Article
Chemistry, Multidisciplinary
Akash Kaithal, Basujit Chatterjee, Christophe Werle, Walter Leitner
Summary: The acceptorless dehydrogenation of methanol to carbon monoxide and hydrogen using homogeneous molecular complexes, particularly those containing ruthenium and manganese with the MACHO ligand framework, showed promising catalytic activities. The metal complex was found to mediate the initial fast dehydrogenation of methanol to formaldehyde and methyl formate followed by subsequent slow decarbonylation, resulting in gas mixtures with varying CO/H2 ratios.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Biochemistry & Molecular Biology
Sofia S. Mendes, Vanessa Miranda, Ligia M. Saraiva
Summary: Hydrogen sulfide and carbon monoxide can have beneficial or harmful effects on organisms depending on their concentrations, with humans and some bacteria producing small amounts of these compounds. Research has focused on how bacteria produce and utilize H2S and CO, as well as their potential antimicrobial properties at higher concentrations and how microbial systems detect and survive toxic levels of these gases. Additionally, their antimicrobial properties against human pathogens have been highlighted when produced endogenously by the host or released by external chemical donors.
Article
Engineering, Civil
Wenping Deng, Xiling Zheng, Shengsheng Xiao, Qi Chen, Yaoyao Gao, Ling Zhang, Jiahui Huang, Tianjun Bai, Songhua Xie, Yuanqiu Liu
Summary: This study analyzed the interception process and influencing factors of litter for six tree species. The results showed that the interception process of litter can be divided into three phases. Different tree species and rainfall characteristics significantly affected the first phase, but litter mass had no impact. Litter mass and rainfall intensity significantly influenced the maximum interception capacity and minimum storage capacity of litter, and their interaction had the largest contribution to the maximum interception capacity.
JOURNAL OF HYDROLOGY
(2023)
Article
Chemistry, Physical
Alexandr A. Shtertser, Vladimir Yu Ulianitsky, Denis K. Rybin, Igor S. Batraev, Evgeniy S. Prokhorov, Mikhail S. Vlaskin
Summary: To reduce greenhouse gas emissions and facilitate the transition to a hydrogen economy, the development of new carbon-neutral technologies is crucial. One potential technology involves the detonation decomposition of acetylene, which simultaneously produces hydrogen and carbon black with minimal carbon monoxide emissions. This paper presents experimental results on the production of nanoscale detonation carbon (NDC) and hydrogen using a laboratory version of the Pulse Gas-Detonation Device, which can produce 1.7 kg of hydrogen and 17.7 kg of NDC per hour.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Mengdan Zhang, Jian Cheng, Zhiqiang Shen, Paiyu Lin, Shenggang Ding, Jinming Hu
Summary: This study developed a single-component ultrasound-responsive dual gasotransmitter donor that can release carbon monoxide (CO) and hydrogen sulfide (H2S) simultaneously, showing synergistic antibacterial and anti-inflammatory activities. It exhibits unique therapeutic potential and outperforms conventional antibiotic treatment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Crystallography
Erlisa Baraj, Karel Ciahotny, Tomas Hlincik
Summary: The WGS reaction is a exothermic reaction used industrially for over a hundred years, now receiving attention as a way to produce environmentally acceptable hydrogen. Optimal catalysts are key for industrial scale applications, with new types being developed to improve on commonly used Fe- and Cu-based catalysts. Lab tests show that Cu-based catalysts perform well in a certain temperature range, while Co-based catalysts show good resistance to sulfur.
Article
Forestry
Taehyun Kim, Jungyoon Kim, Jeman Lee, Hyun Seok Kim, Juhan Park, Sangjun Im
Summary: This study estimated the water retention capacity of forest leaf litter through lysimeter measurements under field conditions. The results showed that Pinus koraiensis litter stored more water than Quercus acutissima litter during rainfall. The study demonstrated the importance of leaf litter in water balance and the reliability of lysimetry as a measurement method.
Article
Chemistry, Multidisciplinary
Seongmin Jin, Yongha Park, Young Suk Jo, Chang-Ha Lee
Summary: A sorption-enhanced water-gas shift membrane reactor (SE-WGS-MR) system developed in this study combines catalytic reaction, adsorptive separation, and membrane purification to capture carbon dioxide and purify H-2, demonstrating high-purity H-2 production potential.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Environmental Sciences
Harikrishna Prasad Mamidala, D. Ganguly, R. Purvaja, Gurmeet Singh, Subhajit Das, M. Nageswar Rao, Armoury Kazip Ys, K. Arumugam, R. Ramesh
Summary: Efficient decomposition of leaf litter plays a crucial role in the nutrient cycling and carbon sequestration of mangrove ecosystems. This study investigated the decomposition characteristics and organic carbon supply of leaf litter from four major mangrove species in India. The results showed variations in decomposition rates and released organic carbon among the different species, with S. apetala and R. mucronata exhibiting the highest potential to support the aquatic food web. Additionally, the study highlighted the importance of leaf litter leachates as a food source for microbial communities in coastal waters.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Geosciences, Multidisciplinary
Renshan Li, Xingyi Guo, Jianming Han, Qingpeng Yang, Weidong Zhang, Xin Yu, Xinkuan Han, Longchi Chen, Xin Guan, Zhangquan Zeng, Huixia Yang, Silong Wang
Summary: Stable residue size in leaf litter decomposition is influenced by initial nitrogen, lignin, and manganese concentrations, as well as the type of litter and environmental factors such as temperature, latitude, and precipitation. The initial traits of litter have a stronger explanatory ability for the variance in stable residue size compared to climatic factors. These findings contribute to a better understanding and prediction of global-scale soil organic layer accumulation.
Article
Forestry
Taina Madalena Oliveira de Morais, Erika Berenguer, Jos Barlow, Filipe Franca, Gareth D. Lennox, Yadvinder Malhi, Liana Chesini Rossi, Marina Maria Moraes de Seixas, Joice Ferreira
Summary: This study examines the impact of extreme climatic events and human disturbances on leaf-litter production in Amazonian forests, finding an increase in production during El Niño, followed by a sharp decrease, and a gradual recovery between 2017 and 2019.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Review
Energy & Fuels
Erlisa Baraj, Karel Ciahotny, Tomas Hlincik
Summary: The water gas shift reaction (WGSR) is a moderately exothermic reaction between carbon monoxide and steam, typically conducted in two stages at different temperatures with different catalysts. There is no universally accepted reaction mechanism for WGSR, and catalyst deactivation presents a limitation on its utilization. Various catalysts are active for WGSR, and catalyst preparation and pre-treatment steps play a crucial role in catalyst activity.
Article
Chemistry, Analytical
Natalia-Maria Christopoulou, Despina P. Kalogianni, Theodore K. Christopoulos
Summary: Carbon dots are promising nanomaterials for novel analytical tools, with physicochemical properties determined by precursors and synthesis conditions. CD preparations from Posidonia oceanica leaf litter exhibit fluorescence properties and can be used as analytical reagents for detecting metal ions.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Physical
Raziyeh Jokar, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari
Summary: CuMn samples with different weight percentages of CuO were synthesized by mechanochemical route. The catalytic activity of the samples in CO-PROX was determined in the temperature range of 40-250°C. The formation of spinel phase enhanced the CO adsorption active sites and modified the redox properties. The incorporation of copper into manganese oxide modified the catalytic activity and structural properties. The 5CuMn catalyst with the highest BET area exhibited excellent CO conversion and selectivity, as well as significant resistance to water.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Maratun Najiha Abu Tahari, Fairous Salleh, Tengku Shafazila Tengku Saharuddin, Alinda Samsuri, Salma Samidin, Mohd Ambar Yarmo
Summary: This study investigated the reduction behavior of hematite at high temperatures using different gas concentrations, revealing that CO is a more efficient reductant than H2 as it can initiate reduction at lower temperatures. However, H2 is faster in completing the reduction process at higher temperatures due to its stronger reducing ability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Sanjeev Dasari, August Andersson, Maria E. Popa, Thomas Rockmann, Henry Holmstrand, Krishnakant Budhavant, Orjan Gustafsson
Summary: South Asian air pollution, particularly carbon monoxide, is a major concern for climate and air quality. Research indicates that combustion emissions are the primary source of CO in South Asia during winter, which is significantly higher than the global average.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
J. M. Fernandez, H. Maazallahi, J. L. France, M. Menoud, M. Corbu, M. Ardelean, A. Calcan, A. Townsend-Small, C. van der Veen, R. E. Fisher, D. Lowry, E. G. Nisbet, T. Rockmann
Summary: Atmospheric methane continues to increase and it is crucial to target specific anthropogenic source categories for emissions reduction. In Bucharest, Romania, mobile measurement techniques were used to locate street-level methane leaks and determine their sources. The study found a significant number of leak indications, with a majority attributed to biogenic wastewater and natural gas. Bucharest's methane emissions exceeded those of Hamburg and Paris.
ATMOSPHERIC ENVIRONMENT-X
(2022)
Article
Environmental Sciences
Peng Yao, Elena Chianese, Norbertas Kairys, Rupert Holzinger, Dusan Materic, Carmina Sirignano, Angelo Riccio, Haiyan Ni, Ru-Jin Huang, Ulrike Dusek
Summary: The chemical composition and stable carbon isotopic composition of organic aerosol particles emitted by a shuttle passenger ship in Italy were investigated. Methylsiloxanes and their derivatives were identified in the ship emissions for the first time, and their presence was supported by the low carbon isotopic values. These methylsiloxanes are likely to come from engine lubricants.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Environmental Sciences
Dusan Materic, Helle Astrid Kjaer, Paul Vallelonga, Jean-Louis Tison, Thomas Rockmann, Rupert Holzinger
Summary: It has been established that various anthropogenic contaminants have already reached all the world's pristine locations, including the polar regions. Plastic pollution has been shown as a durable novel pollutant, and, since recently, smaller and smaller plastics particles have been identified in various environments (air, water and soil). However, far less is known about the plastics debris that fragmented to the sub-micrometre size (nanoplastics).
ENVIRONMENTAL RESEARCH
(2022)
Article
Multidisciplinary Sciences
Jordi Vila-Guerau de Arellano, Oscar Hartogensis, Imme Benedict, Hugo de Boer, Peter J. M. Bosman, Santiago Botia, Micael Amore Cecchini, Kim A. P. Faassen, Raquel Gonzalez-Armas, Kevin van Diepen, Bert G. Heusinkveld, Martin Janssens, Felipe Lobos-Roco, Ingrid T. Luijkx, Luiz A. T. Machado, Mary Rose Mangan, Arnold F. Moene, Wouter B. Mol, Michiel van der Molen, Robbert Moonen, H. G. Ouwersloot, So-Won Park, Xabier Pedruzo-Bagazgoitia, Thomas Roeckmann, Getachew Agmuas Adnew, Reinder Ronda, Martin Sikma, Ruben Schulte, Bart J. H. van Stratum, Menno A. Veerman, Margreet C. van Zanten, Chiel C. van Heerwaarden
Summary: Vegetation and atmosphere processes are interconnected through various interactions, including plant transpiration, carbon dioxide assimilation, turbulent transport, aerosol formation, moist convection, and precipitation. The challenges ahead involve understanding the impact of clouds and canopies on radiation transfer, spatial distribution of radiative energy, interaction between local processes and regional meteorology, and integration of feedbacks between cloud radiative effects and plant physiology. To address these challenges, the proposed methodology combines fine-scale simulations with new observational techniques to study the role of small-scale spatiotemporal processes in weather and climate models.
ANNALS OF THE NEW YORK ACADEMY OF SCIENCES
(2023)
Article
Environmental Sciences
Annalisa Delre, Maaike Goudriaan, Victor Hernando Morales, Annika Vaksmaa, Rachel Tintswalo Ndhlovu, Marianne Baas, Edwin Keijzer, Tim de Groot, Emna Zeghal, Matthias Egger, Thomas Rockmann, Helge Niemann
Summary: Ocean plastic pollution is a growing problem, but the actual amount of plastic at the sea surface is lower than expected. UV radiation can induce photodegradation, resulting in the release of dissolved organic carbon and other gases. Based on their findings, the authors conclude that solar UV radiation may have already degraded a significant percentage of floating plastic in the ocean.
MARINE POLLUTION BULLETIN
(2023)
Article
Environmental Sciences
Florian Dietrich, Jia Chen, Ankit Shekhar, Sebastian Lober, Konstantin Kraemer, Graham Leggett, Carina van der Veen, Ilona Velzeboer, Hugo Denier van der Gon, Thomas Rockmann
Summary: Natural gas is considered a bridging technology in the energy transition due to its lower carbon emissions compared to coal. However, leaks can release methane into the atmosphere, significantly increasing the carbon footprint of natural gas. A study compared the climate impacts of gas-powered and electricity-powered appliances, using the Munich Oktoberfest as a case study and extending it to 25 major natural gas consuming countries. The study found that electricity has been the more climate-friendly energy source at Oktoberfest since 2005, but natural gas still produces lower carbon emissions than electricity for end-user appliances in 18 out of 25 countries studied. As the share of renewable energy increases, the carbon footprint of electricity will likely surpass that of natural gas in these countries in the future. These findings can inform the debate on addressing climate change effectively.
Article
Environmental Sciences
Olga M. Zygadlowska, Jessica Venetz, Robin Klomp, Wytze K. Lenstra, Niels A. G. M. van Helmond, Thomas Rockmann, Anna J. Wallenius, Paula Dalcin Martins, Annelies J. Veraart, Mike S. M. Jetten, Caroline P. Slomp
Summary: This study investigates the production and fate of methane (CH4) in the sediments of Lake Grevelingen, the Netherlands. The results show that under oxygenated conditions, methane is partially removed through oxidation, while under anoxic conditions, it accumulates in the bottom waters. The study also suggests a potential role of metal oxides in methane removal.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Environmental
Peng Yao, Rupert Holzinger, Dusan Materic, Beatriz Sayuri Oyama, Maria de Fatima Andrade, Dipayan Paul, Haiyan Ni, Hanne Noto, Ru-Jin Huang, Ulrike Dusek
Summary: Methylsiloxanes, which are toxic to organisms, have been identified in aerosol samples collected in tunnels in Sao Paulo, Brazil, indicating the presence of these emerging pollutants in vehicle emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Euan G. Nisbet, Martin R. Manning, Ed J. Dlugokencky, Sylvia Englund Michel, Xin Lan, Thomas Rockmann, Hugo A. C. Denier van der Gon, Jochen Schmitt, Paul I. Palmer, Michael N. Dyonisius, Youmi Oh, Rebecca E. Fisher, David Lowry, James L. France, James W. C. White, Gordon Brailsford, Tony Bromley
Summary: The rapid growth of atmospheric methane since late 2006 is unprecedented. Increased natural emissions over the tropics, likely in response to anthropogenic climate forcing, have been attributed to a large fraction of this atmospheric growth. Isotopically lighter measurements of delta(13)C(CH4) suggest that the recent increase in atmospheric methane is primarily driven by increased emissions from microbial sources, especially wetlands. The global methane budget is currently imbalanced and new inputs are poorly quantified. While microbial emissions from agriculture and waste sources may have increased between 2006 and 2022 by about 35 Tg/yr, there is also a possibility that another 35-45 Tg/yr of the recent net growth in methane emissions is driven by natural biogenic processes, particularly wetlands responding to climate change. Model comparisons indicate that recent changes may be comparable or even greater in scale and speed than methane's growth and isotopic shift during past glacial/interglacial termination events. It is uncertain if methane's current growth falls within the range of Holocene variability, but it is also possible that the recent growth and isotopic shift of methane may indicate a large-scale reorganization of the natural climate and biosphere.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Environmental Sciences
Truls Andersen, Zhao Zhao, Marcel de Vries, Jaroslaw Necki, Justyna Swolkien, Malika Menoud, Thomas Roeckmann, Anke Roiger, Andreas Fix, Wouter Peters, Huilin Chen
Summary: Coal mining accounts for 12% of global anthropogenic methane emissions, and the Upper Silesian Coal Basin in Poland is a hotspot for methane emissions in Europe. By using a UAV-based active AirCore system, methane concentrations were measured near ventilation shafts and showed a high correlation with hourly emission inventory data, making it possible to estimate regional methane emissions.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Bryce F. J. Kelly, Xinyi Lu, Stephen J. Harris, Bruno G. Neininger, Jorg M. Hacker, Stefan Schwietzke, Rebecca E. Fisher, James L. France, Euan G. Nisbet, David Lowry, Carina van der Veen, Malika Menoud, Thomas Rockmann
Summary: In-flight atmospheric δC-13 measurements used in conjunction with endmember mixing modeling of CH4 sources are powerful tools for verification of bottom-up inventories.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Malika Menoud, Carina van der Veen, Dave Lowry, Julianne M. Fernandez, Semra Bakkaloglu, James L. France, Rebecca E. Fisher, Hossein Maazallahi, Mila Stanisavljevic, Jaroslaw Necki, Katarina Vinkovic, Patryk Lakomiec, Janne Rinne, Piotr Korben, Martina Schmidt, Sara Defratyka, Camille Yver-Kwok, Truls Andersen, Huilin Chen, Thomas Rockmann
Summary: This study provides a better method for estimating CH4 emission sources by measuring the isotope signatures of different sources and presents a new global database. The results indicate that microbial sources are well described, while there is significant variability in the isotope compositions of fossil fuel sources, requiring careful selection of weighting criteria.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Engineering, Environmental
Steve Allen, Dusan Materic, Deonie Allen, Anna MacDonald, Rupert Holzinger, Gael Le Roux, Vernon R. Phoenix
Summary: The existence of nano-sized plastic (NP) has been widely discussed in recent years, but there is limited physical evidence and direct comparison to microplastics. This study compared microplastic (MP) particles and counts (>10 μm) to nano-sized plastic particle (<0.45 μm) mass concentrations from atmospheric deposition in the French Pyrenees. The results showed that the quantity of nano-sized plastic may be similar to microplastics in this atmospheric deposition, but the particle count for nano-sized plastic is significantly higher. Backward trajectory modeling indicated the extended spatial influence and elevated levels of nano-sized plastic over a 7-day period.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2022)
Article
Environmental Sciences
Stephen M. Platt, Oystein Hov, Torunn Berg, Knut Breivik, Sabine Eckhardt, Konstantinos Eleftheriadis, Nikolaos Evangeliou, Markus Fiebig, Rebecca Fisher, Georg Hansen, Hans-Christen Hansson, Jost Heintzenberg, Ove Hermansen, Dominic Heslin-Rees, Kim Holmen, Stephen Hudson, Roland Kallenborn, Radovan Krejci, Terje Krognes, Steinar Larssen, David Lowry, Cathrine Lund Myhre, Chris Lunder, Euan Nisbet, Pernilla B. Nizzetto, Ki-Tae Park, Christina A. Pedersen, Katrine Aspmo Pfaffhuber, Thomas Rockmann, Norbert Schmidbauer, Sverre Solberg, Andreas Stohl, Johan Strom, Tove Svendby, Peter Tunved, Kjersti Tornkvist, Carina van der Veen, Stergios Vratolis, Young Jun Yoon, Karl Espen Yttri, Paul Zieger, Wenche Aas, Kjetil Torseth
Summary: The Zeppelin Observatory is an important atmospheric measurement site located on Zeppelin Mountain in the Svalbard archipelago. It is part of several European and global monitoring programmes and research infrastructures. This article provides details on the establishment of the observatory and presents a review of the current state of the European Arctic atmosphere and future research directions.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)
