Article
Engineering, Environmental
Hakan Celikten, S. Levent Kuzu, Arslan Saral, Murat Aksel
Summary: A full-scale biofilter unit was evaluated for treating composting waste gas by measuring VOCs and TOC, showing average TOC removal rate of 67 +/- 11 % and lower VOC removal rates due to species selection. The study further analyzed waste gas distribution with computational fluid dynamics, revealing non-uniform flow distribution affecting treatment efficiencies.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Pamela S. Rickly, Matthew M. Coggon, Kenneth C. Aikin, Raul J. Alvarez II, Sunil Baidar, Jessica B. Gilman, Georgios I. Gkatzelis, Colin Harkins, Jian He, Aaron Lamplugh, Andrew O. Langford, Brian C. McDonald, Jeff Peischl, Michael A. Robinson, Andrew W. Rollins, Rebecca H. Schwantes, Christoph J. Senff, Carsten Warneke, Steven S. Brown
Summary: Increasing trends in biomass burning emissions significantly impact air quality in North America. The transport of smoke from local and long-range fires has been found to increase the mixing ratios of ozone (O3) in urban areas. This is primarily due to the transport of pyrogenic volatile organic compounds (PVOCs) and the influence of O3 produced within the smoke. Detailed chemical measurements have shown that both local and long-range smoke periods lead to increases in carbon monoxide, background O3, OH reactivity, and total VOCs, while the NOx mixing ratios remain constant. Box-model calculations indicate that local O3 production is in the NOx-sensitive regime, with PVOCs substantially increasing O3 production in the transition and NOx-saturated regimes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yong-Chao Wang, Can Wang, Meng-Fei Han, Zhen Tong, Yu-Ting Lin, Xu-Rui Hu, Ji-Guang Deng, Hsing-Cheng Hsi
Summary: In this study, a new method using enzymatic-quorum quenching (QQ) was developed to control biomass growth and maintain stable removal efficiency in gas biofilters. The application of QQ technology significantly reduced pressure drop and biomass accumulation, and altered biofilm characteristics to enhance metabolic activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yafei Liu, Peipei Qiu, Kai Xu, Chenlu Li, Shijie Yin, Yunjun Zhang, Yu Ding, Chen Zhang, Zheng Wang, Ruixiao Zhai, Yijun Deng, Fengyu Yan, Wenjie Zhang, Zhigang Xue, Yele Sun, Dongsheng Ji, Jie Lie, Jing Chen, Hezhong Tian, Xingang Liu, Yuanhang Zhang
Summary: Long-term continuous hourly measurements of ambient volatile organic compounds (VOCs) were conducted in heavily polluted areas of China. The study found that industrial emissions were the main source of VOCs, particularly from the coking industry. Controlling VOC emissions can effectively mitigate ozone (O3) pollution in the region.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Beth S. Nelson, Daniel J. Bryant, Mohammed S. Alam, Roberto Sommariva, William J. Bloss, Mike J. Newland, Will S. Drysdale, Adam R. Vaughan, W. Joe F. Acton, C. Nicholas Hewitt, Leigh R. Crilley, Stefan J. Swift, Pete M. Edwards, Alastair C. Lewis, Ben Langford, Eiko Nemitz, Ranu Shivani, Ranu Gadi, Bhola R. Gurjar, Dwayne E. Heard, Lisa K. Whalley, Uelkeu A. Sahin, David C. S. Beddows, James R. Hopkins, James D. Lee, Andrew R. Rickard, Jacqueline F. Hamilton
Summary: Delhi, India, experiences periods of very poor air quality, and this study investigates the chemical production of secondary pollutants in this highly polluted area. The authors found extremely high nighttime concentrations of NOx and VOCs, with low concentrations of oxidants and high nighttime NO concentrations. This leads to an atypical NO3 diel profile and a shift in peak O3 concentrations compared to the premonsoon period. The authors suggest that urban air quality management should consider the impacts of nighttime emission sources in the postmonsoon period.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Lisa Ernle, Monika Akima Ringsdorf, Jonathan Williams
Summary: The measurement of volatile organic compounds (VOCs) can be affected by ozone (O-3), leading to corrupted data. This study presents results from experiments using a sodium thiosulfate ozone scrubber (Na2S2O3) which proved to be effective in reducing ozone interference during gas-phase sampling.
ATMOSPHERIC MEASUREMENT TECHNIQUES
(2023)
Article
Green & Sustainable Science & Technology
Witold Zukowski, Przemyslaw Migas, Marta Zurek, Jan Wrona
Summary: The results of the n-hexane oxidation process in a fluidized bed reactor with a catalytic bed are presented. Baffles were used to modify the flow in the reactor and improve the process efficiency. The best results were achieved with the use of horizontal elements in the form of grids, which significantly improved the conversion of n-hexane to carbon dioxide.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Sara Cantera, Martino Lopez, Raul Munoz, Raquel Lebrero
Summary: This study compared the removal performance of four volatile organic compounds (VOCs) with different hydrophobicity and molecular structure in different bioreactor configurations, and found that different reactor configurations had an impact on the removal efficiency and stability of different VOCs. Microbial community analysis showed that VOCs as the sole carbon and energy source did not promote the growth of dominant bacterial members, and the populations evolved independently in each reactor configuration and operation mode.
Article
Environmental Sciences
Lichao Lu, Dong Dong, Marvin Yeung, Zhuqiu Sun, Jinying Xi
Summary: In this study, a lab-scale fluidized bed reactor (FBR) was compared with a packed bed reactor (PBR) for treating gaseous toluene. The FBR showed a stable performance, better mass transfer, and more homogeneous air flow distribution compared to the PBR.
Article
Environmental Sciences
Sehrish Khan, Shahla Nazneen, Sardar Khan, Neelum Ali
Summary: The study showed that ambient ozone poses a threat to the yield and nutritional quality of chilli plants, with EDU treatment resulting in better growth and yield parameters. However, there was no significant difference in mineral contents between the plants treated with EDU and the control group.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Sujan Shrestha, Subin Yoon, Matthew H. Erickson, Fangzhou Guo, Manisha Mehra, Alexander A. T. Bui, Benjamin C. Schulze, Alexander Kotsakis, Conner Daube, Scott C. Herndon, Tara I. Yacovitch, Sergio Alvarez, James H. Flynn, Robert J. Grif, George P. Cobb, Sascha Usenko, Rebecca J. Sheesley
Summary: The San Antonio Field Study (SAFS) aimed to investigate the production and precursors of ozone in rapidly changing urban areas. The study found that acetone, acetaldehyde, and isoprene were the VOCs with the highest concentrations, and there was a potential influence of oil and gas activities. Additionally, the study provided vital information for air quality management and strategies to reduce O3 pollution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Fangzhou Guo, Alexander A. T. Bui, Benjamin C. Schulze, Subin Yoon, Sujan Shrestha, Henry W. Wallace, Yuta Sakai, Blake W. Actkinson, Matthew H. Erickson, Sergio Alvarez, Rebecca Sheesley, Sascha Usenko, James Flynn, Robert J. Griffin
Summary: San Antonio, the second-largest city in Texas, has been designated as a marginal non-attainment area for the 2015 ozone National Ambient Air Quality Standard by the US Environmental Protection Agency. Field measurements and modeling suggest that nitrogen oxides play a key role in O3 formation, with recommendations to strengthen NOX emission controls to reduce O3 formation in the city.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Thermodynamics
Lukas Stanger, Alexander Schirrer, Florian Benedikt, Alexander Bartik, Stefan Jankovic, Stefan Muller, Martin Kozek
Summary: Dual fluidized bed steam gasification enables the production of valuable gas from woody biomass or biogenic residuals. Advanced control concepts, like model predictive control, are promising for improving process performance and efficiency. This paper presents a gray-box modeling approach, incorporating data-driven components, to obtain a mathematical description of temperatures and mass flows in the reactors. Artificial neural networks are used to model bed material circulation. Experimental data from a pilot plant validate the model's predictions for the dual fluidized bed gasification process.
Article
Engineering, Chemical
Heng Zhou, Xu Tian, Mingyin Kou, Shengli Wu, Yansong Shen
Summary: The numerical study of gas-fine flow in a packed bed with lateral injection provides insights into the distribution and clogging behaviors of fine particles. Various variables such as diameter ratio, mass flux of fine particles, and rolling frictional coefficient impact the behavior of fine particles in the packed bed. The results indicate that changes in these variables lead to differences in the clustering and dispersion of fine particles in the packed bed.
Article
Environmental Sciences
Xun Li, Momei Qin, Lin Li, Kangjia Gong, Huizhong Shen, Jingyi Li, Jianlin Hu
Summary: This study examined the application of four photochemical indicators in the Yangtze River Delta region in China and found that they had high accuracy. Among them, HCHO/NO2 and HCHO/NOy showed the most consistency, while PH2O2/PHNO3 tended to underestimate the positive response of O-3 to NOx. Additionally, the methodology used to derive the threshold values may introduce uncertainties in the application of photochemical indicators.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Biomedical
Xuefei Zhao, Dong Liu, Li Ma, Quan Liu, Kun Chen, Shane Xie, Qingsong Ai
Summary: The study introduces a convolutional neural network with an end-to-end serial-parallel structure for analyzing MI-EEG, and improves cross-subject classification accuracy through transfer learning. Experimental results demonstrate that the model performs well in analyzing multi-class MI activities and successfully reduces the number of training parameters.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2022)
Article
Energy & Fuels
Huihui Zhu, Hongyu Chu, Yaming Zhu, Haitao Bai, Yunliang Xu, Chaoshuai Hu, Junxia Cheng, Xuefei Zhao
Summary: Ethylene residue pitch (ETP) is a by-product of crude oil pyrolysis. Thermal modification of ETP can enhance the quality of derived needle coke. Moderate thermal modification significantly improves the properties of the derived needle coke.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Energy & Fuels
Chaoshuai Hu, Hongyu Chu, Yaming Zhu, Yunliang Xu, Junxia Cheng, Lijuan Gao, Shiquan Lai, Xuefei Zhao
Summary: The study found that mesophase cokes derived from extract-based coal tar pitch have larger and more orderly graphite structure, while residue-based cokes have higher micro-strength intensity. The Tmax values of the two cokes are opposite, and all data of the two cokes exhibit bipolar distribution.
Article
Chemistry, Multidisciplinary
Zijian Yang, Qingjie Fan, Shiquan Lai, Li Yue, Junxia Cheng, Yaming Zhu, Xuefei Zhao
Summary: In this study, N/O-codoped high-capacity porous carbons were prepared by catalytically synthesizing a quinoline pitch (QLP) and then activating it with KOH at high temperature. These porous carbons exhibited excellent electrochemical performances with hierarchical and interconnected pore structures and high N/O-doping contents. They maintained high specific capacitances even under high current densities and showed good cycling stability.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Applied
Fukuan Zhang, Xuefei Zhao, Jie Zhang, Lili Zhao, Lin Li, Jiayi Yang, Hao Li, Haiqing Luo
Summary: In this study, an electrochemically induced method for regio- and stereoselective (E)-beta-C(sp(2))-H trifluoromethylation of enamides was disclosed. The method features catalyst-free, simple setup, and broad substrate scopes, allowing for the synthesis of products with exclusive E-selective control under mild conditions.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Energy & Fuels
Yuzhu Zhang, Xiang Liu, Shihao Gu, Lidong Yan, Yaming Zhu, Chaoshuai Hu, Xitao Yin, Xuefei Zhao
Summary: Through the co-carbonization of coal liquefaction pitch (CLP) and refined soft pitch, high-quality needle coke has been successfully synthesized. Blending CLP and refined soft pitch allows for the adjustment of the thermal stability of the pitch mixture, and co-carbonization is an effective technique for preparing high-quality needle coke.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Integrative & Complementary Medicine
Xuefei Zhao, Jianjun He, Jue Liu
Summary: Positive psychological nursing combined with free posture can significantly improve the prognosis of primipara with singleton spontaneous delivery, by shortening labor stages, reducing pain, and improving delivery outcomes.
EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE
(2022)
Article
Immunology
Linling Lv, Guangcong Ruan, Yi Ping, Yi Cheng, Yuting Tian, Zhifeng Xiao, Xuefei Zhao, Dongfeng Chen, Yanling Wei
Summary: Precision probiotic strains transplantation capsules have significant therapeutic effect on diarrhea irritable bowel syndrome, improving symptoms and the intestinal microbiota of patients.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2022)
Review
Chemistry, Physical
Jingying Shi, Xuefei Zhao, Can Li
Summary: Surface passivation engineering is a crucial approach to enhance the performance of photoelectrodes in photoelectrochemical (PEC) water splitting. This review summarizes various passivation materials and their preparation methods, characterizations by PEC measurements and related spectral technologies. The distinct features of the passivation effect, separate from other modifications such as cocatalyst decoration, are highlighted. Significant progress in combining surface passivation engineering with other interfacial modification strategies for the rational design of photoelectrodes is demonstrated. Ideas for future research on surface passivation modification to improve the performance of photoelectrodes are also proposed.
Review
Endocrinology & Metabolism
Cunqing Yang, Xuefei Zhao, Xuedong An, Yuehong Zhang, Wenjie Sun, Yuqing Zhang, Yingying Duan, Xiaomin Kang, Yuting Sun, Linlin Jiang, Fengmei Lian
Summary: Diabetic peripheral neuropathy is a chronic metabolic disease that seriously affects patients' quality of life and can lead to amputation and neuropathic pain. Current treatment options only address symptoms and do not reverse nerve damage. Understanding the underlying mechanisms is crucial for prevention and the development of new therapies.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Review
Endocrinology & Metabolism
Xuefei Zhao, Xuedong An, Cunqing Yang, Wenjie Sun, Hangyu Ji, Fengmei Lian
Summary: Insulin resistance (IR) is crucial in metabolism-related diseases and provides a basis for understanding chronic diseases. This study reviewed the causes, mechanisms, and treatments of IR. Various factors including genetics, obesity, and disease lead to abnormalities in the insulin signaling pathway and development of IR. Therapeutic strategies include exercise, dietary changes, chemotherapy, and traditional Chinese medicine treatments. Further research is needed to define biomarkers and explore targeted drug treatments for IR to improve patients' quality of life.
FRONTIERS IN ENDOCRINOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shushuang Sun, Yaming Zhu, Zishuo Gu, Hongyu Chu, Chaoshuai Hu, Lijuan Gao, Xuefei Zhao
Summary: In this study, bamboo fiber activated carbon (BAC) with high specific surface area and pore volume was prepared through the optimized process using response surface method. Characterization methods were used to analyze the micro-structure of BAC, which showed that BAC maintained the original pores of the bamboo fiber. The adsorption capacity of BAC for crystal violet in simulated wastewater reached a removal rate of 99.96%, and the adsorption process conformed to the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. BAC has great application prospects in dye wastewater treatment.
Article
Chemistry, Multidisciplinary
Yuzhu Zhang, Xiang Liu, Miaomiao Tian, Yaming Zhu, Chaoshuai Hu, Xuefei Zhao
Summary: This study investigated the feasibility of producing high-quality needle coke from coal liquefaction pitch. The co-carbonization of coal liquefaction pitch and anthracene oil was found to be an essential method for controlling the microstructure and properties of the derived needle coke. The addition of anthracene oil was a suitable method for adjusting the properties of coal liquefaction pitch and producing high-quality needle coke.
Article
Spectroscopy
Fan Qing-jie, Song Yan, Lai Shi-quan, Yue Li, Zhu Ya-ming, Zhao Xue-fei
Summary: This paper investigates the structural changes of soft coal tar pitch (SCTP) at different carbonization temperatures using CarbX software and X-ray diffraction (XRD) data. The results provide valuable insights into the microstructure of SCTP and its potential for producing high-quality needle coke.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)
Article
Spectroscopy
Hu Chao-shuai, Xu Yun-liang, Chu Hong-yu, Cheng Jun-xia, Gao Li-juan, Zhu Ya-ming, Zhao Xue-fei
Summary: The regulation of molecular structure and thermal conversion behavior of coal tar pitch is essential for preparing high-quality carbon materials. This study investigated the relationship between pyrolysis behavior and molecular structure of coal tar pitch by extracting 8 kinds of extracts using different organic solvents. The infrared spectra analysis revealed that the extracts are complex compounds composed of condensed aromatic ring structures with aliphatic hydrocarbon side chains containing oxygen and nitrogen. The thermal weight loss behavior of the extracts was studied using thermogravimetric analysis, and the pyrolytic activation energies were calculated. The results showed that the pyrolytic activation energies are closely related to the structure and content of functional groups. The aromaticity index and degree of branching were found to be the main indicators determining the pyrolysis activation energy. The fitting relationship model between the pyrolytic activation energy and the infrared spectral structure indexes was established, providing a better understanding of coal tar pitch's pyrolysis.
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2022)