Article
Geosciences, Multidisciplinary
Dawei Gao, Honn Kao, Bei Wang, Ryan Visser, Ryan Schultz, Rebecca M. Harrington
Summary: This study reveals that earthquakes induced by hydraulic fracturing can have delayed triggering controlled by local hydrogeological conditions. Poroelastic effects may contribute to induced seismicity, but the presence of adequate hydrological paths is necessary. Delayed triggering is caused by pore-pressure build-up along pre-existing faults, facilitating seismic failure.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Tamzin A. Blewett, Aaron Boyd, Erik J. Folkerts, Katherine N. Snihur, Daniel S. Alessi, Greg Goss
Summary: This study found that temperature and high ionic concentration are the primary factors affecting the accumulation of phenanthrene in rainbow trout, with different effects observed at different temperatures.
ENVIRONMENTAL POLLUTION
(2021)
Article
Geochemistry & Geophysics
Mauricio Reyes Canales, German Rodriguez-Pradilla, Javad Yusifbayov, Mirko van der Baan
Summary: The study analyzed the induced seismicity related to hydraulic fracturing activities in the Duvernay Formation near Fox Creek, Alberta, Canada. It found that the seismic hazard has consistently decreased since 2015, with distinct features in Eastern and Western regions, while no seismic activity was observed in hydraulic fracturing areas. The decreasing seismic hazard may be associated with changes in fracturing operations and mitigation strategies, along with additional regulatory implementations to prevent significant seismic events.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Marine & Freshwater Biology
Erik J. Folkerts, Daniel S. Alessi, Greg G. Goss
Summary: Technologies associated with hydraulic fracturing are widely used worldwide, leading to increased production of flowback and produced water (FPW). However, there is limited research on the long-term effects of FPW exposure on ecosystems and organisms. This study found that in ovo exposure to FPW during critical cardiac developmental stages can significantly impair the heart morphology and swimming performance of juvenile trout, both in acute and chronic exposure scenarios.
AQUATIC TOXICOLOGY
(2023)
Article
Environmental Sciences
Lara J. Cushing, Khang Chau, Meredith Franklin, Jill E. Johnston
Summary: Advances in unconventional extraction techniques have increased fossil fuel production rates in the US, leading to a rise in intentional combustion (flaring) from unconventional oil and gas development which may expose nearby residents to toxic air pollutants, light pollution, and noise. The study used satellite observations, census data, and building footprints to estimate nightly flaring events across oil shale plays in the contiguous US, finding that three basins accounted for over 83% of all UOG flaring activity. The research estimated that over half a million people reside within 5 km of a flare in these basins, with a disproportionate exposure of black, indigenous, and people of color to flaring.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Alaa El-Din H. Sayed, Shaimaa K. Idriss, Sary Kh. Abdel-Ghaffar, Asmaa A. A. Hussein
Summary: The study examined the DNA damage response in erythrocytes of fish exposed to volatile organic compounds (VOCs), finding evidence of genotoxic effects and potential biomarkers for environmental pollution. Despite the dangers of VOCs, little is known about their hemotoxic, cytotoxic, and genotoxic effects on fish. The research optimized an assay method to measure apoptosis and DNA damage in erythrocytes of tilapia fish exposed to benzene, toluene, and xylene and identified the highest levels of apoptosis, DNA damage, and histopathological alterations in fish exposed to benzene.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Andre Luiz N. Silva, Robson Andrade Rodrigues, Mayara Schueroff Siqueira, Karine Nathiele Nogueira Farias, Karin Virginia Kuibida, Lilian Franco-Belussi, Carlos E. Fernandes
Summary: The study found that exposure to DFB induced irreversible damage to the liver of Pacu fish, especially in the 60 and 120-minute baths. In addition, levels of transaminases increased, and liver morphology changed in exposed fish.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Adebayo Oluwaseun Ojo, Honn Kao, Ryan Visser, Chet Goerzen
Summary: This study investigates the spatiotemporal changes of seismic velocity during the completion of hydraulic fracturing wells in the Fox Creek area, Alberta, Canada. It reveals a temporal correlation between velocity decreases and seismic activity, likely due to stress-induced subsurface deformation. By comparing injection parameters, it shows a correlation between induced seismicity and reduction in dv/v.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Hongwei Zhang, Zhenzhong Shen, Liqun Xu, Lei Gan, Detan Liu, Qiong Wu, Jiacheng Tan, Yiqing Sun, Zekai Ma
Summary: This study investigates the hydraulic fracturing behavior of sulfate-attacked cement-based materials under tensile stress. Experimental results show that the critical water pressure initially increases and then decreases with increasing immersion time, consistent with the evolution of tensile strength. A critical water pressure model and an evolution mechanism are proposed, and a semi-empirical function is developed to predict the critical water pressure. Effective strategies to prevent hydraulic fracturing include reducing porosity and tensile stress, increasing matrix tensile strength, and releasing expansion stress.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Analytical
Molly C. McLaughlin, Bonnie McDevitt, Hannah Miller, Kaela K. Amundson, Michael J. Wilkins, Nathaniel R. Warner, Jens Blotevogel, Thomas Borch
Summary: This study investigated the efficacy of constructed wetlands in removing organic chemical additives from produced water and their environmental fate. The results showed that CW systems were able to effectively remove chemical additives from produced water, although these additives were still present in sediment samples collected downstream of discharges.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2021)
Article
Environmental Sciences
Si-Qi Zhang, Ping Li, Xue-Li Zhao, Shu-Wen He, Shao-Ying Xing, Zhi-Han Cao, Hai-Qi Zhang, Zhi-Hua Li
Summary: This study found that environmental concentrations of norfloxacin can induce toxic effects on carp liver, resulting in changes in genes related to lipid metabolism, immune response, and cytochrome P450 metabolism, as well as increased risk of nonalcoholic fatty liver disease. Biochemical indicators showed significant changes in total cholesterol, triglycerides, glucose, and insulin levels. Moreover, exposure to norfloxacin at environmental concentrations can disrupt glucose and lipid metabolism in carp.
Article
Biochemistry & Molecular Biology
Alaide Cristina de Bem Matos, Caroline Kuhnen Lima, Mariele Abadia Elias, Indianara Fernanda Barcarolli, Carla Ivane Ganz Vogel, Karim Hahn Luchmann
Summary: The indiscriminate use of pesticides has resulted in environmental contamination and pest resistance, prompting the development of less hazardous formulations. This study investigated the potential toxic effects of the commercial insecticide ZEUS (R) on tilapia, revealing alterations in biochemical markers and histological changes in the fish following exposure. The findings highlight the need for further understanding of the toxicity effects of ZEUS (R) and suggest that the commercial mixture may have similar or even lower adverse effects on freshwater fish compared to individual compounds.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2022)
Article
Energy & Fuels
Justin Mackey, James Gardiner, Barbara Kutchko, Meghan Brandi, James Fazio, J. Alexandra Hakala
Summary: The study found that hydraulic fracturing fluids may have deleterious effects on the wellbore before production of the well begins, leading to barite precipitation and corrosion-related precipitates.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Elif Kaval Oguz, Burcu Ergoz, Ahmet R. Oguz
Summary: The study found that exposure to sublethal concentrations of TEB resulted in histopathological changes in the gill, liver, and kidney tissues of Van fish.
CHEMISTRY AND ECOLOGY
(2022)
Article
Energy & Fuels
Qiuguo Li, Elena Konstantinovskaya, Alexey Zhmodik, Charles Ibelegbu
Summary: The interaction between natural fractures and hydraulic fractures can lead to lateral fluid propagation in unconventional reservoirs, causing rapid fluid pressure transmission to fault zones and potential fault shear slip reactivation and induced seismicity. In the Western Canada Sedimentary Basin, several induced earthquakes (up to 4.1 Mw) have occurred during hydraulic fracturing of the Upper Devonian Duvernay Formation since 2013. This study aims to investigate the interaction of natural fractures and hydraulic fractures in the area south of Fox Creek, where a linear zone of induced earthquakes (up to 3.9 Mw) occurred along a fault in 2015 during hydraulic fracturing of horizontal wells. Hydraulic fracture modeling, reservoir simulations, and 3D coupled reservoir-geomechanical modeling are used to analyze the growth of hydraulic fractures, fluid transmission, and fluid pressure buildup around treatment wells.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
