Article
Chemistry, Analytical
Haitao Han, Dawei Pan
Summary: Trace metals play a crucial role in regulating primary productivity and phytoplankton community composition in natural waters. Voltammetric methods, such as ASV and CLE-AdCSV, have been widely adopted for metal speciation analysis in various aquatic systems, with a focus on discriminating labile/inert fractions, redox species, and covalently bound species.
TRENDS IN ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Claudia Hitomi Watanabe, Erik Sartori Jeunon Gontijo, Murilo Teles Domingues, Renata Fracacio, Andre Henrique Rosa
Summary: This study aimed to evaluate the toxicity of Co(II) and As(III) to the water flea with the presence of humic substances (HS). The results showed that HS significantly reduced the toxicity of As(III) and Co(II). These findings suggest that the presence of HS should be taken into account when determining the safe limits for As and Co.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
D. Scott Smith, R. Nasir, Wayne Parker, A. Peters, G. Merrington, R. van Egmond, S. Lofts
Summary: The study compared WHAM predictions with measured ionic silver in diverse DOM, capturing the variability within model uncertainty. WHAM significantly underestimated silver binding in sewage samples, proposing a revised empirical model to account for sewage-specific binding sites. It is suggested that as sewage organic matter degrades, WHAM may better model the form.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Vincent Laderriere, Severine Le Faucheur, Claude Fortin
Summary: Biofilms play a key role in aquatic ecosystems and have great potential as biomonitors for exposure to contaminants. Metal accumulation in biofilms is higher at higher pH levels. Metal accumulation remains consistent between different regions and sampling periods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Multidisciplinary
Marzena Adamczyk, Malgorzata Grabarczyk, Weronika Leszko
Summary: This paper discusses a novel eco-friendly solid bismuth microelectrode for direct tungsten quantification. The microelectrode used in this study exhibits perfect long-term persistence and insensitivity to the presence of oxygen in the solution. The sensitivity of the sensor was optimized by investigating instrumental and chemical factors. The method shows good linearity and selectivity, and it has been successfully applied to the analysis of various samples.
Article
Environmental Sciences
Jun Wang, Xiaoxia Hao, Zile Liu, Zili Guo, Li Zhu, Bangjie Xiong, Dongmei Jiang, Linyuan Shen, Mingzhou Li, Bo Kang, Guoqing Tang, Lin Bai
Summary: The addition of biochar significantly increased methane yield and reduced the bioavailability of heavy metals during anaerobic digestion of pig manure. Although there was a slight increase in ecological risk, the digestates were still classified as moderate risk, providing important insights for treating heavy metal pollution in anaerobic digesters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yi-Pin Lin, I-Chia Li, Ping- Chou
Summary: This study investigated the dissolution of suspended PbS, CuS, and ZnS with varying levels of adsorbed NOM, revealing that NOM can either promote or inhibit the dissolution of metal sulfides, depending on the specific metal involved.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Analytical
Sasa Marcinek, Arnaud Chapoulie, Pascal Salaun, Scott Smith, Dario Omanovic
Summary: This study re-evaluated the applicability of Cu-ISE for measuring Cu-free in seawater, successfully addressing the challenge of measuring Cu-free under different total Cu concentrations through meta-calibration using the Gompertz function, providing a new method for the direct determination of free Cu ion concentration in seawater at levels relevant for coastal waters.
Article
Chemistry, Physical
Tinku, Anitadevi K. Prajapati, Sinjan Choudhary
Summary: Micelle-based drug delivery systems are widely used to solubilize and carry drugs to target cells, increasing drug bioavailability and reducing side effects. This study investigated the partitioning and delivery of polyamines in micelles, and their interactions with a carrier protein. The results provide insights into the mechanism of drug partitioning in micellar structures, aiding the design of effective drug delivery systems.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Melanie A. Trenfield, Samantha L. Walker, Claudia Tanneberger, Linda S. Kleinhenz, Andrew J. Harford
Summary: Copper is a potential contaminant of concern for a uranium mine in Kakadu National Park in northern Australia. The physicochemical characteristics of the freshwater in this region enhance copper's bioavailability and toxicity. Different species showed varying sensitivity to copper, highlighting the need for protective water quality guidelines specific to this area.
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2022)
Article
Environmental Sciences
Davide Vivado, Francisco Ardini, Annalisa Salis, Gianluca Damonte, Paola Rivaro
Summary: This study determined the concentration and speciation of dissolved iron in the Western Ross Sea region of the Southern Ocean. The results revealed the presence of iron-binding organic complexes with different stabilities. Principal component analysis showed differences in chemical, physical, and biological parameters between Terra Nova Bay and the neighboring glacier areas. Qualitative investigation identified siderophores as a heterogeneous class of organic ligands.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Marine & Freshwater Biology
Dean Oldham, Thomas Black, Theodora J. Stewart, Matteo Minghetti
Summary: The bioavailability and toxicity of metal complexes and free metal ions were investigated using a chemical equilibrium model, Visual Minteq, to design media with different metal species. The study found that the composition of the medium, as well as the metal's ability to complex with certain ions and anion exchange mechanisms, play a significant role in metal uptake and bioreactivity.
AQUATIC TOXICOLOGY
(2023)
Article
Chemistry, Multidisciplinary
George W. Luther, Katherine M. Mullaugh, Emily J. Hauser, Kevin J. Rader, Dominic M. Di Toro
Summary: The study discusses the dissolved chemical speciation of metals in natural waters and methods to investigate metal organic ligand complexes. Competitive ligand exchange-cathodic stripping voltammetry titrations and pseudovoltammetry provide information about metal-ligand complexes. Kinetic experiments combined with the addition of competitive ligands offer insights into the dissociation rate constant and conditional equilibrium constant of the unknown metal-ligand complexes.
Article
Chemistry, Physical
Anton Lopez-Frances, Francisco Bernat-Quesada, Maria Cabrero-Antonino, Belen Ferrer, Amarajothi Dhakshinammorthy, Herme G. Baldovi, Sergio Navalon
Summary: Research has shown that nanographite exhibits superior activity, durability, and recyclability as a metal-free ozonation catalyst in aqueous media. The exceptional performance of nanographite is attributed to its high surface area and defective nanosized graphitic structures. Moreover, nanographite also demonstrates excellent catalytic efficiency when using natural surface river water or seawater.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Environmental Sciences
Hiroyuki Mano, Naohide Shinohara, Adam Peters, Emily Garman, Ellie Middleton, Chris Schlekat, Wataru Naito
Summary: This study evaluated the accuracy and bias of existing nickel bioavailability models in predicting chronic toxicity in Japanese river waters. The results showed that water chemistry differences among Japanese river waters influenced the chronic toxicity of nickel, and calibrating the models in Japanese natural waters increased their predictive capacity by up to approximately five times.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Badreddine Barhoumi, Sylvia G. Sander, Mohamed Ridha Driss, Imma Tolosa
Summary: This study examined the presence and levels of 21 PFAS in marine species collected from Bizerte lagoon, Northern Tunisia, revealing the occurrence of PFAS in seafood from North Africa at low levels. The profiles of PFAS varied significantly among different species, and current exposure to PFAS through seafood consumption does not pose a significant concern for local consumers.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Charlotte Kleint, Rebecca Zitoun, Rene Neuholz, Maren Walter, Bernhard Schnetger, Lukas Klose, Stephen M. Chiswell, Rob Middag, Patrick Laan, Sylvia G. Sander, Andrea Koschinsky
Summary: Hydrothermal vents are an important source of trace metals in the oceans. This study focuses on the trace metal dynamics in hydrothermal plumes at volcanic arcs, specifically two submarine volcanoes along the Kermadec arc in the Southwest Pacific Ocean. The results show strong plumes of dissolved trace metals, with certain element/Fe ratios increasing, suggesting higher solubility and/or stronger stabilization of these elements. The transport of trace metals is found to be controlled by sulfide nanoparticles and iron oxyhydroxides at different sites.
FRONTIERS IN MARINE SCIENCE
(2022)
Review
Environmental Sciences
Badreddine Barhoumi, Sylvia G. Sander, Imma Tolosa
Summary: Plastic, paper, and cardboard are commonly used as food contact materials, but they often contain hazardous substances like PFASs, posing potential risks to human health. There is growing concern about the environmental harm caused by FCMs, including plastic accumulation, microplastics, nanoplastics, and PFAS release. Further research is needed to understand the presence and sorption mechanisms of PFASs in FCMs and MPs for predicting associated risks.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Andrija Vinkovic, Gennadiy Laptyev, Gunseli Yaprak, Krasimira Slavova, Danijela Joksimovic, Tamara Troskot-Corbic, Marina Frontasyeva, Octavian G. Duliu, Elida Bylyku, Manjola Shyti, Famil Humbatov, Mirza Nuhanovic, Narcisa Smjecanin, Tzvetana Nonova, Lyuben Dobrev, Ioannis Pashalidis, George Melikadze, Alexandra Ioannidou, Christos Tsabaris, Almira Aidarkhanova, Daniela David, Inga Zinicovscaia, Alexander Kamnev, Milena Horvat, Marijan Necemer, Radojko Jacimovic, Haluk Yucel, Yakup Kalayci, Abdullah Dirican, Ilker Sert, Marina Plotsen, Kyrylo Korychenskyi, Sam Matar Adam Khatir, Sylvia G. Sander, Katherina Deufrains, Hana Fajkovic, Tin Klanjscek, Neda Vdovic, Tarzan Legovic, Jasmina Obhodas
Summary: This study provides insights into the recent responses of sediments to climate change and their ability to sequester atmospheric carbon. The results show that the accumulation rates of organic and inorganic carbon in sediments have increased over time, mainly due to the increase in atmospheric carbon dioxide. Additionally, CO2 fertilization and increasing sea temperatures have also influenced the accumulation of carbon in sediments.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Environmental Sciences
Vanessa Hatje, Manmohan Sarin, Sylvia G. Sander, Dario Omanovic, Purvaja Ramachandran, Christoph Voelker, Ricardo O. Barra, Alessandro Tagliabue
Summary: The interaction between climate change and contaminants has a significant impact on the sensitivity of organisms to contamination and impaired ecosystem function. Understanding the complexities of this interaction is crucial for predicting future changes in contaminant cycling and their effects on human health and marine ecosystems.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Oceanography
Stephen M. Chiswell, Philip W. Boyd, Sylvia G. Sander, Michael J. Ellwood, Angela Milne
Summary: Subtropical and subantarctic waters on both sides of the southern hemisphere Subtropical Front are iron-limited. A study conducted in the subtropical waters east of New Zealand found a significant positive correlation between chlorophyll and dissolved iron. A simple model suggests that iron entrainment from high-iron coastal water into low-iron offshore Subtropical Water supports primary production. Therefore, mesoscale eddy-induced lateral advection of iron may play a significant role in the total primary production within the Subtropical Front.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Microbiology
Stilianos Louca, Gordon T. Taylor, Yrene M. Astor, Kristen N. Buck, Frank E. Muller-Karger
Summary: When population dynamics and reaction kinetics operate at much shorter time scales than physical mixing processes, the need for unknown population dynamical, physiological and reaction-kinetic parameters and uncertainties in species composition can be eliminated. In this 'fast-reaction-transport' (FRT) limit, accurate predictions can be made based on chemical boundary conditions, physical mixing processes and reaction stoichiometries without knowledge of species composition, physiology or population/reaction kinetic parameters. Our findings suggest that microbial processes in poorly mixed water columns and sediments are largely transport limited and thus predictable regardless of species composition, population dynamics and kinetics.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Limnology
Shannon M. M. Burns, Randelle M. M. Bundy, William Abbott, Zuzanna Abdala, Alexa R. R. Sterling, P. Dreux Chappell, Bethany D. D. Jenkins, Kristen N. N. Buck
Summary: This study examined the relationship between phytoplankton growth and dissolved concentrations of iron, manganese, cobalt, nickel, copper, zinc, and cadmium in the Southern Ocean. The results showed that manganese was a secondary limiting nutrient both onshore and offshore, and there was no co-limitation of iron and vitamin B-12. The uptake of metals relative to soluble reactive phosphorus was closely related to initial dissolved metal to phosphorus ratio.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Multidisciplinary Sciences
Christian T. Hansen, Charlotte Kleint, Stefanie Boehnke, Lukas Klose, Nicole Adam-Beyer, Katharina Sass, Rebecca Zitoun, Sylvia G. Sander, Daniela Indenbirken, Thorsten Dittmar, Andrea Koschinsky, Mirjam Perner
Summary: Iron is an essential trace element for life, but it can be scarce or excessive in the ocean, leading to microbial stress. Experiments showed that some hydrothermal plume microbes have the ability to thrive even at high concentrations of iron. These ligand-producing microbes may play a key role in keeping iron in solution and detoxification.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Alexa R. Sterling, Laura Z. Holland, Randelle M. Bundy, Shannon M. Burns, Kristen N. Buck, P. Dreux Chappell, Bethany D. Jenkins
Summary: The growth of diatoms in the Southern Ocean is often limited by low concentrations of dissolved iron and other trace metals. Diatoms and co-occurring bacteria may overcome this challenge through mutualistic relationships, in which diatoms provide organic carbon for bacterial growth, and bacteria supply diatoms with metals and other secondary compounds. This study examines the interactions between diatoms and bacteria and how they are influenced by gradients of micronutrients and metals in the West Antarctic Peninsula.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Tim Young, Samantha L. Gale, Norman L. C. Ragg, Sylvia G. Sander, David J. Burritt, Billy Benedict, Dung V. Le, Silas G. Villas-Boas, Andrea C. Alfaro
Summary: Developing new tools to assess the health of cultivated shellfish larvae is crucial for the aquaculture industry. In a large-scale trial, mussel embryos were exposed to copper in the presence of EDTA, and metabolomics analysis was used to identify potential biomarkers for monitoring and characterize the mechanisms of metal toxicity. The results showed that low levels of bioavailable copper caused coordinated fluctuations in metabolite profiles, while lethal levels of copper induced severe metabolic dysregulation and cell/organism death.
Article
Environmental Sciences
Laura E. Sofen, Olga A. Antipova, Kristen N. Buck, Salvatore Caprara, Lauren Chacho, Rodney J. Johnson, Gabriella Kim, Peter Morton, Daniel C. Ohnemus, Sara Rauschenberg, Peter N. Sedwick, Alessandro Tagliabue, Benjamin S. Twining
Summary: Particulate phases play a major role in transporting trace metals in the ocean. These phases can be categorized into lithogenic, biogenic, or authigenic based on their origin. Accurate characterization of these phases is crucial as they have distinct functions in the biogeochemical iron cycle.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Ecology
Garrett Sharpe, Liang Zhao, Meredith G. Meyer, Weida Gong, Shannon M. Burns, Allesandro Tagliabue, Kristen N. Buck, Alyson E. Santoro, Jason R. Graff, Adrian Marchetti, Scott Gifford
Summary: Synechococcus, the most abundant cyanobacteria in high latitude regions, plays a significant role in annual marine net primary productivity. However, the uneven sampling of Synechococcus populations across the ocean, particularly in high-latitude, High Nutrient Low Chlorophyll (HNLC) regions, has limited our understanding of their adaptations to iron limitation and their influence on carbon, nitrogen, and iron cycles. This study focuses on Synechococcus populations in the subarctic North Pacific, a well-characterized HNLC region, and reveals their dependence on ammonium and other forms of recycled nitrogen, leading to reduced iron requirements. The findings have important implications for modeling the contribution of cyanobacteria to primary production and carbon export.
ISME COMMUNICATIONS
(2023)
Article
Environmental Sciences
Mark A. Brzezinski, Diana E. Varela, Bethany D. Jenkins, Kristen N. Buck, Sile M. Kafrissen, Janice L. Jones
Summary: Diatoms play an essential role in marine primary productivity and carbon export. However, their contributions are modified in high-nutrient low-chlorophyll regions due to decoupling of silicon and carbon cycling caused by low iron levels. The study at Ocean Station Papa (OSP) in the northeastern subarctic Pacific found that diatoms were limited by iron and silicic acid concentration in their growth and silicon uptake. Despite high silicic acid concentrations, biogenic silica concentrations were low. Diatoms contributed more to carbon export than primary productivity at this location.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Environmental Sciences
Deonie Allen, Steve Allen, Sajjad Abbasi, Alex Baker, Melanie Bergmann, Janice Brahney, Tim Butler, Robert A. Duce, Sabine Eckhardt, Nikolaos Evangeliou, Tim Jickells, Maria Kanakidou, Peter Kershaw, Paolo Laj, Joseph Levermore, Daoji Li, Peter Liss, Kai Liu, Natalie Mahowald, Pere Masque, Dusan Materic, Andrew G. Mayes, Paul McGinnity, Iolanda Osvath, Kimberly A. Prather, Joseph M. Prospero, Laura E. Revell, Sylvia G. Sander, Won Joon Shim, Jonathan Slade, Ariel Stein, Oksana Tarasova, Stephanie Wright
Summary: The study analyzes the processes and fluxes of the marine-atmospheric micro(nano)plastic cycle and highlights the limited observations. A global observation strategy for marine-atmospheric micro(nano)plastics is proposed to address the uncertainties and knowledge gaps.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)