Article
Agriculture, Dairy & Animal Science
Zhifang Shi, Lei Xi, Xin Zhao
Summary: This study measured ammonia and hydrogen sulfide from 11 barns in 3 dairy farms in central China and calculated the average daily emission rates for these two gases. The results showed high concentrations of ammonia and hydrogen sulfide produced by cows during winter 2020, indicating the need for more specific measures to reduce the uncertainties of ammonia emissions from dairy cow production in China.
Article
Agriculture, Dairy & Animal Science
Sanne van Gastelen, Hendrik Jan van Dooren, Andre Bannink
Summary: The purpose of this study was to evaluate the balance between enteric and manure CH4 emissions from cows and to assess the magnitude of synergistic effects for CH4 and nitrogenous emissions. The results showed that when corn silage was replaced with grass silage in the diet, enteric CH4 and cow-associated NH3 and N2O emissions were relatively lower. However, the emissions of CH4 and N2O from stored manure were not affected by the diet, while NH3 emission tended to be lower.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Alan Rotz, Robert Stout, April Leytem, Gary Feyereisen, Heidi Waldrip, Greg Thoma, Michael Holly, David Bjorneberg, John Baker, Peter Vadas, Peter Kleinman
Summary: Through simulation of dairy farms in different regions, it was found that the dairy industry in the United States has a certain impact on national environmental indicators such as greenhouse gas emissions, fossil energy use, water resources, and nitrogen loss. While the environmental footprint of dairy farms in the U.S. is relatively small in the national context, their contribution to reactive nitrogen losses is significant.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Fan Yang, Yuhua Han, Haitao Bi, Xiao Wei, Wenhai Luo, Guoxue Li
Summary: The study found significant variations in NH3 emission rates across different areas of the dairy farms, primarily influenced by ambient temperature, with the outdoor exercise area being the main contributor to NH3 emissions. Strong relationships between NH3 emissions and relative humidity were found in some areas, with NH3 emission rates depending on floor material and manure collection frequency.
Article
Environmental Sciences
Fangle Chang, Eileen Fabian-Wheeler, Tom L. Richard, Michael Hile
Summary: The waste management practices of solid dairy manures were experimentally evaluated to investigate gas transport and emission within manure piles. Using different applied stresses and moisture contents, representing various pile depths, the concentrations of greenhouse gases and ammonia were measured by Fourier-transform infrared spectroscopy monitor. The results showed that carbon dioxide was the dominant greenhouse gas emission under all tested conditions. The gas diffusion, facilitated by manure with high mechanical strength and permeability, played a crucial role in gas transfer. Moreover, the increase in moisture content significantly reduced the gas emission rates, especially for manure with high water holding capacity.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agriculture, Multidisciplinary
Rana Genedy, Jactone Ogejo
Summary: Storing manure can be beneficial for dairy farms in terms of maximizing fertilizer value, reducing costs, and minimizing environmental pollution. However, it also poses the risk of nitrogen loss through ammonia volatilization. This study quantifies ammonia loss from manure stored in a clay pit at a dairy farm and provides valuable information for developing mitigation strategies.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Agricultural Engineering
Carsten C. A. Schep, Hendrik Jan H. J. C. van Dooren, Peter P. W. G. Groot Koerkamp, Nico N. W. M. Ogink
Summary: This study investigated the effect of closing off the slurry pit on NH3 emissions and developed a method to quantify the air flow rate in the pit. The results showed that the pit ventilation rate was temperature dependent and exhibited a clear day-night pattern during the night.
BIOSYSTEMS ENGINEERING
(2022)
Article
Energy & Fuels
Surasit Thiangchanta, Rungnapha Khiewwijit, Yuttana Mona
Summary: This study aims to explore the environmental impact of biogas production from dairy cow manure. The results show that the diets of dairy cows have an effect on biogas production, CO2 and CH4 contents, and total greenhouse gas emissions. The use of biogas significantly reduces greenhouse gas emissions compared to natural gas.
Article
Environmental Sciences
Sabine Schrade, Kerstin Zeyer, Joachim Mohn, Michael Zahner
Summary: Reducing crude protein in the diet can decrease nitrogen excretion and emissions of ammonia and nitrous oxide by dairy cattle. The composition of the diet may also affect methane and carbon dioxide emissions. A study in Switzerland examined the impact of diets with different protein levels on emissions of NH3 and greenhouse gases on a practical scale.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Zhenhan Duan, Peter Kjeldsen, Charlotte Scheutz
Summary: Landfills are a significant source of anthropogenic methane emissions globally. This paper examines the gas collection efficiencies of 23 Danish landfills and proposes using these values to regulate methane emissions in Denmark. The study finds that the gas collection efficiency in Danish landfills is lower than in Swedish, UK and US landfills, potentially due to factors such as shallow gas collection pipes, leakage from installations, and low gas production. It suggests using gas collection efficiency as a regulatory tool to achieve methane mitigation goals in landfills.
Article
Engineering, Environmental
Anders Michael Fredenslund, Einar Gudmundsson, Julie Maria Falk, Charlotte Scheutz
Summary: This study involved 69 biogas plants in Denmark, which represented 59% of the country's biogas production, in an effort to reduce methane emissions. Various measurements and assessments were conducted to determine emission rates, sources, and potential mitigation strategies. The findings showed variations in emission rates and losses between different types of plants, with pressure relief valves being a commonly observed source of leakage. The study also determined a national emission factor for Danish biogas production and demonstrated the effectiveness of mitigating actions in reducing emissions.
Article
Environmental Sciences
Anna Rychla, Barbara Amon, Melynda Hassouna, Tony J. van der Weerden, Wilfried Winiwarter
Summary: Understanding the costs of emission abatement measures is crucial for effective reduction efforts. This study summarizes and discusses current knowledge on costs and effects of selected ammonia mitigation measures in livestock production. The results show significant differences between countries and models, influenced by system boundaries, geographic and structural conditions. More consistent assessments are needed to improve the evaluation base for other abatement options.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Construction & Building Technology
Ilan Arvelo, Frank Pagone, Jacob Persky, Carlos E. Carpio, Phil Arnold, Nicholas Clements
Summary: Current gas and aerosol tracers cannot accurately simulate the emission and transmission of liquid aerosols containing pathogens indoors. This study evaluated the use of a liquid aerosol tracer containing synthetic DNA to simulate the particle size distribution of aerosols containing DNA. The results showed that DNA-tagged tracer aerosols can effectively simulate the emission and transport of liquid aerosols in a room, and the decay rate of DNA tracer concentrations can be used to evaluate the effectiveness of aerosol control strategies.
BUILDING AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Takumi Yamamoto, Yoshika Sekine, Koki Sohara, Satoshi Nakai, Yukio Yanagisawa
Summary: This study aimed to investigate the emission behavior of ammonia in heated tobacco products. The results showed that the emission amount of ammonia increased with higher heating temperatures, and the distribution of ammonia in gas and particle phases was also influenced by the heating temperature.
Article
Agriculture, Multidisciplinary
Provvidenza Rita D'Urso, Claudia Arcidiacono, Francesca Valenti, David Janke, Giovanni Cascone
Summary: The infrared photoacoustic spectroscopy was used to measure ammonia concentrations in a semi-open dairy barn. The number of repetitions significantly affected the variability of measurements. It is recommended to perform three to four repetitions, exclude the first one, and consider the mean value of the second and third repetitions as the NH3 concentration value for each sampling location.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2023)
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)