Article
Environmental Sciences
Hezhong Yuan, Bingchan Jia, Qingfei Zeng, Yanwen Zhou, Juan Wu, Haixiang Wang, Hao Fang, Yiwei Cai, Qiang Li
Summary: This study assessed the impact of dissimilatory nitrate reduction on the phosphorus cycle in lacustrine sediment. The results showed that nitrate reduction facilitated the accumulation of phosphorus in lake water. The synchronous control of nitrogen and phosphorus is crucial for the management and restoration of lake eutrophication.
Article
Environmental Sciences
Joseph L. Domagalski, Eric Morway, Nancy L. Alvarez, Juliet Hutchins, Michael R. Rosen, Robert Coats
Summary: A study of Lake Tahoe found that the lake's water quality is declining due to algae and fine sediment, leading to a decrease in water clarity. To maintain water clarity, wastewater is exported out of the basin. Over the past 25 years, nitrate loads have decreased, while ammonium loads initially decreased and then continued to increase after 2005, and organic phosphate loads showed significant increases between 2000 and 2005.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Ziqi Gao, Cesunica E. Ivey, Charles L. Blanchard, Khanh Do, Sang-Mi Lee, Armistead G. Russell
Summary: The chemical composition of PM2.5 has a significant impact on human health and air quality. Assessing and quantifying the impacts of various factors on PM2.5 chemical components can guide effective regulations to improve air quality. Generalized additive models (GAMs) were used to assess the factors affecting different PM2.5 species in the South Coast Air Basin. Results show that precursor emissions have the most significant effect on PM2.5 species production, while meteorological factors also influence PM2.5 composition. In the future, meteorological factors will become more significant in affecting PM2.5 speciation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Tianlun Ren, Kaili Ren, Mingzhen Wang, Mengying Liu, Ziqiang Wang, Hongjing Wang, Xiaonian Li, Liang Wang, You Xu
Summary: In this study, Cu nanowires with concave-convex surface Cu2+1O layers were prepared for efficient nitrate electroreduction to ammonia. The electronic interactions and interface effects between Cu and Cu2+1O contribute to the improved electroreduction ability over the Cu@Cu2+1O NWs. Tailoring surface/interface properties and atom structure can lead to highly efficient electrocatalysts for ammonia synthesis.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Plant Sciences
Liuyin Li, Xiuzhi Zang, Jianbo Liu, Jinfeng Ren, Zhenlin Wang, Dongqing Yang
Summary: In this study, physiological and weighted gene co-expression network analysis were used to investigate the mechanism of nitrate regulation on wheat root growth to alleviate ammonium toxicity. The results showed that increasing nitrate supply improved root growth and reduced ammonium toxicity. The regulation of root growth involved ROS, hormonal crosstalk, and transcription factors.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Olga Kozaderova, Oleg Kozaderov, Sabukhi Niftaliev
Summary: This paper describes an experimental study and mathematical simulation of the electromembrane transfer of weak electrolyte cations (specifically ammonium ions), hindered by hydrolysis reactions in the surface layers of the cation exchange membrane. By using the finite element method, a solution was found for the diffusion-kinetic electrodialysis problem in potentiostatic mode. Based on experimental data and theoretical simulation results, the effect of hydrolysis on concentration polarization in the electromembrane system and the transport characteristics of ions were analyzed, and a mechanism for the transfer of components in the ammonium nitrate solution through the cation exchange membrane was suggested.
Article
Environmental Sciences
Junsu Park, Eunhye Kim, Sangmin Oh, Haeri Kim, Soontae Kim, Yong Pyo Kim, Mijung Song
Summary: The study found that atmospheric ammonia significantly contributed to the formation of SNA during PM2.5 pollution episodes in urban areas through gas-to-particle conversion, especially under low temperature and high humidity conditions. The ratio of NH4+ to total NH3 increased with the concentration of PM2.5, indicating NH3 played an important role in SNA formation.
Article
Engineering, Environmental
Nathan Tomczyk, Laura Naslund, Carolyn Cummins, Emily V. Bell, Phillip Bumpers, Amy D. Rosemond
Summary: The Clean Water Act of 1972 delegates the implementation and enforcement authority to the states for regulating water quality in U.S. inland waters. This study examines the effectiveness of its nonpoint source provisions in reducing nutrient pollution by leveraging variations in state implementation. The results suggest that current federal policies for improving water quality are not achieving desired outcomes.
Article
Biotechnology & Applied Microbiology
Marit A. J. Nederlof, Am Ir Neori, Marc C. J. Verdegem, Aad C. Smaal, Henrice M. Jansen
Summary: This study examines the growth, tissue content, and nutrient removal rates of Ulva spp. when exposed to different nitrogen and phosphorus concentrations in a recirculating IMTA system. The results show that unfavorable N:P stoichiometry does not restrict Ulva spp. growth, high orthophosphate concentration is toxic to Ulva spp., and high nitrate concentration does not inhibit phosphorus uptake. The study highlights the importance of acclimatization periods and contributes to the understanding of sustainable and circular production techniques.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Environmental Sciences
Ryota Nojiri, Kazuo Osada, Yasunori Kurosaki, Masaya Matsuoka, Yasuhiro Sadanaga
Summary: This study investigates the factors affecting variations in gaseous nitric acid (HNO3) concentrations, particularly the long-range transport from the Asian continent. The authors conducted continuous observations from April 2016 to October 2017 in a coastal region near Tottori, Japan, and found that HNO3 concentrations and concentration ratios of HNO3 to total odd nitrogen species (HNO3/NOy) exhibited seasonal variations, with higher concentrations during spring-summer and lower concentrations during autumn-winter. They also observed similar diurnal variations in HNO3 concentrations and HNO3/NOy regardless of the season. These variations were attributed to the reaction of NO2 with OH radicals and/or the thermal decomposition of ammonium nitrate (NH4NO3) aerosols. Additionally, a thermodynamic evaluation was performed to assess the equilibria of HNO3 and gaseous ammonia (NH3) with NH4NO3, indicating that the thermal equilibrium of these species transported from the Asian continent could contribute to variations in HNO3 concentration in seasons other than summer.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Plant Sciences
Kazuhiro Sasaki, Mitsuhiro Obara
Summary: Roots are important for water and nutrient absorption in plants. Genetic resources that can improve the root system of rice have been identified. Novel QTLs that may control root length in rice have been discovered, which is significant for understanding the mechanism of root elongation in rice.
SOIL SCIENCE AND PLANT NUTRITION
(2022)
Article
Environmental Sciences
Zhihao Wu, Xia Jiang, Junyi Chen, Shuhang Wang, Cheng Yao
Summary: This research used DGT assemblies with different binding layers to study the mobility of N and P in sediments in Western Lake Taihu. The results provide important insights into the biogeochemical processes and nutrient release in lakes, which are crucial for effective nutrient management.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Microbiology
Shih-Yao Lin, Asif Hameed, Chia-Fang Tsai, Chiu-Chung Young
Summary: A Gram-stain-negative bacterium named Vineibacter terrae gen. nov., sp. nov. was isolated from vineyard soil in Taiwan. This bacterium is aerobic, non-motile, and capable of reducing nitrate, with optimal growth conditions at 30 degrees C and pH 7, belonging to the family Rhodospirillaceae.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2021)
Article
Computer Science, Artificial Intelligence
Martha Flores-Sosa, Ernesto Leon-Castro, Jose M. Merigo, Ronald R. Yager
Summary: This paper introduces the MLR-HOWA operator, which uses HOWA means to obtain beta values. It provides the possibility of under or overestimating results based on the decision maker's expectations and knowledge, allowing for analysis of multiple scenarios from minimum to maximum. The paper also presents the main properties of the operator and two extensions using induced and generalized variables. An application in exchange rate forecasting for five Latin American countries is provided, demonstrating that using different combinations of MLR with OWA operators can reduce forecasting errors.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Horticulture
Huanhuan Chen, Wenlang Hu, Yuwen Wang, Ping Zhang, Yi Zhou, Lin-Tong Yang, Yan Li, Li-Song Chen, Jiuxin Guo
Summary: Ammonium supply inhibits the growth of citrus seedlings, reduces photosynthetic nitrogen use efficiency, damages the photosynthetic electron transport chain, and increases reactive oxygen metabolism, with varying severity at different nitrogen levels.
SCIENTIA HORTICULTURAE
(2023)
Article
Construction & Building Technology
Yue Liu, Yan Zhuge, Christopher W. K. Chow, Alexandra Keegan, Jun Ma, Colin Hall, Danda Li, Phuong Ngoc Pham, Jianyin Huang, Weiwei Duan, Lei Wang
Summary: The study investigated the use of alum sludge ash (ASA) in cement-based composites, with varying percentages of 0%, 10%, 20%, and 30%. Results showed that the paste samples with 10% ASA exhibited higher pozzolanic reaction degree and homogenized indentation properties compared to those with 30% ASA. Excessive unreacted ASA may lead to a deterioration in the mechanical performance of the binder pastes.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Analytical
Jianyin Huang, Jodie Hills, Peter R. Teasdale, Jared G. Panther, Feiyue Wang, David T. Welsh
Summary: The study validated a DGT technique for determining lanthanide rare earth elements (REEs) in sediment pore waters, showing high sensitivity and reliability for measuring REE concentrations.
Review
Environmental Sciences
Danielle Hill, Tom Cresswell, William Bennett, Chantal Lanctot
Summary: Studies found that premetamorphic amphibians have higher metal concentrations than postmetamorphic ones, indicating that these metals can be largely excreted before or during metamorphosis. The concentrations of metals in the gut decreased from pre to postmetamorphic stages. Laboratory studies did not identify significant effects related to metamorphosis at concentrations below water quality standards, but delays in timing or growth were observed in field studies.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Jianyin Huang, Maximus Ghaly, Peter Hobson, Christopher W. K. Chow
Summary: The study investigates the effectiveness of hydrogen peroxide as an environmentally friendly alternative for controlling cyanobacterial blooms, finding that water quality and initial hydrogen peroxide dose can impact its decay characteristics, and that copper concentration and UV light significantly affect its decomposition.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jianyin Huang, Christopher W. K. Chow, Zhining Shi, Rolando Fabris, Amanda Mussared, Gary Hallas, Paul Monis, Bo Jin, Christopher P. Saint
Summary: The study found that during storm events, nitrate and DOC concentrations were negatively correlated with water level, while turbidity and total suspended solids were positively correlated with water level. Microbiological data, such as Escherichia coli, showed poor correlations with typical online parameters like nitrate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Orlando Lam-Gordillo, Luke M. Mosley, Stuart L. Simpson, David T. Welsh, Sabine Dittmann
Summary: The study found significant differences in benthic communities and functional traits across different sites, with higher abundance and more traits expressed in the estuarine region. The differences in benthic traits were correlated with sediment biogeochemistry and nutrient concentrations.
MARINE POLLUTION BULLETIN
(2022)
Article
Chemistry, Analytical
Casey L. Doolette, Daryl L. Howard, Nader Afshar, Cameron M. Kewish, David J. Paterson, Jianyin Huang, Stefan Wagner, Jakob Santner, Walter W. Wenzel, Tom Raimondo, Alexander T. De Vries Van Leeuwen, Lei Hou, Frederik van der Bom, Han Weng, Peter M. Kopittke, Enzo Lombi
Summary: Synchrotron-based X-ray fluorescence microscopy (XFM) analysis is a powerful technique for visualizing elemental distributions in various sample types. We developed a novel approach using two fluorescence detectors in tandem to acquire two sets of XFM data simultaneously, achieving high throughput and scanning large samples in XFM experiments.
ANALYTICAL CHEMISTRY
(2022)
Article
Environmental Sciences
Danielle J. Allen, Mark Farrell, Jianyin Huang, Chris Reynolds, Madhawa Rupasinghe, Luke M. Mosley
Summary: This study evaluated the long-term water quality trends and drivers of a constructed wetland in South Australia. The results showed that nitrogen was only partially removed by the wetland and served as a source of organic material and phosphorus. The removal efficiency of nitrogen was affected by hydraulic loading rates and varied with seasons and management practices. The findings highlight the importance of closely monitoring the long-term performance of constructed wetlands.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Danielle J. Allen, Mark Farrell, Jianyin Huang, Simon Plush, Luke M. Mosley
Summary: High organic loadings can lead to water quality problems in constructed wetlands, but artificial aeration can help mitigate these issues. This study compared the effects of baseline, continuous, and intermittent aeration on water quality in a free water surface constructed wetland. The results showed that aeration increased dissolved oxygen levels, but had no significant effect on other parameters such as nutrient concentrations.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This study demonstrates the utility of synchrotron-based X-ray spectroscopic techniques in investigating the geochemistry of vanadium in ancient marine sediments. The results show that vanadium is primarily hosted by phyllosilicate-III and is strongly associated with potassium-rich clay minerals. The findings suggest that differentiating authigenic and detrital vanadium in ancient marine sediments may not be possible, which has implications for vanadium isotope system studies.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Analytical
Krishantha Kodithuwakku, Jianyin Huang, Casey L. L. Doolette, Sean Mason, John Boland, Enzo Lombi, Niklas J. J. Lehto, Peter R. R. Teasdale
Summary: The availability of soil nitrogen for plant uptake can be affected by various soil factors, and conventional extraction techniques may affect the measurement of plant-available N concentrations. The diffusive gradients in thin-films (DGT) technique can overcome these limitations and has been successfully used to estimate the plant-available fractions of nutrients in soils. Therefore, evaluating the use of DGT for measuring NO3- and NH4+ in different soils and examining the factors affecting the plant-availability of these ions in soils is important.
ENVIRONMENTAL CHEMISTRY
(2022)
Correction
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Environmental Sciences
Danielle J. Allen, Jianyin Huang, Mark Farrell, Luke M. Mosley
Summary: The analysis of porewater concentrations in constructed wetland sediments using DET techniques revealed the sources and sinks of nutrients and their impact on water quality. Aeration of the water column improved oxygen levels and redox potential in the sediment, leading to decreased ammonium concentrations but increased phosphate and ferrous iron concentrations. Nitrate concentrations were below the detection limit, indicating limited nitrification-denitrification processes. The results highlight the usefulness of DET techniques in quantifying nutrient concentrations in constructed wetlands under different environmental conditions.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
William W. Bennett, Enzo Lombi, Kirk G. Scheckel, Ryo Sekine, Scott G. Johnston, Edward D. Burton, Daryl L. Howard, Peter Kappen, Donald E. Canfield
Summary: This paper presents the use of synchrotron-based X-ray techniques to investigate the vanadium host phases in ancient marine sediments. The results show that vanadium is mainly present as vanadium (III) hosted by phyllosilicate. Strong associations between vanadium and potassium suggest that vanadium is hosted by potassium-rich clay minerals. Differentiating authigenic and detrital vanadium in ancient marine sediments is unlikely due to similar chemical speciation for both fractions.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Geosciences, Multidisciplinary
Nicholas J. C. Doriean, William W. Bennett, John R. Spencer, Alexandra Garzon-Garcia, Joanne M. Burton, Peter R. Teasdale, David T. Welsh, Andrew P. Brooks
Summary: Gully erosion can significantly impact global river sediment budgets, with remediation efforts showing promising results in reducing suspended sediment and nutrient export. In a preliminary evaluation of landscape-scale gully remediation in the Great Barrier Reef catchment, a high level of financial and logistical effort was invested to develop long-lasting erosion mitigation measures. Water quality monitoring techniques, including a novel suspended sediment monitoring network, were used to compare remediated and control gullies, showing lower suspended sediment and nutrient concentrations in the remediated site. Long-term monitoring is necessary to validate the findings and demonstrate the potential of landscape-scale remediation as an effective mitigation action.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2021)