Article
Environmental Sciences
Huiqing Ma, Xinyue Liu, Zhaoqi Wen, Xianliang Yi, Yang Liu, Hao Zhou
Summary: This study reports a competitive Mn(II) removal during the microbial-induced carbonate precipitation process under nutrient-rich conditions, revealing the important role of urease in the indirect oxidation of Mn(II).
ENVIRONMENTAL RESEARCH
(2023)
Article
Geology
Zhaofu Gao, Xiangkun Zhu, Dan Wang, Chenxu Pan, Bin Yan, Jin Li
Summary: The Mn-carbonate ore at the Gaoyan deposit is formed by a combination of depositional environment and hydrothermal processes, as evidenced by geochemical characteristics such as high Mn/Fe ratios and high Ba content. The mixing of radiogenic Sr from hydrothermal sources and the occurrence of euxinic conditions with pyrite and rhodochrosite indicate the influence of hydrothermal contribution in the formation of sedimentary Mn mineralization. The slightly light carbon isotope compositions of the manganese carbonate ores suggest a limited carbon source from oxidation of organic material.
ORE GEOLOGY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Joti Rouillard, Britta Maier, Helmut Coelfen, Juan-Manuel Garcia-Ruiz
Summary: This paper demonstrates the significance of cross-catalytic coprecipitating systems in material design through a simple computational approach. These systems can self-organize into nanocomposite materials with various complex textures using a one-step synthesis protocol.
NANOSCALE ADVANCES
(2023)
Article
Geochemistry & Geophysics
Neha Mehta, Margot Coutaud, Julien Bouchez, Kirsten van Zuilen, Harold J. Bradbury, Frederic Moynier, Caroline Gorge, Feriel Skouri-Panet, Karim Benzerara
Summary: The study reveals that the cyanobacterium Gloeomargarita lithophora can selectively enrich lighter isotopes of barium and strontium. The isotope fractionation observed in this biological process is distinct from abiogenic and other biogenic carbonate formation cases, suggesting the existence of a back reaction. It highlights the potential influence of bacteria forming intracellular amorphous carbonates on environmental records and emphasizes the overlooked role of these bacteria in barium and strontium biogeochemical cycles.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geochemistry & Geophysics
Angeles Fernandez-Gonzalez, Alba Lozano-Letellier, Begona Fernandez
Summary: Selenium can become toxic due to its bioaccumulation potential, but can be immobilized by the mineral calcite. The incorporation of Se into calcite can be influenced by the presence of foreign ions in aqueous solution, affecting the precipitation of different phases such as vaterite and aragonite. The aging process of calcium carbonates precipitated from solutions highly supersaturated with respect to CaCO3 and slightly supersaturated with respect to CaSeO3 & BULL;H2O showed that vaterite hosting Se had low crystallinity and the transformation to calcite was inhibited.
Article
Geosciences, Multidisciplinary
Tao Li, David William Hedding, Jun Chen, Gaojun Li
Summary: This study used proxies based on Sr/Ca and Sr-87/Sr-86 of soil carbonate to reconstruct the evolution of effective precipitation and temperature in the East Asian semi-arid region. The results showed that during Marine Isotope Stage 5, stronger summer monsoon led to lower effective precipitation due to larger increase in evapotranspiration compared to monsoonal precipitation, indicating a risk of further aridification in the semi-arid region of East Asia under climate warming.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Engineering, Chemical
Sajjad Ali, Yaseen Iqbal, Khizar Hussain Shah, Muhammad Fahad
Summary: In this study, manganese carbonate was successfully precipitated by adjusting the proportion of manganese sulfate and sodium carbonate under different conditions. The structure and composition of the precipitated product were confirmed by X-ray diffraction and Fourier transform infrared spectroscopy. The reaction process was investigated through kinetic and thermodynamic parameters. The research results have important implications for manganese recovery.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Engineering, Geological
Jia He, Feng Yang, Yong-Shuai Qi, Chang-Hang Fang, Bo-Yang Yan, Yi Zhang, Lei Hang, Yu-Feng Gao
Summary: Enzyme-induced carbonate precipitation (EICP) is a promising method for improving soil properties, as demonstrated in this study using a meter-scale soil model to treat silty sand. The EICP treatment led to increased calcium carbonate content in the soil, improved penetration resistance, and enhanced peak deviatoric stresses and friction angle in triaxial CD tests. SEM and XRD analysis confirmed the presence of CaCO3 in the treated soil, indicating the potential of EICP for engineering applications in silty sand improvement.
Article
Geochemistry & Geophysics
Dylan L. Price, Ian B. Butler, Bryne T. Ngwenya, Linda A. Kirstein, Frank McDermott, Tiina O'Neill
Summary: Naturally occurring rare earth element (REE) bearing carbonate minerals contain different REEs, yet efforts to synthesize and understand their formation mechanisms have hitherto used single REE end-member experiments. In synthesising a mixed La-Nd carbonate, we find that the mixed REE carbonate has a broadly similar crystallisation pathway as its end-members with key differences. This research highlights the importance of considering multiple REEs simultaneously when studying the precipitation mechanisms of REE carbonates.
Article
Chemistry, Physical
Michael Ernst Boettcher, Peer-Lennart Gehlken, Wen Liang
Summary: In this study, the mid-infrared spectra of a newly discovered double carbonate BaFe[CO3](2) were reported for the first time. The spectra were compared with other Ba-bearing double carbonates, showing a decrease in absorption band wavenumbers with substitution of smaller cations. The carbon isotope shift coefficient agreed with theoretical predictions.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Qindan Xiao, Yuan Yuan, Juncheng Zhu, Zhicheng Shi, Zhong Li, Jiliang Zhu
Summary: A facile chemical co-precipitation method is reported for the preparation of nickel-cobalt layered double hydroxide (Ni, Co-LDH). The controlled introduction of carbonate ions (CO32-) through the addition of NaHCO3 causes the nanosheet structure to bend and inter-connect, increasing the contact area between the electrode and the electrolyte and enhancing the energy storage characteristics. Appropriate CO32- doping effectively increases the specific capacity and rate capability of Ni, Co-LDH.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biotechnology & Applied Microbiology
Chonghong Zhang, Fuchun Li
Summary: In this study, the characteristics of magnesium isotopes during the precipitation of calcite and aragonite in the presence of bacteria were investigated. It was found that light magnesium isotopes were preferentially incorporated into the precipitated solids. Significant magnesium isotope fractionation was observed between solids and liquid, as well as in the presence of bacteria.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2022)
Article
Engineering, Chemical
Xin Wan, Duan Liu, Yi Ye, Jianhong Luo
Summary: A novel membrane dispersion microreactor has been developed for the preparation of CaCO3 nanoparticles using a chemical coprecipitation method. The synthesized CaCO3 products show smaller particle size, lower cost, and higher efficiency compared with traditional methods, making it of important application value.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Energy & Fuels
Khosro Jarrahian, Morteza Aminnaji, Alexander Graham, Kenneth Sorbie
Summary: This study investigated the effect of particle size on the apparent adsorption of two scale inhibitors (DETPMP and VS-Co) onto carbonate. The results showed that particle size did not significantly affect the adsorption behavior. The retention behavior of DETPMP and VS-Co differed due to different functional groups and strengths of SI-Ca binding.
Review
Microbiology
Rongrong Wu, Fangting Yao, Xiaoya Li, Chongjing Shi, Xue Zang, Xiao Shu, Hengwei Liu, Wenchao Zhang
Summary: This review examines the essentiality, toxicity, and regulation of manganese, as well as traditional physicochemical methods for remediation. It focuses on the potential of microbial-mediated strategies for cost-efficient and eco-friendly bioremediation of manganese-polluted environments. A variety of microbial processes, including microbially induced carbonate precipitation, biosorption, bioaccumulation, and bio-oxidation, are discussed in detail, along with their mechanisms, influencing factors, strengths, and limitations. The combination of different techniques is recommended to enhance bioremediation efficiency. Future directions for manganese bioremediation by microbes are proposed.
Article
Geology
Paul Enos, Elias Samankassou
Summary: The Lofer cyclothems of the Alpine Upper Triassic share many similarities with Holocene sediments of Florida Bay, including symmetrical cycles and similar depositional textures and structures. These similarities suggest that sedimentation patterns at a small scale may be independent of the global climate regime, providing important insights into the Triassic depositional environment and future evolution of modern environments.
Article
Geochemistry & Geophysics
Gibran Romero-Mujalli, Jens Hartmann, Takahiro Hosono, Pascale Louvat, Koki Okamura, Pierre Delmelle, Thorben Amann, Michael E. Boettcher
Summary: This study investigates the contribution of hydrothermal fluids to solute export in the Aso caldera, southern Japan, showing that they account for 67 to 91% of the total sulphate flux at the caldera outlet. The results highlight the significant influence of hydrothermal fluids on the sulphur budget, indicating a strong connection between volcanic activity and biogeochemical cycling.
Article
Geosciences, Multidisciplinary
Jeanne Armelle Bilobe, Susanne Feist-Burkhardt, John Takem Eyong, Elias Samankassou
Summary: A palynological investigation of the Mamfe Basin in southwest Cameroon revealed a range of ages from early Barremian to Cenomanian and identified a level dated as Miocene to Pleistocene. The study indicated significant climatic variations, with three major paleoclimatic settings identified. The basin appears to have recorded regional climate fluctuations rather than local variations.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Chemistry, Physical
Michael Ernst Boettcher, Peer-Lennart Gehlken, Wen Liang
Summary: In this study, the mid-infrared spectra of a newly discovered double carbonate BaFe[CO3](2) were reported for the first time. The spectra were compared with other Ba-bearing double carbonates, showing a decrease in absorption band wavenumbers with substitution of smaller cations. The carbon isotope shift coefficient agreed with theoretical predictions.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Geosciences, Multidisciplinary
Sebastian Schaller, Michael E. Bottcher, Marius W. Buechi, Laura S. Epp, Stefano C. Fabbri, Natacha Gribenski, Ulrich Harms, Sebastian Krastel, Alina Liebezeit, Katja Lindhorst, Hanna Marxen, Ulli Raschke, David Schleheck, Iris Schmiedinger, Antje Schwalb, Hendrik Vogel, Martin Wessels, Flavio S. Anselmetti
Summary: Lake Constance's modern basin, which is over 250 m deep, represents the underfilled northern part of a glacially overdeepened trough that extends well into the Alps at its southern end. A seismic survey of the lake revealed a Quaternary sediment fill of over 150 m thickness, representing at least the last glacial cycle. This sediment fill consists of ice-contact deposits at the base, overlain by glaciolacustrine to lacustrine sediments.
SWISS JOURNAL OF GEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Bettina Schaefer, Lorenz Schwark, Michael E. Bottcher, Vann Smith, Marco J. L. Coolen, Kliti Grice
Summary: This study utilized biomarker and stable isotope data to analyze the depositional and environmental changes in the Chicxulub impact crater during the Early Eocene, and found elevated sea surface temperature and increasing organic matter content in the sediment sequence, potentially influenced by upwelling.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
E. M. O'Sullivan, T. F. Naegler, E. C. Turner, B. S. Kamber, M. G. Babechuk, S. P. O'Hare
Summary: This study investigates marine palaeoredox conditions in the mid-Neoproterozoic era. Analyzing samples from the Stone Knife Formation in NW Canada, the study reveals different isotope characteristics in different types of carbonates and shales, suggesting the influence of various factors in Mo pathway into microbial carbonates. The results indicate a relatively stable Mo oxic sink throughout the Proterozoic, shifting the apparent expansion of oxygen towards the younger boundary of the Neoproterozoic Oxygenation Event.
PRECAMBRIAN RESEARCH
(2022)
Article
Biochemical Research Methods
Michael Ernst Boettcher, Torsten W. Vennemann
Summary: The kinetic oxygen isotope fractionation during the reaction of natural and synthetic norsethite (BaMg(CO3)(2)) with orthophosphoric acid was examined for the first time. The results show a significant dependence on temperature. The fractionation factor for other double carbonates at 25 degrees C can be estimated based on the published results.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Geosciences, Multidisciplinary
R. Zammit, C. H. Lear, E. Samankassou, L. J. Lourens, A. Micallef, P. N. Pearson, O. M. Bialik
Summary: This article examines the alternating humid and arid intervals in North Africa during the Miocene, focusing on the impact of the restriction of the Mesopotamian Seaway and the global climate. It provides valuable insights into the regional hydroclimate and highlights the importance of tectonic forcing and ocean circulation patterns in the evolution of the West African Monsoon system.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Multidisciplinary Sciences
Jeanne Armelle Bilobe, John Takem Eyong, Elias Samankassou
Summary: The Cretaceous and Neogene deposits in the Mamfe Basin were studied to understand their sediment source, environment, and tectonic regime. The results show that the sediments are immature and likely originated from nearby igneous and metamorphic rocks. The chemical and trace element analyses indicate low to moderate weathering and suggest an arid to semi-arid depositional environment. The geochemical proxies reveal a predominance of oxic conditions during deposition, but also episodic reducing conditions in the basin. Overall, this study provides valuable information about the sedimentary processes and paleoenvironment in the Mamfe Basin.
Article
Geosciences, Multidisciplinary
Manga Owona Gaspard William, Bessong Moise, Mioumnde Arthur Paterne, Mbesse Cecile Olive, Bapowa Laouna Carole, Kusi Micheline Michelle-Alexia Ngum, Meying Arsene, Ekomane Paulin Emile, Samankassou Elias
Summary: This paper focuses on the lithostratigraphy and the palaeoenvironmental evolutions of the Babouri-Figuil Basin depositional system. The study reveals that the basin's sedimentary formations were deposited in a lacustrine/fluvial/deltaic sedimentary environment, which were influenced by volcanic events and hydrothermal fluid circulation.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Ecology
Damian L. Arevalo-Martinez, Amir Haroon, Hermann W. Bange, Ercan Erkul, Marion Jegen, Nils Moosdorf, Jens Schneider von Deimling, Christian Berndt, Michael Ernst Boettcher, Jasper Hoffmann, Volker Liebetrau, Ulf Mallast, Gudrun Massmann, Aaron Micallef, Holly A. Michael, Hendrik Paasche, Wolfgang Rabbel, Isaac Santos, Jan Scholten, Katrin Schwalenberg, Beata Szymczycha, Ariel T. Thomas, Joonas J. Virtasalo, Hannelore Waska, Bradley A. Weymer
Summary: For thousands of years, humans have been attracted to coastlines for their resource potential and as geopolitical centers. The supply and demand of potable water are crucial for water security in coastal communities, but the interaction between freshwater and saltwater in coastal settings is complicated by natural and human-driven environmental changes. Understanding groundwater fluxes across the land-sea continuum is important for (bio)geochemical budgets and the potential use of offshore freshened groundwater as a resource. Assessing land-ocean connectivity through groundwater requires a multidisciplinary approach and is relevant for climate change, pollution, and sustainable development goals.
Article
Multidisciplinary Sciences
Tania L. Maxwell, Andre S. Rovai, Maria Fernanda Adame, Janine B. Adams, Jose Alvarez-Rogel, William E. N. Austin, Kim Beasy, Francesco Boscutti, Michael E. Boettcher, Tjeerd J. Bouma, Richard H. Bulmer, Annette Burden, Shannon A. Burke, Saritta Camacho, Doongar R. Chaudhary, Gail L. Chmura, Margareth Copertino, Grace M. Cott, Christopher Craft, John Day, Carmen B. de los Santos, Lionel Denis, Weixin Ding, Joanna C. Ellison, Carolyn J. Ewers Lewis, Luise Giani, Maria Gispert, Swanne Gontharet, Jose A. Gonzalez-Perez, M. Nazaret Gonzalez-Alcaraz, Connor Gorham, Anna Elizabeth L. Graversen, Anthony Grey, Roberta Guerra, Qiang He, James R. Holmquist, Alice R. Jones, Jose A. Juanes, Brian P. Kelleher, Karen E. Kohfeld, Dorte Krause-Jensen, Anna Lafratta, Paul S. Lavery, Edward A. Laws, Carmen Leiva-Duenas, Pei Sun Loh, Catherine E. Lovelock, Carolyn J. Lundquist, Peter Macreadie, Ines Mazarrasa, J. Patrick Megonigal, Joao M. Neto, Juliana Nogueira, Michael J. Osland, Jordi F. Pages, Nipuni Perera, Eva-Maria Pfeiffer, Thomas Pollmann, Jacqueline L. Raw, Maria Recio, Ana Carolina Ruiz-Fernandez, Sophie K. Russell, John M. Rybczyk, Marek Sammul, Christian Sanders, Rui Santos, Oscar Serrano, Matthias Siewert, Craig Smeaton, Zhaoliang Song, Carmen Trasar-Cepeda, Robert R. Twilley, Marijn Van de Broek, Stefano Vitti, Livia Vittori Antisari, Baptiste Voltz, Christy N. Wails, Raymond D. Ward, Melissa Ward, Jaxine Wolfe, Renmin Yang, Sebastian Zubrzycki, Emily Landis, Lindsey Smart, Mark Spalding, Thomas A. Worthington
Summary: Tidal marshes are significant carbon reservoirs, and a global dataset of soil organic carbon provides valuable information for researchers and policy-makers. The dataset includes geographic locations, soil depths, and organic carbon data, allowing for estimation of organic carbon stocks in tidal marsh soils.
Article
Ecology
Bryce Van Dam, Nele Lehmann, Mary A. Zeller, Andreas Neumann, Daniel Proefrock, Marko Lipka, Helmuth Thomas, Michael Ernst Boettcher
Summary: This study quantified the net sediment-water exchange of alkalinity using multiple methods and found that the sediment-water irrigation rates in the southern North Sea were higher than previously estimated. The net alkalinity fluxes in the Baltic Sea were relatively low, while carbonate mineral dissolution, precipitation, and sulfide re-oxidation appeared to play important roles in shaping net sediment-water fluxes in the North Sea and Baltic Sea.
Article
Ecology
Cordula Nina Gutekunst, Susanne Liebner, Anna-Kathrina Jenner, Klaus-Holger Knorr, Viktoria Unger, Franziska Koebsch, Erwin Don Racasa, Sizhong Yang, Michael Ernst Boettcher, Manon Janssen, Jens Kallmeyer, Denise Otto, Iris Schmiedinger, Lucas Winski, Gerald Jurasinski
Summary: This study investigated the effects of brackish water inflow on microbial communities and methane production-consumption dynamics in a freshwater rewetted fen. The results showed that the brackish water inflow and preceding drought increased sulfate availability but did not hinder methane production or increase methane consumption. Methane oxidation may occur in the water column or organic litter on the ground.
