Review
Chemistry, Multidisciplinary
Josep Galceran, Yue Gao, Jaume Puy, Martine Leermakers, Carlos Rey-Castro, Chunyang Zhou, Willy Baeyens
Summary: The paper reviews the use of Diffusive Gradients in Thin-films (DGT) technique for assessing free ions and labile metal complexes in aquatic systems. It discusses the principles and applications of this technique in determining the speciation of different species of elements, including their labile concentrations, mobilities, and labilities. DGT has been successfully applied in determining the organic pool of trace metals in freshwaters and characterizing organic and inorganic complexes in seawaters.
FRONTIERS IN CHEMISTRY
(2021)
Review
Environmental Sciences
Dong-Xing Guan, Si-Xue He, Gang Li, H. Henry Teng, Lena Q. Ma
Summary: The Diffusive Gradients in Thin-films technique (DGT) has gained increasing popularity in soil research since 1998, attracting attention due to its ease of use and versatility in applications. It is effective in studying the behaviors of nutrients, trace elements, and polar organic compounds in soils, making it a valuable tool for various aspects of soil research.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Bin Yang, Hui Lin, Sarah L. Bartlett, Erin M. Houghton, Dale M. Robertson, Laodong Guo
Summary: Phosphorus loadings to the Great Lakes have been regulated for decades, but recent reports show re-eutrophication and seasonal hypoxia are increasing. Understanding the fate and cycling of different P species along the river-lake continuum is crucial. Results from the Fox River-Green Bay system reveal dynamic changes in P speciation and sources along the aquatic continuum.
Article
Engineering, Environmental
Lei Gao, Rui Li, Zuobing Liang, Qirui Wu, Lei Hou, Jianyao Chen, Ping Zhao
Summary: Investigation of the speciation and remobilization mechanisms of chromium (Cr) in sediment is essential for accurate estimation of its ecological risks in aquatic systems. In this study, a three-step chemical extraction procedure and diffusive gradient in thin films (DGT) technique were used to investigate the geochemical speciation, mobility potentials, and release characteristics of sediment Cr. The study found that the geochemical speciation of sediment Cr is influenced by organic matter and manganese oxides, and the labile forms of Cr also vary with seasonal changes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Mathematics, Applied
Mario Fuest
Summary: In the first part of this paper, we establish the convergence properties of certain functions in different function spaces, and use these results to derive solutions to initial boundary value problems and obtain global generalized solutions to cross-diffusive systems. These findings expand on previous research and do not require symmetry assumptions or smallness of certain parameters.
JOURNAL OF EVOLUTION EQUATIONS
(2023)
Article
Oceanography
Monika Lengier, Beata Szymczycha, Aleksandra Brodecka-Goluch, Zaneta Klostowska, Karol Kulinski
Summary: This study investigated the potential release of dissolved inorganic carbon, dissolved organic carbon, ammonium, and phosphates from Baltic Sea sediments. Results showed a high spatial variability in the release of these substances in the Baltic Sea, influenced by oxygen concentrations in the water column and inflows.
Article
Computer Science, Information Systems
Naveed Khan, Sally McClean, Shuai Zhang, Chris Nugent
Summary: The monitoring of human activities using body worn sensors is a vital area of research in machine learning. These sensors capture a large amount of data in an unobtrusive manner. Change point detection can be used to classify different user activities. The use of cloud and edge computing platforms can enhance the efficiency of the change detection process.
JOURNAL OF CLOUD COMPUTING-ADVANCES SYSTEMS AND APPLICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Hendryk Gemeiner, Amauri Antonio Menegario, Carlos Eduardo Eismann, Lucas Pellegrini Elias, Jorge Henrique Pedrobom, Thiago de Araujo Dourado, Hung Kiang Chang, Fabiano Tomazini da Conceicao, Rodrigo Braga Moruzzi
Summary: This study aimed to assess the size and lability of Cu and Zn bound to proteins in the cytosol of fish liver using solid-phase extraction (SPE), diffusive gradients in thin films (DGT), and ultrafiltration (UF). The concentration of Cu and Zn in the cytosol was determined by ICP-MS. The results showed that a significant proportion of Cu and Zn in the cytosol were associated with high-molecular-weight proteins. The DGT technique provided a more accurate estimation of the labile pool of Cu and Zn compared to previous literature data.
Review
Environmental Sciences
Rayssa Lima dos Santos, Jozelia Maria de Sousa Correia, Ednilza Maranhao dos Santos
Summary: This study compiled information on the use of freshwater turtles and crocodilians as environmental biomonitors of inorganic element contamination. The research found an overall increase in studies involving these species, with a variety of species and elements evaluated. Mainly utilizing atomic absorption spectroscopy for analysis, non-destructive matrices, and validation methods were used to ensure accuracy. The findings suggest that the use of aquatic reptiles in environmental monitoring research aids in public policy decision-making and management plans.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Engineering, Electrical & Electronic
Rasheed Majeed Jorani, Maroua Haddar, Fakher Chaari, Mohamed Haddar
Summary: This paper proposes a new methodology for gear crack detection using time-domain analysis, frequency-domain analysis, and statistical process control charts (SPCC). The gear mesh stiffness effect and Gaussian white noise are utilized to simulate real-world conditions and calculate fault-sensitive features. The results show that the EWMA chart outperforms other methods in detecting cracks at an early stage.
Article
Energy & Fuels
Iram Mushtaq, Imran Siddique, Sayed M. Eldin, Jihen Majdoubi, Shahid Hussain Gurmani, Mahvish Samar, Rana Muhammad Zulqarnain
Summary: The capability to store and manage energy consumption is crucial for harnessing large amounts of renewable energy in the future. There are various techniques for energy storage, including mechanical, electrical, chemical, electrochemical, and thermal methods. This research focuses on proposing a decision-making model using Einstein-ordered weighted aggregation operators for q-rung orthopair fuzzy hypersoft sets (q-ROFHSSs) to achieve dynamic multi-criteria group decision-making and select thermal energy storage technologies.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Daniel R. McKeating, Vicki L. Clifton, Cameron P. Hurst, Joshua J. Fisher, William W. Bennett, Anthony Perkins
Summary: A study using elemental metabolomics was conducted to predict adverse outcomes in pregnancy, including small for gestational age, low placental weight, and preterm birth. It found that certain elements, such as selenium, zinc, and iodine, were associated with these outcomes. Utilizing random forest algorithms, the study showed high accuracy in predicting these adverse outcomes, indicating the potential for early detection and intervention strategies in at-risk pregnancies.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Limnology
Jian-Jhih Chen, Dirk V. Erler, Naomi S. Wells, Jianyin Huang, David T. Welsh, Bradley D. Eyre
Summary: Estuaries function as key modulators of nitrogen flow to marine ecosystems, with the dominant pathway for N-2 production being coupled nitrification-denitrification, especially in vegetated habitats. Macroalgae habitats play a significant role in N removal and retention, contributing to a large portion of N-2 production and DNRA despite their smaller surface area compared to other habitats. The presence of seagrass and macroalgae is strongly correlated with N-2 production, indicating a potential decrease in the capacity of estuaries to mitigate reactive N loads with the loss of these vegetated habitats.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Engineering, Environmental
Gujie Qian, Rong Fan, Jianyin Huang, Allan Pring, Sarah L. Harmer, He Zhang, Maria Angelica D. Rea, Joel Brugger, Peter R. Teasdale, Christopher T. Gibson, Russell C. Schumann, Roger St C. Smart, Andrea R. Gerson
Summary: The study found that chalcopyrite is the most effective in limiting pyrite oxidation and acid generation in sulfidic waste rocks, while sphalerite has the least impact. Galena had a smaller impact compared to chalcopyrite on pyrite oxidation, but experienced greater oxidation over time.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
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)