Article
Geosciences, Multidisciplinary
Zhengyu Xia, Jakub Surma, Matthew J. Winnick
Summary: The new excess term, Delta ' 17O, of the triple oxygen isotope composition is proposed as a tracer for kinetic fractionation in the water cycle. The objective is to compare and analyze the variations in Delta ' 17O and dexcess resulting from isotopic fractionation in each step of the water cycle, and explore their different responses and sensitivities to hydroclimate processes.
EARTH-SCIENCE REVIEWS
(2023)
Article
Environmental Sciences
Liyuan Sang, Guofeng Zhu, Yuanxiao Xu, Zhigang Sun, Zhuanxia Zhang, Huali Tong
Summary: Agricultural reservoirs in arid regions increase water stresses and threaten the sustainability of water resources. Limited research on their effects hampers a comprehensive assessment of sustainable water use. This study uses stable isotopes to evaluate the impact of agricultural reservoirs on hydrology, showing that they alter local hydrologic patterns, increasing evaporation and enriching the water near the reservoir. The cumulative effect of multiple reservoirs profoundly alters hydrologic processes, leading to evaporation-led water loss in inland river basins.
WATER RESOURCES RESEARCH
(2023)
Article
Engineering, Chemical
Nicholas C. Means, Daniel J. Haynes, Robert M. Enick, Bret H. Howard, Dushyant Shekhawat
Summary: Hydrogen isotope separation can be achieved using a palladium (Pd) membrane due to the different solubility, diffusivity, and permeability of protium (H) and deuterium (D) in Pd. The permeability of H (k(H2)) and D (k(D2)) were studied at various temperatures and pressures using a Pd membrane separation unit. The selectivity of the Pd membrane towards H2 increases with temperature but decreases at higher temperatures due to the influence of competitive transport and isotope diffusion.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Environmental Sciences
David Dominguez-Villar, Kristina Krklec, Ian Boomer, Ian J. Fairchild
Summary: The isotope signature of cave waters was studied using the ISODRIP model based on data from Eagle Cave in central Spain. The results indicate that various factors, including flow routes, influence the isotopic signals of cave waters significantly.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Risako Tanii, Ryota Ogawa, Hisayoshi Matsushima, Mikito Ueda, Richard Dawson
Summary: This study investigates deuterium separation using two types of AFCs with different catalysts and finds a mass transportation limitation at Ru catalyst leading to a decrease in voltage. The slow reaction rate of D-2 gas on Ru catalyst is supported by AC impedance measurements. Experimental results show that deuterium is diluted with Pt catalyst but concentrated with Ru catalyst, possibly due to differences in adsorption energy on the catalyst surface.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Environmental Sciences
Chijun Sun, Lijun Tian, Timothy M. Shanahan, Judson W. Partin, Yongli Gao, Natasha Piatrunia, Jay Banner
Summary: This study investigates the isotopic composition of rainfall during Hurricane Harvey in central Texas in 2017. It finds that tropical cyclones produce rainfall with negative isotope values, which can serve as a proxy to reconstruct past cyclones. The changes in isotopic values are influenced by microphysical processes associated with the storm.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
Article
Environmental Sciences
Dejuan Jiang, Zhi Li, Yongming Luo, Yun Xia
Summary: This study focused on the impacts of river damming and drought on water cycle dynamics using stable water isotopes. The results indicate that the combined effects of cascade dams and drought greatly influence water resource management by exacerbating water shortage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Xiaolin Liu, Chenxi Liu, Xiaojuan Song, Xu Ding, Hailong Wang, Baoqiu Yu, Heyuan Liu, Bin Han, Xiyou Li, Jianzhuang Jiang
Summary: In this study, a comprehensive investigation on the photophysical behaviors and CO2 reduction electrocatalytic properties of cofacial porphyrin organic cages (CPOCs) was conducted. These CPOCs were constructed through covalent-bonded self-assembly and post-synthetic metalation. The results revealed weak electronic coupling between the donor and acceptor units in the metal-free cage and fast energy transfer from porphyrin to the acceptor unit upon photoexcitation. Furthermore, CPOC-Co exhibited significantly higher electrocatalytic activity for CO2 reduction compared to other metallic CPOCs and monomeric porphyrin cobalt compartment.
Article
Geosciences, Multidisciplinary
Zhengyu Xia
Summary: By using a new atmospheric moisture flow dataset, this study diagnoses the OMS regions and conditions globally and finds that OMS temperature and relative humidity together explain 41% of the variability in monthly mean precipitation d-excess in low- and mid-latitudes. The study also shows the distinguishable sensitivity between d-excess and Delta ' O-17 to OMS temperature, as predicted by theory, based on a few sites with paired data. This research contributes to understanding the complex controls on precipitation d-excess and Delta ' O-17 by quantifying the crucial role of OMS dynamics.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Yi Liu, Chaoyu Zhang, Jiyi Jiang, Ying Zhang, Guanghao Wang, Liangliang Xu, Zhihui Qu
Summary: This study analyzed water samples from the Qujiang River Basin using various methods to examine the hydrochemical characteristics and water sources of surface water and groundwater. The findings indicate that water composition is influenced by rock weathering and precipitation, and groundwater primarily replenishes surface water. This research is significant for water resource management and conservation.
Article
Engineering, Civil
Andrew C. Smith, Melanie J. Leng, Suzanne McGowan, Virginia N. Panizzo, Thi Thu Trang Ngo, Thi Nguyet Minh Luu, Ioannis Matiatos, Thu Nga Do, Thi Thao Ta, Anh Duc Trinh
Summary: Anthropogenic activities have caused nitrate pollution and changes in the metabolic state of aquatic ecosystems in the Red River delta, Vietnam. Soil leachate, domestic waste, and agricultural fertilizers were identified as the main sources of nitrate. The delta's geographical location and seasonal changes affect the relative impact of each source. Low dissolved oxygen saturation in the river system is a concern due to high nitrate loads and inputs of organic matter from untreated waste.
JOURNAL OF HYDROLOGY
(2024)
Article
Green & Sustainable Science & Technology
Rukaiya Kausher, Rambabu Singh, Anand Kumar Sinha, Satya Narayan Sethy, Sudhir Kumar, Shatrudhan Pandey, Adham E. Ragab, Ahmed Mohamed
Summary: This study assessed the impact of coal mining activities on groundwater quality in the Mahan River catchment area, Chhattisgarh, India. Water samples from wells, river, and mine were analyzed using water quality indices, stable isotope ratios, and physicochemical parameters. Results showed that water quality was good during the pre-monsoon period, but deteriorated during the post-monsoon period, particularly in mining areas. Stable isotope analysis revealed non-equilibrium processes and mixing mechanisms.
Article
Engineering, Civil
Ke Chen, Doerthe Tetzlaff, Tobias Goldhammer, Jonas Freymueller, Songjun Wu, Aaron Andrew Smith, Axel Schmidt, Guodong Liu, Markus Venohr, Chris Soulsby
Summary: Understanding the hydrology of large catchments is challenging due to their spatial heterogeneity. This study used seasonal surveys to characterize the water isotopes in the River Spree catchment in Germany, revealing complex hydrological processes influenced by reservoir releases, wetlands, and water abstractions. These findings have implications for sustainable water management in the future.
JOURNAL OF HYDROLOGY
(2023)
Article
Water Resources
Laszlo Palcsu, Alena Gessert, Marianna Turi, Attila Kovacs, Istvan Futo, Judit Orsovszki, Anita Puskas-Preszner, Marjan Temovski, Gabriella Koltai
Summary: Our study focuses on three karst regions in Hungary and Slovakia, examining the response of discharging karst waters to recharge using environmental tracers. The results demonstrate the importance of sampling frequency in detecting short residence times and highlight the significance of long-term time series for better estimation of age distribution in karst water systems. The study findings suggest that shallow springs have short residence times, with H-3/He-3 and SF6 apparent ages confirming this to be between 0 and 10 years.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)
Article
Plant Sciences
Teresa E. Gimeno, Zsofia R. Stangl, Adria Barbeta, Noelia Saavedra, Lisa Wingate, Nicolas Devert, John D. Marshall
Summary: The research suggests that water uptake through bark may be more common than previously thought, with water being absorbed primarily through the liquid phase rather than vapor exchange. This water taken up through the bark could be incorporated into the transpiration stream, implying that sap-flow measurements may underestimate transpiration when the bark is wet.
PLANT CELL AND ENVIRONMENT
(2022)
