Article
Engineering, Environmental
Pengjie Hu, Yu Zhang, Jiajia Wang, Yanpei Du, Zimeng Wang, Qinghai Guo, Zezhen Pan, Xingmao Ma, Britta Planer-Friedrich, Yongming Luo, Longhua Wu
Summary: The formation of colloid- and nanoparticle-bound As is an important geochemical process that can affect the mobility and bioavailability of arsenic (As) in paddy environments. This study focused on the distribution and composition of particle-bound As in paddy soils under changing redox conditions. The results showed that organic matter-stabilized colloidal Fe, most likely in the form of (oxy)hydroxide-clay composite, is the main carrier of As. Soil reduction released As from the colloidal fractions, while reoxidation caused their rapid sedimentation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Yue Shen, Haodan Yu, Jiahui Lin, Ting Guo, Zhongmin Dai, Caixian Tang, Jianming Xu
Summary: This study found that tetracycline addition significantly promoted the reduction and release of arsenic in flooded soils, mainly by increasing the concentration of dissolved organic carbon and lowering soil redox potential. Additionally, tetracycline also increased the relative abundances of As-reducing genes and resistant bacteria, playing a key role in stimulating As reduction.
ENVIRONMENTAL POLLUTION
(2022)
Review
Biochemistry & Molecular Biology
Ursula Abou-Rjeileh, G. Andres Contreras
Summary: Lipid mobilization in adipose tissues, involving lipogenesis and lipolysis, plays a crucial role in regulating systemic energy metabolism. Reactive oxygen and nitrogen species (ROS and RNS) produced during lipolysis require a robust antioxidant response to maintain redox signaling. This review explores the production of ROS and RNS in adipose tissue, their regulation of lipid mobilization, and the impact of antioxidants.
Article
Chemistry, Analytical
Sarib Jadoon, Michael Schindler
Summary: This study reveals the speciation and transport of copper in soils impacted by smelters and coal power plants, as well as the role of organic matter colloids in sequestering copper.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Soil Science
Laurel K. ThomasArrigo, Ruben Kretzschmar
Summary: Soils in Iceland have abundant SRO iron minerals and aluminosilicates. Microbial reduction of iron and increased soil solution pH occur under anoxic conditions. Soils with SRO iron minerals undergo more extensive iron reduction. Colloids persist during re-oxidation and new iron mineral phases are formed.
Article
Environmental Sciences
Martha Cristina Bustos-Lopez, D. Crispin-Rodriguez, Maria P. Martinez-Polanco, R. Cante-Rios
Summary: This study aims to assess the transport and fate of azithromycin in the biosphere by analyzing its adsorption process in different soil types. The results show that the Langmuir model is a better fit for clay soils, while the Freundlich model is suitable for soils with higher sand content. The adsorption of azithromycin is mainly influenced by the inorganic fraction of the soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Oceanography
Liqin Duan, Jinming Song, Xuegang Li, Huamao Yuan
Summary: This study evaluates the migration and removal of redox sensitive elements (RSEs) at the sediment-water interface (SWI) off the Changjiang Estuary by examining the porewater and solid RSEs. The concentrations of porewater and solid RSEs decrease with depth, and the removal of Mo is mediated by Fe-S phase while the removal of U is microbial-mediated reduction. The peaks of dissolved nitrate, Fe2+ and acid volatile sulfur (AVS) correspond to the downward removal of V, U and Mo, and the upward shift of RSE peaks in porewater reflects the occurrence of hypoxia in summer.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Multidisciplinary Sciences
Beth Kelly, Gustavo E. Carrizo, Joy Edwards-Hicks, David E. Sanin, Michal A. Stanczak, Chantal Priesnitz, Lea J. Flachsmann, Jonathan D. Curtis, Gerhard Mittler, Yaarub Musa, Thomas Becker, Joerg M. Buescher, Erika L. Pearce
Summary: The behavior of Dictyostelium discoideum is dependent on nutrients, existing as unicellular organisms in the presence of sufficient food and aggregating into multicellular organisms upon starvation. The generation of reactive oxygen species due to nutrient limitation leads to the sequestration of cysteine in the antioxidant glutathione, limiting its sulfur atom usage and maintaining the organism in a nonproliferating state conducive to multicellular development. This mechanism of signaling through reactive oxygen species highlights the roles of oxygen and sulfur as simple signaling molecules in dictating cell fate in early eukaryotes, with implications for responses to nutrient fluctuations in multicellular eukaryotes.
Review
Green & Sustainable Science & Technology
Shan Zhao, Baoju Zhang, Wenbing Zhang, Xinjia Su, Botao Sun, Mahdi Kioumarsi
Summary: The geotechnical characteristics of soils within contaminated sites are susceptible to deterioration, particularly due to the corrosion of concrete. However, the precise influence of contaminants from different sources on soil properties is not yet fully understood, highlighting the need for further research. This review aims to elucidate the underlying mechanisms of various impacts, emphasizing the importance of mitigating potential hazards and safeguarding the environment.
Article
Engineering, Environmental
Xudong Jing, Qian Li, Xianliang Qiao, Jingwen Chen, Xiyun Cai
Summary: The practice of outspread straw return leads to accumulation of structurally diverse organic materials in soils, affecting the sorption of pesticides and antibiotics. The changing chemical structure and properties of accumulated straw materials during decomposition result in a compromise in sorption capacity, leading to specific sorption trends of organic compounds. Relatively hydrophobic chemicals may exhibit decreasing sorption capacity in organic matter-rich soils with straw return practice, contradicting the common belief that crop straw return increases sorption and decreases leaching.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Mahalakshmi Mathivanan, Chidambaram Sabarathinam, Prasanna Mohan Viswanathan, Venkatramanan Senapathi, Devaraj Nadesan, Gunarani Gunaseelan Indrani, Gnanasekar Malaimegu, Sahoo Sunil Kumar
Summary: The study revealed high uranium concentrations in groundwater in the semiarid regions of southern India, especially during the post monsoon season. Uranium primarily existed in the form of U3O8 and was associated with high pH values. Redox conditions were identified as the main process facilitating the release mechanism of uranium.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Sabry M. Shaheen, Jianxu Wang, Karen Baumann, Shan-Li Wang, Peter Leinweber, Joerg Rinklebe
Summary: This study investigated phosphorus mobilization under different redox conditions in redoximorphic arable soils along a slight slope in Northern Germany. It was found that phosphorus mobilization was higher under low redox potential and pH conditions, possibly due to the release of phosphorus via the reductive dissolution of Fe-(oxhydr)oxides and soil organic matter mineralization.
Article
Engineering, Mechanical
Fanli Liu, Moran Wang
Summary: The study found that for fixed wettability, the critical pressure for mobilizing trapped ganglia usually peaks at neutrally wet conditions, and the movement of ganglia during the displacement process favors water-wet conditions. Moreover, altering wettability from oil-wet to water-wet requires a dynamic process with heterogeneous wetting states and the ability for ganglia to merge within a time window for further displacement.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Editorial Material
Environmental Sciences
Chen-Jing Liu, Song-Ge Deng, Chun-Yan Hu, Peng Gao, Eakalak Khan, Chang-Ping Yu, Lena Q. Ma
Summary: Bioremediation and phytoremediation are cost-effective and environmentally friendly techniques used for remediation of contaminated sites. 24 articles in Critical Reviews in Environmental Science and Technology (CREST) from 2018 to 2022 focus on the application of these techniques. Bioremediation employs microorganisms to degrade contaminants, while phytoremediation uses plants to remove and change contaminants. However, these techniques have limitations such as lengthy remediation periods, environmental sensitivity, and nutrient deficiency. Improvement strategies including immobilization of microorganisms, construction of microbial consortia, and use of amendments have been employed to overcome these limitations.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Hai-long Lu, Ke-wei Li, Nkoh Nkoh Jackson, Xian He, Ren-kou Xu, Wei Qian, Ren-yong Shi, Zhi-neng Hong, Jackson Nkoh Nkoh
Summary: Incubation experiments were conducted to investigate pH variation in paddy soils during submerging/draining alternation and its relationship with Cd speciation. The results showed that soil CEC is a key factor affecting pHBC of paddy soils. Reduction of Fe(III) oxides plays a leading role in increasing soil pH. The variation in soil pH was responsible for the transformation of Cd speciation. Soil pHBC was negatively correlated with the change rate of available Cd and the percentage of acid extractable Cd concentration.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Environmental Sciences
N. Kao, M. Mohamed, R. J. Sorichetti, A. Niederkorn, P. Van Cappellen, C. T. Parsons
Summary: Fanshawe Reservoir on the Thames River is not only an important sink for phosphorus (P) in the Lake Erie watershed, but also modulates the timing and speciation of P loads. It functions as a net sink for P annually, but oscillates between a source and sink seasonally. The reservoir has significant influence on the distribution and forms of P in the river, highlighting the potential to attenuate downstream P loads.
JOURNAL OF GREAT LAKES RESEARCH
(2022)
Article
Limnology
Kateri R. Salk, Jason J. Venkiteswaran, Raoul-Marie Couture, Scott N. Higgins, Michael J. Paterson, Sherry L. Schiff
Summary: Research suggests that successful lake management efforts should take into account the effects of climate change on phytoplankton blooms, not just nutrient reductions.
LIMNOLOGY AND OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Tamara L. Van Staden, Kim J. Van Meter, Nandita B. Basu, Chris T. Parsons, Zahra Akbarzadeh, Philippe Van Cappellen
Summary: Management strategies to reduce nutrient enrichment of surface waters may face challenges due to accumulated nutrient legacies in the landscape. A study in Ontario, Canada applied the Net Anthropogenic Phosphorus Input (NAPI) model to reconstruct historical phosphorus input and found that despite a general downward trend, Lake Erie continues to suffer from algal blooms. Comparison with river monitoring data revealed that only 12.5% of the phosphorus discharged by Canadian rivers into Lake Erie came from agricultural areas, indicating that over 85% of agricultural phosphorus is retained in watersheds, contributing to a long-term risk for lake recovery. To mitigate this risk, the study proposes a methodology to identify source areas with the highest potential of exporting legacy soil phosphorus to surface waters for prioritized soil conservation efforts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Andrew J. Wade, Richard A. Skeffington, Raoul-Marie Couture, Martin Erlandsson Lampa, Simon Groot, Sarah J. Halliday, Valesca Harezlak, Josef Hejzlar, Leah A. Jackson-Blake, Ahti Lepisto, Eva Papastergiadou, Joan Lluis Riera, Katri Rankinen, Maria Shahgedanova, Dennis Trolle, Paul G. Whitehead, Demetris Psaltopoulos, Dimitris Skuras
Summary: Recent studies show that climate change may exacerbate nitrogen and phosphorus loss from farms and farmland, leading to worsened freshwater eutrophication. This study investigates the relative importance of climate and land use drivers in nine study catchments in Europe and Turkey. The findings suggest that land use changes have a larger impact on nutrient concentrations and loads compared to climate change alone. However, in Beysehir Lake in Turkey, climate change poses a greater threat to the freshwater ecosystem than nutrient usage. Further research is needed to accurately simulate extreme flow and water quality and understand the response of aquatic ecosystems to reductions in N and P.
Review
Ecology
Jasmine E. Saros, Christopher D. Arp, Frederic Bouchard, Jerome Comte, Raoul-Marie Couture, Joshua F. Dean, Melissa Lafreniere, Sally MacIntyre, Suzanne McGowan, Milla Rautio, Clay Prater, Suzanne E. Tank, Michelle Walvoord, Kimberly P. Wickland, Dermot Antoniades, Paola Ayala-Borda, Joao Canario, Travis W. Drake, Diogo Folhas, Vaclava Hazukova, Henriikka Kivila, Yohanna Klanten, Scott Lamoureux, Isabelle Laurion, Rachel M. Pilla, Jorien E. Vonk, Scott Zolkos, Warwick F. Vincent
Summary: This article reviews the understanding of key sentinel responses to climate change in Arctic freshwater systems and provides suggestions for future research. Tracking these responses in Arctic freshwater systems can enhance our understanding of climate-driven ecosystem changes, provide early indicators of broader changes, and improve the protection of freshwater biodiversity and resources.
Article
Environmental Sciences
Giles Exley, Trevor Page, Stephen J. Thackeray, Andrew M. Folkard, Raoul-Marie Couture, Rebecca R. Hernandez, Alexander E. Cagle, Kateri R. Salk, Lucie Clous, Peet Whittaker, Michael Chipps, Alona Armstrong
Summary: Floating solar photovoltaic (FPV) deployments are increasing globally, but their impacts on phytoplankton are poorly understood. This study used a simulation approach to investigate the effects of FPV coverage and array siting location on a UK reservoir and found that FPV coverage significantly impacted thermal properties and phytoplankton biomass and species composition. Deploying FPV arrays in faster flowing areas can achieve similar reductions in phytoplankton biomass.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Civil
Sofia La Fuente, Eleanor Jennings, Gideon Gal, Georgiy Kirillin, Tom Shatwell, Robert Ladwig, Tadhg Moore, Raoul-Marie Couture, Marianne Cote, C. Love Raman Vinna, R. Iestyn Woolway
Summary: Lake evaporation is important for the water budget of lakes. Predicting its response to climate change is crucial for mitigation and adaption strategies. This study presents a multi-model analysis to understand evaporation responses to climate change.
JOURNAL OF HYDROLOGY
(2022)
Review
Materials Science, Multidisciplinary
Laurent Charlet, Christophe Tournassat, Jean-Marc Greneche, Paul Wersin, Antoine Gehin, Jebril Hadi
Summary: Rates and mechanisms of important reactions in the cycling of electrons via the geochemical transformations of iron have been identified using Mossbauer spectrometry. The cycling of iron through various reservoirs depends on high surface-area-to-volume ratios of Fe-bearing solids. Fe-bearing solids surfaces can interact chemically with reductants and oxidants, facilitating electron transfer as well as dissolution and precipitation.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Engineering, Environmental
Nolan J. T. Pearce, Chris T. Parsons, Sarah M. Pomfret, Adam G. Yates
Summary: Effective modeling and management of phosphorus (P) losses from landscapes to waterbodies requires understanding of P retention and remobilization along the terrestrial-aquatic continuum. Stream periphyton has the capability to transiently store bioavailable P, but its response to dynamic P concentrations is largely unknown.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Soil Science
Linden Fairbairn, Fereidoun Rezanezhad, Mehdi Gharasoo, Chris T. Parsons, Merrin L. Macrae, Stephanie Slowinski, Philippe Van Cappellen
Summary: Soil moisture is an important variable in predicting carbon dioxide (CO2) emissions. Previous studies have focused on aerobic respiration as the source of CO2, ignoring anaerobic processes. This study conducted experiments at different moisture levels under both oxic and anoxic conditions. The results showed that moderate moisture levels resulted in maximum CO2 fluxes, but substantial CO2 fluxes were also measured at fully saturated conditions. Methane (CH4) fluxes increased over time in anoxic conditions. A kinetic model was proposed to represent both aerobic and anaerobic CO2 production. This study highlights the importance of considering anaerobic reaction pathways in predicting soil CO2 production at high moisture levels.
Article
Materials Science, Multidisciplinary
Sudipta Chakraborty, Dipanjan Banerjee, Andreas C. Scheinost, Jean-Marc Greneche, Fabienne Favre, Antoine Gehin, Laurent Charlet
Summary: The reactivity of Fe(II) sorbed on different types of clay towards U(VI) reduction was investigated. U(VI) reduction only occurred on Fe-free synthetic montmorillonite (MONT), and a hydrated uranyl silicate (soddyite)-like phase was formed. The lack of reactivity on Fe-poor natural montmorillonite (Fe-MONT) and Fe-rich natural nontronite (NAu-2) is likely due to inter-valence charge transfer (IVCT) between surface Fe(II) and structural Fe(III). This study highlights the dependence of clay sorbed Fe2+ reactivity on the nature of clay and the oxidation state of sorbed Fe.
JOURNAL OF MATERIALS RESEARCH
(2023)
Article
Geochemistry & Geophysics
Maxime Courchesne, Raoul-Marie Couture, Justine Basque, Nicolas Reynier, Dominic Lariviere
Summary: The solubilization of valuable elements such as uranium, mercury, and cesium from cemented radioactive waste (CRW) has been investigated using H2SO4/KI. However, separation of these elements is necessary for their recycling. This study examined the extraction of uranium and mercury from surrogate cemented radioactive waste (SCRW) using chelating resin Lewatit TP260 in the presence of iodide. The Lewatit TP260 demonstrated high affinity for uranium, but the presence of iodide increased competition between adsorbed mercury and iodide-mercury complexes. The reusability of the resin was also tested and it was found that the capacity for uranium and mercury extraction decreased with the number of cycles due to the presence of trivalent cation.
Article
Environmental Sciences
Evgenia-Maria Papaslioti, Philippe Le Bouteiller, Hugo Carreira, Jean -Marc Greneche, Alejandro Fernandez-Martinez, Laurent Charlet
Summary: Magnetite can effectively remove contaminants from wastewater, especially arsenic, antimony, and uranium present in the acidic phospho-gypsum leachates derived from the phosphate fertilizer industry. However, the presence of phosphate limits the removal of antimony and arsenic by magnetite. Therefore, a three-step design involving oxidation, precipitation, and reaction with magnetite can achieve high contaminant uptake in field applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Stephanie Slowinski, Jovana Radosavljevic, Alyssa Graham, Isabella Ippolito, Kathryn Thomas, Fereidoun Rezanezhad, Mahyar Shafii, Chris T. Parsons, Nandita B. Basu, Johan Wiklund, Roland I. Hall, Philippe Van Cappellen
Summary: This study reconstructed changes in phosphorus loading and cycling in Lake Wilcox, Ontario, Canada, using sediment core and water quality data. The lake experienced eutrophication due to increased phosphorus loading from agricultural intensification and urbanization. However, improved soil conservation and urban stormwater management have reduced phosphorus loading to levels comparable to the early 1900s. The lake's eutrophication-like symptoms, particularly hypoxia in the hypolimnion, are now driven by salinization caused by increased use of deicing agents in the expanding urban area.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Martine Lizotte, Bennet Juhls, Atsushi Matsuoka, Philippe Massicotte, Gaelle Mevel, David Obie James Anikina, Sofia Antonova, Guislain Becu, Marine Beguin, Simon Belanger, Thomas Bosse-Demers, Lisa Broeder, Flavienne Bruyant, Gwenaelle Chaillou, Jerome Comte, Raoul-Marie Couture, Emmanuel Devred, Gabriele Deslongchamps, Thibaud Dezutter, Miles Dillon, David Doxaran, Aude Flamand, Frank Fell, Joannie Ferland, Marie-Helene Forget, Michael Fritz, Thomas J. Gordon, Caroline Guilmette, Andrea Hilborn, Rachel Hussherr, Charlotte Irish, Fabien Joux, Lauren Kipp, Audrey Laberge-Carignan, Hugues Lantuit, Edouard Leymarie, Antonio Mannino, Juliette Maury, Paul Overduin, Laurent Oziel, Colin Stedmon, Crystal Thomas, Lucas Tisserand, Jean-Eric Tremblay, Jorien Vonk, Dustin Whalen, Marcel Babin
Summary: Climate warming in the Arctic is expected to change the distribution and dynamics of carbon in frozen grounds. Thawing permafrost in the Mackenzie River watershed releases organic matter into the Arctic Ocean, but its fate remains poorly understood. Field expeditions were conducted to study this process in the Mackenzie Delta region and southern Beaufort Sea, with the collaboration of local communities and the measurement of various physical, chemical, and biological variables.
EARTH SYSTEM SCIENCE DATA
(2023)