measurements. However, the poor constraints on chromospheric electron density introduced uncertainties in determining the height(s) of formation of the millimeter continuum and the temperatures derived from spectral lines.
ASTROPHYSICAL JOURNAL
(2022)
Correction
Astronomy & Astrophysics
Yi Chai, Dale E. Gary, Kevin P. Reardon, Vasyl Yurchyshyn
ASTROPHYSICAL JOURNAL
(2022)
Review
Engineering, Biomedical
Mary Clare McCorry, Kenneth F. Reardon, Marcie Black, Chrysanthi Williams, Greta Babakhanova, Jeffrey M. Halpern, Sumona Sarkar, Nathan S. Swami, Katherine A. Mirica, Sarah Boermeester, Abbie Underhill
Summary: The use of engineered cells, tissues, and organs has the potential to revolutionize the treatment of injuries and diseases. However, the commercialization of these technologies is hindered by the complexity and cost of manufacturing. Real-time sensor technologies are crucial for ensuring consistent product quality and compatibility with manufacturing equipment.
Article
Energy & Fuels
Ivo Havlik, Sascha Beutel, Thomas Scheper, Kenneth F. Reardon
Summary: Microalgae are promising sources of fuels and chemicals. Efficient process control for microalgal cultivations requires on-line sensing of process variables. Optical sensors play a central role in monitoring the physical and chemical environment, while on-line sensors for biological variables are still in an earlier developmental stage and rely on indirect measurement and extensive data processing.
Article
Biotechnology & Applied Microbiology
Xing-Feng Huang, Kenneth F. Reardon
Summary: This study identified yeast quorum-sensing molecules that can inhibit cell growth of Saccharomyces cerevisiae while increasing ethanol yield, suggesting a strategy to improve fermentation product yield by manipulating biological control systems.
FEMS YEAST RESEARCH
(2021)
Article
Astronomy & Astrophysics
Momchil Molnar, Kevin P. Reardon, Christopher Osborne, Ivan Milic
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES
(2020)
Article
Astronomy & Astrophysics
Alphonse C. Sterling, Ronald L. Moore, Navdeep K. Panesar, Kevin P. Reardon, Momchil Molnar, Laurel A. Rachmeler, Sabrina L. Savage, Amy R. Winebarger
ASTROPHYSICAL JOURNAL
(2020)
Article
Astronomy & Astrophysics
Will T. Barnes, Monica G. Bobra, Steven D. Christe, Nabil Freij, Laura A. Hayes, Jack Ireland, Stuart Mumford, David Perez-Suarez, Daniel F. Ryan, Albert Y. Shih, Prateek Chanda, Kolja Glogowski, Russell Hewett, V. Keith Hughitt, Andrew Hill, Kaustubh Hiware, Andrew Inglis, Michael S. F. Kirk, Sudarshan Konge, James Paul Mason, Shane Anthony Maloney, Sophie A. Murray, Asish Panda, Jongyeob Park, Tiago M. D. Pereira, Kevin Reardon, Sabrina Savage, Brigitta M. Sipocz, David Stansby, Yash Jain, Garrison Taylor, Tannmay Yadav, Rajul, Trung Kien Dang
ASTROPHYSICAL JOURNAL
(2020)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.