Article
Chemistry, Analytical
Masami Mori, Ayumu Noguchi, Yoshiteru Itagaki
Summary: Nano-sized SmFeO3 particles were prepared by the pyrolysis of heteronuclear cyano-complex, Sm[Fe(CN)(6)]center dot 4H(2)O at a temperature of 600 degrees C in ozone. These particles were further classified into smaller particles, showing good ethanol sensing response and selectivity.
Article
Engineering, Chemical
Qi Zhang, Fang Guo, Liangyun Yu, Bailin Wang, Jingya Ding, Lan Fan, Yifan Wu, Bairen Yang, Qi Xu
Summary: A MnO2/TiO2 catalyst with uniformly dispersed MnO2 was prepared and used for the degradation of toluene under VUV. The catalyst improved the toluene removal efficiency and eliminated O3, with a toluene removal rate of 88% and an O3 removal rate of 97%. The toluene removal efficiency under VUV was 4.9 times that of UV, and the synergistic effect of VUV and multifunctional catalyst effectively improved the toluene removal efficiency.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Engineering, Chemical
Chong Tao, Limo He, Xuechen Zhou, Hanjian Li, Qiangqiang Ren, Hengda Han, Song Hu, Sheng Su, Yi Wang, Jun Xiang
Summary: This review discusses the characteristics and removal methods of volatile organic compounds (VOCs) in cooking oil fumes. The emission characteristics are influenced by cooking temperatures, cooking oils, and cuisines. Various purification methods, such as physical capture, chemical decomposition, and combination methods, are compared based on VOC removal rate, operability, secondary pollution, application area, and cost. The catalytic combustion method, particularly with noble metal and non-noble metal catalysts, shows high efficiency, environmental friendliness, and low cost.
Article
Environmental Sciences
Jung Hyun Son, Longbo Shi, Wei Zhang, Zhe Bai, Ling Li, Lina Wang, Jianmin Chen
Summary: Measurements were conducted in a laboratory kitchen to investigate the types, emission factors, and ozone formation potential (OFP) of non-methane hydrocarbons (NMHCs) generated during various cooking processes. The results showed that NMHC emission factors varied for different types of cooking activities and types of food materials. Trichloroethylene, toluene, n-dodecane, isoprene, ethylene, and 3-methylpentane were identified as the NMHC species with the greatest OFPs during cooking. These findings provide valuable information on the impact of Chinese kitchens on indoor air quality.
AIR QUALITY ATMOSPHERE AND HEALTH
(2023)
Article
Environmental Sciences
Y. Zou, X. L. Yan, R. M. Flores, L. Y. Zhang, S. P. Yang, L. Y. Fan, T. Deng, X. J. Deng, D. Q. Ye
Summary: This study investigates the impact of volatile organic compounds (VOCs) on ozone formation by considering their photochemical loss. The results show that neglecting the chemical loss of VOCs leads to underestimation of the contributions from highly reactive VOC components and overestimation of contributions from VOC components with lower chemical activity. Additionally, the estimation of ozone formation may be underestimated if the atmospheric photochemical loss is not taken into account.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jinli Xu, Huifan Deng, Yiqun Wang, Pan Li, Jianqiang Zeng, Hongwei Pang, Xin Xu, Xue Li, Yan Yang, Sasho Gligorovski
Summary: Human daily activities such as cooking and cleaning can affect indoor air quality by emitting volatile organic compounds (VOCs) and forming secondary compounds through reactions with ozone (O3) and hydroxyl radicals (OH). However, our understanding of the formation processes of secondary VOCs is still limited. In this study, we measured the primary VOCs emitted by a commercial floor-cleaning detergent and the secondary compounds formed by the reaction of O3 with the detergent using high-resolution mass spectrometry. We also developed reaction mechanisms to describe the formation of these secondary VOCs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Hanyu Zhang, Xuejun Wang, Xianbao Shen, Xin Li, Bobo Wu, Guohao Li, Huahua Bai, Xinyue Cao, Xuewei Hao, Qi Zhou, Zhiliang Yao
Summary: The cooking process generates harmful volatile organic compounds (VOCs) that harm the environment and human health. This study conducted a comprehensive analysis of VOCs emissions from multiple cuisines, evaluating concentration characteristics, ozone formation potential (OFP), and purification efficiency. The VOCs emissions varied across cuisines, with the highest from Barbecue and the lowest from Family cuisine. Different cuisines had different dominant VOCs species, with alkanes and alcohols being prominent contributors. The study also evaluated different control technologies for VOCs reduction and identified more effective methods for alleviating air pollution from cooking emissions.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Ehsan Soleimanian, Yuxuan Wang, Mark Estes
Summary: This study investigated the long-term variations in ambient levels of surface ozone, volatile organic compounds (VOCs), and nitrogen oxides (NOx) within the Houston-Galveston-Brazoria (HGB) region. The results showed an overall reduction in ozone levels, mainly due to regional background ozone and a decrease in local anthropogenic emissions. The contribution of the solvent/painting/rubber industries to ozone pollution was found to be increasing.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Luying Sun, Yujie Tan, Hui Xu, Ruchen Shu, Zhi Liu, Ruina Zhang, Jianyuan Hou, Renxi Zhang
Summary: A novel photocatalytic functional coating was developed by modifying g-C3N4/TiO2 composites with dielectric barrier discharge (DBD), which exhibited high catalytic performance under solar light. The degradation of xylene released from fluorocarbon coating solvents was studied using g-C3N4/TiO2 composite coatings under simulated solar irradiation. Coatings mixed with 10% DBD-modified g-C3N4/TiO2 showed stable, long-lasting, and significantly higher activity compared to those mixed with unmodified catalyst. 98% of xylene was successfully removed in 2 hours under solar light. SEM, TEM, FT-IR, UV-vis, XPS, and other techniques were used to evaluate the properties of the catalyst samples before and after modification, suggesting improved capture ability and utilization efficiency of solar light.
Article
Materials Science, Multidisciplinary
A. G. Abd-Elrahim, Manar A. Ali
Summary: Zn-rich ZnCdS nanoparticles are successfully synthesized using a chemical co-precipitation technique, exhibiting homogeneous crystal structure and an average crystalline domain size of about 4 nm. The optical bandgap of the nanoparticles is found to be 3.95 eV, higher than the corresponding bulk alloy due to the quantum size effect. UV irradiation can impact the optical band gap, with a decrease in E-g observed up to 60 min of exposure time followed by saturation at higher UV exposure times. The emission spectrum of the ZnCdS nanopowder extends from UV to visible spectral region and can be recovered by direct exposure to UV irradiation, indicating the potential for durability in fluorescence sensor applications.
Article
Engineering, Environmental
Nacer Belkessa, Abdelkrim Bouzaza, Aymen Amin Assadi
Summary: Hybrid non-thermal plasma combined with photocatalysis is an efficient technology for the degradation of volatile organic compounds (VOCs) and leads to a synergetic boosting effect of the degradation process. Various operational conditions, including the choice of UV light source, catalyst weight, addition of metallic dopants, catalyst support, and oxygen content, were found to affect the synergetic effect. UVC light source and metallic dopants showed enhanced synergetic effect, while TiO2/NF with a thickness of 3.3 mm demonstrated the highest synergetic effect.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Xinliang Cheng, Liqiang Wang, Lijuan Fang, Shiyan Chen, Xin Zhou, Jingjun Ma, Yuqing Pan, Pengfei Li
Summary: The accurate identification of ozone (O-3) production sensitivity is crucial for developing pollution control policies. This study combines nitrogen oxide (NOx) and particle uptakes to optimize peroxy radical loss estimates and analyze the relative sensitivity in Chun'an, China. The results show that the dominant precursor for O-3 production sensitivity shifts from volatile organic compounds (VOCs) in the morning and evening to NOx in the afternoon.
Review
Environmental Sciences
Aishwaryashri Tamrakar, Shamsh Pervez, Madhuri Verma, Dipanjali Majumdar, Yasmeen Fatima Pervez, Carla Candeias, Princy Dugga, Archi Mishra, Sushant Ranjan Verma, Manas Kanti Deb, Kamlesh Shrivas, Manmohan L. Satnami, Indrapal Karbhal
Summary: This review examines the concentrations, sources, ozone formation potential, and health risks of BTEX in different locations in India. The study found that BTEX concentrations were higher in urban environments compared to rural areas, with traffic pollution being the main source. Winter had higher concentrations than other seasons, and toluene, benzene, and xylene isomers contributed to ozone formation.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Microbiology
Melissa Tan, Yanis Caro, Alain Shum Cheong Sing, Heloise Reiss, Jean-Marie Francois, Thomas Petit
Summary: Yeast volatile organic compounds (VOCs) have potential as natural aromas and can replace artificial flavors, with unconventional yeast strains showing promise in producing alternative VOCs. A Saprochaete suaveolens strain isolated from dragon fruit in Reunion Island demonstrated enhanced production of alpha-unsaturated esters through UV mutagenesis, marking a significant advancement in VOC enhancement in microbial strains.
Article
Environmental Sciences
Jiayan Yu, Lingshuo Meng, Yang Chen, Huifang Zhang, Jianguo Liu
Summary: Concerns have been raised about near-surface ozone pollution in Lhasa, with limited understanding of its formation and distribution. Volatile organic compounds and nitrogen oxides are identified as crucial factors in controlling ozone formation, and reducing anthropogenic emissions is an effective way to decrease ozone concentrations.
Article
Engineering, Environmental
Huazhen Shen, Iau-Ren Ie, Chung-Shin Yuan, Chung-Hsuang Hung, Wei-Hsiang Chen, Jinjing Luo, Yi-Hsiu Jen
JOURNAL OF HAZARDOUS MATERIALS
(2015)
Article
Engineering, Chemical
Yuhua Li, Wan-Hua Li, Chung-Shin Yuan, Chung-Hsuang Hung, Huazhen Shen
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2017)
Article
Environmental Sciences
Wen-Bin Yang, Chung-Shin Yuan, Chuan Tong, Pin Yang, Lei Yang, Bang-Qin Huang
MARINE POLLUTION BULLETIN
(2017)
Article
Engineering, Environmental
Hua-zhen Shen, Chung-shin Yuan, Guohua Jing, Chung-Hsuang Hung, Chuan-wen Liu
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Energy & Fuels
Huazhen Shen, Iau-Ren Ie, Chung-Shin Yuan, Chung-Hsuang Hung, Chuan-wen Liu
Article
Environmental Sciences
Vo Thi Dieu Hien, Chitsan Lin, Vu Chi Thanh, Nguyen Thi Kim Oanh, Bui Xuan Thanh, Chien-Erh Weng, Chung-Shin Yuan, Eldon R. Rene
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Environmental Sciences
Gerry Bagtasa, Mylene G. Cayetano, Chung-Shin Yuan, Osamu Uchino, Tetsu Sakai, Toshiharu Izumi, Isamu Morino, Tomohiro Nagai, Ronald C. Macatangay, Voltaire A. Velazco
ATMOSPHERIC ENVIRONMENT
(2019)
Article
Energy & Fuels
Thuy Chu-Van, Nicholas Suraski, Zoran Ristovski, Chung-Shin Yuan, Svetlana Stevanovic, S. M. Ashrafur Rahman, Farhad M. Hossain, Yi Guo, Thomas Rainey, Richard J. Brown
Article
Environmental Sciences
Ching-Mei Huang, Chung-Shin Yuan, Wen-Bin Yang, Lei Yang
MARINE POLLUTION BULLETIN
(2019)
Article
Engineering, Environmental
Li-Lian Liu, Chen-Yun Hsieh, Meng-Ying Kuo, Chienhsun Chen, Yen-Hong Shau, Hon-Kit Lui, Chung-Shin Yuan, Chen-Tung Arthur Chen
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Construction & Building Technology
Ho-Hsiang Lin, Chung-Shin Yuan, Wang-Kun Chen, Chang-Tang Chang, Pei-Shih Chen
Summary: This study used on-site measurement and model simulation to characterize the spatial distribution of indoor particulate matter in a single room with stratified flow fields. It revealed that fine particles accounted for a large percentage of total PM emissions. The results provide crucial information for determining indoor PM monitoring sites.
INDOOR AND BUILT ENVIRONMENT
(2021)
Article
Chemistry, Physical
Huazhen Shen, Zhilei Guo, Wenjie Xia, Xiaowei Zhang, Zhiwei Huang, Huawang Zhao, Xiaomin Wu, Chung-shin Yuan, Guohua Jing
Summary: 0.1% Au single atom-doped Ti4+ defect TiO2 (0.1% Au-Ti1-xO2) showed high photooxidation efficiency of Hg0 with the assistance of Au-(O)4 coordination, which significantly promoted the separation of photogenerated electron-hole pairs. Additionally, 0.1% Au-Ti1-xO2 exhibited remarkable resistance to SO2 and NO by preventing the deposition of nitrates and sulfates.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Environmental Sciences
Tsung-Chang Li, Chung-Shin Yuan, Hu-Ching Huang, Chon-Lin Lee, Shui-Ping Wu, Chuan Tong
ATMOSPHERIC ENVIRONMENT
(2017)
Article
Environmental Sciences
Huazhen Shen, Cheng-Mou Tsai, Chung-Shin Yuan, Yi-Hsiu Jen, Iau-Ren Ie