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Mobilization and transformation of antimony in stibnite by microbial induced oxidation in mining environment Appl. Geochem. (IF 3.4) Pub Date : 2024-04-13 Shu Li, Guofang Pan, Xiaoqian Li, Aiguo Zhou, Ningjie He
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Employing machine learning to predict the occurrence and spatial variability of high fluoride groundwater in intensively irrigated areas Appl. Geochem. (IF 3.4) Pub Date : 2024-04-10 Zhou Xiangcao, Chunli Su, Xie Xianjun, Weili Ge, Ziyi Xiao, Liangping Yang, Hongjie Pan
Groundwater serves as a vital source of drinking water in the Hetao Basin of northwestern China. However, the occurrence and intense spatial variability of high fluoride (F>1.5 mg/L) groundwater poses a significant health threat to local residents. In this study, the Random Forest (RF) machine learning algorithm was employed to develop two prediction models for high fluoride groundwater in Qiantao
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Cation exchange parameters for Opalinus Clay and its confining units Appl. Geochem. (IF 3.4) Pub Date : 2024-04-07 Paul Wersin, Lukas Aschwanden, Mirjam Kiczka
The knowledge of cation exchange parameters is important to understand and model the porewater chemistry in clayrocks. The Opalinus Clay (OPA) is a well-studied formation in view of its importance as host rock for radioactive waste repositories, but uncertainties exist regarding its cation exchange parameters, in particular its selectivity coefficients (K). In fact, porewater chemistry models for OPA
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Insights on the effects of carbonates and phosphates on the hydration of magnesia (alumino-)silicate cements Appl. Geochem. (IF 3.4) Pub Date : 2024-04-07 Ellina Bernard, Marcus Yio, Daniel Rentsch, Hongkang Chen, Rupert J. Myers
Cements based on magnesium oxide (MgO) and reactive (alumino-)silicates (xSiO-yAlO) have drawn increasing attention owing to their potential to be produced using raw materials with low CO emissions. This study examines how the phase assemblages and compressive strengths of magnesia (alumino-)silicate cements are influenced by the addition of sodium hexametaphosphate (NaHMP) and sodium carbonate (NaCO)
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The impact of geochemical and life-cycle variables on carbon dioxide removal by enhanced rock weathering: Development and application of the Stella ERW model Appl. Geochem. (IF 3.4) Pub Date : 2024-04-06 James Jerden, Meteb Mejbel, Antonio Nilson Zamunér Filho, Monica Carroll, Joanna Campe
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Controls on riverine magnesium isotopic composition: Evidence from mono-lithological catchments Appl. Geochem. (IF 3.4) Pub Date : 2024-04-05 Tong Zhao, Wenjing Liu, Zhifang Xu, Hao Jiang, Li Zhou
The magnesium isotopic composition (δMg) of river water could provide evidence for continental weathering and the global Mg cycle. However, constraining the lithological and isotope fractionation controls on river δMg is still a challenge. Here, we investigated δMg of various compartments in granitic and basaltic catchments, and δMg of river water in sandstone catchments in the Southeastern Tibetan
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Application of portable multi-component gas analyzer to mineral exploration in semi-arid steppes of northern China: A case study from the Qinjiaying Ag–Pb–Zn prospect Appl. Geochem. (IF 3.4) Pub Date : 2024-04-02 Zhizhong Cheng, Qiang Wang, Chenggui Lin, Changkai Qiu, Tingjie Yan, Huixiang Yuan
Soil gases, particularly sulfur gases, have not been widely used in mineral exploration due to their high mobility and reactivity. However, our team developed a portable multi-component gas analyzer (PMGA) capable of on-site and real-time measurement of HS, SO, CH, and CO concentrations in soil gas. This study showcases the applicability and effectiveness of PMGA in the geochemical exploration of concealed
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Integrated stable S isotope, microbial and hydrochemical analysis of hydrogen sulphide origin in groundwater from the Legnica-Głogów Copper District, Poland Appl. Geochem. (IF 3.4) Pub Date : 2024-03-31 Elżbieta Bilkiewicz, Andrzej Borkowski, Robert Duda, Paweł Działak, Tomasz Kowalski, Roman Becker
Hydrogen sulphide (HS) was first reported in 2010 in an underground mining area of the Legnica-Głogów Copper District (LGCD). However, during the deposit exploration and exploitation stage in 1970, HS was not detected. Previous studies have not indicated the origin of HS in LGCD mine waters. Indirect evidence has suggested that, most likely, HS migrated with the groundwater from the Main Dolomite aquifer
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Evaluation of the speciation and availability of Cu, Sn, Bi and U from lacustrine sediments influenced by former mining activities Appl. Geochem. (IF 3.4) Pub Date : 2024-03-30 Louise Darricau, Arnaud Mangeret, Josselin Gorny, Emmanuel Joussein, Sebastian Schoeder, Jean-Louis Reyss, Antoine Thouvenot, Alexandra Courtin
Managing reservoir sediments remains challenging due to their propensity to significantly sequestrate trace elements. Moreover, many artificial reservoirs were located downstream of former mining sites. However, the knowledge of the exact trace element speciation and its fate in sediments submitted to reoxidation and drying events, such as dredging operations, is still limited.
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Mobility of water and ions in partially water-saturated compacted MX-80 bentonite in relation with swelling pressure Appl. Geochem. (IF 3.4) Pub Date : 2024-03-29 S. Savoye, J. Wang, L. Desert, S. Lefevre, J.C. Robinet, P. Gouze
Many countries are planning to host long-lived high- and intermediate-level radioactive waste in disposal facilities sited in deep argillaceous formations. Bentonite, as a swelling material, is often chosen as engineered buffers due to its low permeability and high swelling capacity. However, its properties can be influenced by the hydraulic/gas conditions prevailing in-situ that are expected to change
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Deciphering the corrosion puzzle: Nano-iron-biochar composite – Not a quick fix for metal immobilization in peat soils Appl. Geochem. (IF 3.4) Pub Date : 2024-03-29 Denis A. Pankratov, Elvira A. Dovletyarova, Alexander P. Zhikharev, Alexander Gusev, Carolina Yáñez, Alexander Neaman
The use of zero-valent iron nanoparticles in the remediation of metal-contaminated soils has received considerable attention. Upon introduction into the soil, zero-valent iron particles corrode into iron oxides, known for their high adsorption capacity for potentially toxic metals. While limited research has directly compared zero-valent iron micro- and nanoparticles, it is important to investigate
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Metallogenetic epoch and material source of Be-pegmatite differentiated from biotite granite in Mufushan complex Appl. Geochem. (IF 3.4) Pub Date : 2024-03-28 Xuefeng Wang, Peng Li, Jiankang Li, Xuemei He, Peiyu Li, Pengfei Jiang, Wensheng Zhang, Jin Yin
The Mufushan Complex (MFSC) is a significant rare metal mineralized in the central China district and is renowned for its marked economic value of rare metal deposits. While the main rare metal mineralization (RMM) stage in the MFSC relates to the magmatic event of two-mica monzogranite, the mineralization event related to biotite monzogranite remains unknown. To fill this gap, this study focuses on
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Multiple isotope approach elucidates the calcium enrichment of groundwater in the central Yangtze River Basin Appl. Geochem. (IF 3.4) Pub Date : 2024-03-28 Yijun Yang, Yamin Deng, Xianjun Xie, Yanxin Wang
Understanding the Ca isotope variability of groundwaters in carbonate- or silicate-dominated catchments could provide new insights into processes controlling the Ca isotope fluxes in the global Ca budget. Two geographically close but lithologically different sites were investigated along the middle reaches of the Yangtze River, where Xiangxi River Basin drains carbonate rocks and Jianghan Plain drains
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The deleterious role of gangue mineralogy in copper extraction: A case study of poor recovery in leaching low-grade Cu ores Appl. Geochem. (IF 3.4) Pub Date : 2024-03-28 Nicholas D. Owen, Rahul Ram, Luke Vollert, Brigitte Seaman, Barbara Etschmann, Yanlu Xing, Mareike Rosemann, Luis Verdugo, John O'Callaghan, Joël Brugger
In a series of four extended industrial column leach experiments spanning 542 days, aimed at examining Cu-recovery from low-grade sulfide ores, all instances yielded suboptimal Cu recovery rates (<27%). Through a nuanced analysis integrating time-resolved chemical data on leachate with detailed mineralogical investigations, we highlight that the dissolution of aluminosilicate gangue minerals is a pivotal
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Time-lapse 3D Micro-tomography of Calcite Column Experiments to Study pH-Dependent Dynamic Dissolution Processes Appl. Geochem. (IF 3.4) Pub Date : 2024-03-27 Kuldeep Singh, A.T.M. Shahidul Huqe Muzemder, Dave Edey, Matthew Colbert, Jessica Maisano, Babak Shafei
We investigated the spatiotemporal evolution of calcite dissolution processes using time-lapse high-resolution X-ray CT imaging of live column experiments and real-time data logging of effluent pH and TDS. We evaluated the sensitivity of three pH solutions (7, 5, and 4) to dissolution processes. The results showed spatial variations in dissolution associated with spatial variation in porosity and pore
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Analysis of natural organic matter chemistry in bentonite clay under compaction using different dry densities and duration Appl. Geochem. (IF 3.4) Pub Date : 2024-03-27 Meiling Man, Huan Tong, Nivetha Srikanthan, Muhammed O. Usman, Claire S. Tully, James J. Noël, Mehran Behazin, W. Jeffrey Binns, Peter G. Keech, Myrna J. Simpson
The Nuclear Waste Management Organization of Canada has adopted an adaptive phased management plan for the long-term storage of used nuclear fuel in a Deep Geological Repository (DGR). The DGR barrier system employs copper-coated used fuel containers (UFCs) surrounded by buffer material which is composed of highly compacted bentonite clay. The natural organic matter (NOM) composition of the compacted
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Migration of transition metals and potential for carbon mineralization during acid leaching of processed kimberlite from Venetia diamond mine, South Africa Appl. Geochem. (IF 3.4) Pub Date : 2024-03-26 Baolin Wang, Nina Zeyen, Sasha Wilson, Makoto J. Honda-McNeil, Jessica L. Hamilton, Konstantin Von Gunten, Daniel S. Alessi, Thomas R. Jones, David J. Paterson, Gordon Southam
Carbonation of mafic and ultramafic rocks and mineral wastes provides a permanent way to sequester excess atmospheric CO. Recent research has shown that this method also offers the potential for enhanced recovery of critical metals from mine tailings. In this study, processed kimberlite from the Venetia diamond mine (South Africa) was used in column acid leaching experiments to assess both its carbonation
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Lead bioaccessibility and commonly measured soil characteristics in Detroit, Michigan Appl. Geochem. (IF 3.4) Pub Date : 2024-03-25 Sabrina R. Good MS, Allison R. Harris, Patrick Crouch, Conor T. Gowan, William D. Shuster, Shawn P. McElmurry
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A long-term perspective on coal combustion solid waste interacting with urban soil Appl. Geochem. (IF 3.4) Pub Date : 2024-03-23 Rafał Tyszka, Artur Pędziwiatr, Anna Pietranik, Jakub Kierczak, Vojtěch Ettler, Martin Mihaljevič, Grzegorz Zieliński
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Spatial patterns and controlling factors of radon concentration in Quaternary alluvial-lacustrine aquifer systems Appl. Geochem. (IF 3.4) Pub Date : 2024-03-20 Jiawen Xu, Yao Du, Xiaoliang Sun, Yamin Deng, Shunjie Zhu, Peng Han, Yiqun Gan
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A remembrance of Steve Banwart (1959–2023) Appl. Geochem. (IF 3.4) Pub Date : 2024-03-16 Nikolaos P. Nikolaidis, Janet Hering, Timothy S. White, François Chabaux, Orfan Shouakar-Stash
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Interaction of cemented paste backfill (CPB) and circumneutral mine water during column experiments Appl. Geochem. (IF 3.4) Pub Date : 2024-03-15 Soili Solismaa, Muhammad Muniruzzaman, Jukka Kuva, Małgorzata Szlachta, Simo Hyvönen, Päivi Kauppila, Tommi Kauppila
Cemented paste backfill (CPB) is used as a support and filler material in underground mines. In underground conditions, before mine closure and flooding, surface and groundwaters with variable quality are in contact with CPB material, which may result in the leaching of harmful substances from the CPB. In this study, we used actual mine water from a gold mine to flush CPB in a laboratory test to simulate
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Exploring the potential of stable isotope methods for identifying the origin of CO2 in the carbonation process of cementitious materials within the carbon capture and storage environment Appl. Geochem. (IF 3.4) Pub Date : 2024-03-14 Victor Hugo Jacks Mendes dos Santos, Darlan Pontin, Pâmela de Medeiros Engelmann, Victor Kovaski Cescani, João Pedro Tauscheck Zielinski, Rosalia Barili, Clarissa Lovato Melo, Felipe Dalla Vecchia
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Cadmium accumulation in soil resulting from application of biogas digestate and wood ash – Mass balance modelling Appl. Geochem. (IF 3.4) Pub Date : 2024-03-11 Jon Petter Gustafsson, Marie-Cécile Affholder, A. Sigrun Dahlin
This study investigates the impact of substituting conventional NPK fertilizer with wood ash and biogas digestates at an agricultural field site in southwest Sweden. A three-year field experiment, comprising a crop rotation cycle of spring wheat, winter wheat, and oats, was conducted. The obtained results were employed to establish a dynamic mass balance model for the A horizon of the soil at the site
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Factors controlling lithium accumulation in brines from Upper Cretaceous to Lower Eocene aquifers of a continental evaporite basin Appl. Geochem. (IF 3.4) Pub Date : 2024-03-10 Xiaocan Yu, Chunlian Wang, Hua Huang, Jiuyi Wang
The origin of deep-seated Li-rich brines in a continental evaporite basin remains poorly understood. To clarify hydrogeochemical processes governing the Li enrichment, this study investigated chemical compositions and multi-isotopic (H–O–Li–Sr) features of a set of water samples from Upper Cretaceous to Lower Eocene sedimentary brines, saline groundwaters and oilfield brines, thermal waters and surficial
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Source appointment of δ13C in sediments of a maar lake in southern China: Implications of fossil fuel CO2 emissions Appl. Geochem. (IF 3.4) Pub Date : 2024-03-09 Meiling Guo, Yongming Han, Weiguo Liu, Yunning Cao, Dewen Lei, Weijian Zhou, Zhisheng An
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Influence of dam on the distribution of solid iron species in riparian sediment particles at different sizes Appl. Geochem. (IF 3.4) Pub Date : 2024-03-09 Yuxi Lu, Weijun Zhao, Peng Zhang, Hui Liu, Songhu Yuan
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Can the Gondwana, Oligocene, and Palaeocene-Eocene coals of India be used as a strontium isotope chronometer? Appl. Geochem. (IF 3.4) Pub Date : 2024-03-08 Avijit Das, Rajeev Kumar, Subhra Sarita Patel
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Enrichment of arsenic in the Yarlung Tsangpo basin, Southern Tibetan Plateau: Provenance, process, and link with tectonic setting Appl. Geochem. (IF 3.4) Pub Date : 2024-03-07 Li Zhou, Zhifang Xu, Peikuan Fan, Jianwei Zhou
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Chemical composition of soil humin in an organic soil profile Appl. Geochem. (IF 3.4) Pub Date : 2024-03-07 Jeewan Gamage, Paul Voroney, Adam W. Gillespie, James Longstaffe
Humin is identified as the most recalcitrant fraction of soil organic matter, but its synthesis and depth variability in the soil profile are unknown. Here, we suggest that carboxyl-rich alicyclic structures (CRAM) and fused aromatic ring structures (FAR) can process significant components of the humin structure. We conducted molecular-level characterization of humin using advanced solid-state nuclear
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Medical Geology: A Tribute to Olle Selinus (1943–2023) Appl. Geochem. (IF 3.4) Pub Date : 2024-03-04 Chaosheng Zhang, Anna Ladenberger, Jose Centeno, Robert Finkelman, Hassina Mouri
Olle Selinus (1943.6.27–2023.11.18) was born in Cardiff, Wales in Great Britain. He studied at Uppsala University where he received his PhD in minerology-petrology in 1971. Then Olle Selinus started his position as a geochemist and State Geologist at Geological Survey of Sweden (SGU), where he continued working for 39 years until his retirement in 2010. The most significant contribution of Olle Selinus
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History of anthropogenic faece and sewage contamination to Lake Erhai in southwestern China over the past ∼200 years Appl. Geochem. (IF 3.4) Pub Date : 2024-03-02 Yuxin He, Yue Chen, Can Zhang, Yanhong Xu, Luyi Cai
Over the past decades, faece and sewage pollution from agricultural and industrial activities has induced severe eutrophication and ecosystem deterioration of Lake Erhai in southwestern China. Investigations on the anthropogenic faece and sewage input from both spatial and historical viewpoints are of great values for recovery strategies. In this study, we investigated fecal steroids in surface sediments
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Timescale of radium and alkaline earth cations ascent in the trees: Use of isotopic (228Ra/226Ra) ratio Appl. Geochem. (IF 3.4) Pub Date : 2024-03-02 Sophie Rihs, Eric Lascar, François Chabaux, Laurent Pourcelot, Philippe Calmon, Paul-Olivier Redon, Catherine Galy, Marie-Pierre Turpault
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Sources and transformation of nitrate in an agricultural riverine reservoir watershed of the Sichuan Basin Appl. Geochem. (IF 3.4) Pub Date : 2024-03-01 Fen Xu, Kexin He, Hong Wang, Xiaoxia He, Yaqian Zhou, Jie Qin, Lishan Wu, Rui Yang, Jianfei Yuan
Elucidating the origins and transformations of nitrate in groundwater and surface water within agricultural regions is imperative for effectively managing watershed contamination and environmental improvement. This study conducted a comprehensive geochemical investigation using multiple stable isotopes (D-HO and O–HO, N–NO and O–NO, and N–NH) and hydrogeochemical characteristics to explore the potential
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Hydrogeochemical evolution and characterization study in volcanic lakes of the Azores archipelago (Portugal) Appl. Geochem. (IF 3.4) Pub Date : 2024-02-28 César Andrade, J Virgílio Cruz, Fátima Viveiros, Lúcia Moreno, Letícia Ferreira, Rui Coutinho
A hydrogeochemical study was performed on 45 lakes spread across six islands of the Azores archipelago (Portugal). Water temperature of the studied lakes is cold (mean = 16.2 °C), and the deeper lakes depict a monomictic behaviour, with water column stratification during summer resulting in higher carbon dioxide concentrations in the hypolimnion. Samples present an acid to neutral pH (mean = 7.04)
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Carbon dioxide removal via weathering of sugarcane mill ash under different soil conditions Appl. Geochem. (IF 3.4) Pub Date : 2024-02-24 Hannah Green, Peter Larsen, Yang Liu, Paul N. Nelson
Sugarcane mill ash has been suggested as having high potential for carbon dioxide removal (CDR) via enhanced weathering (EW), but this had not been quantitatively assessed. The aims of this study were to 1) assess the CDR potential of various sugarcane mill ashes via EW, and 2) investigate the impact of soil conditions and mill ash properties on the CDR. This was done by characterising physical and
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Compositional balance analysis: A novel method for tectono-geochemical anomaly identification and blind ore deposit prediction Appl. Geochem. (IF 3.4) Pub Date : 2024-02-23 Yue Liu, Qinglin Xia
Tectono-geochemical exploration always involves the study of tectono-geochemical primary halos. From the perspective of compositional data analysis, this study introduced how to use compositional balance analysis (CoBA) method to recognize tectono-geochemical anomalies and infer blind ore deposits in the deep. A case study for prediction of concealed Pb–Zn ore deposits based on tectono-geochemical
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Determining Fe concentration and speciation in waters with high natural organic matter content Appl. Geochem. (IF 3.4) Pub Date : 2024-02-20 Wei Li, Tianming Wang, Stephen Boult
Valency, solubility and size of Fe are important controls on quality of natural waters. Recent recognition of the ubiquitous influence of natural organic matter on these, means that wider monitoring of Fe species in waters containing organic matter is required. We assess and develop methods that explicitly recognize this need. We show that for water samples prepared by acidification and filtration
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Antimony isotope fractionation during Sb(V) and Sb(III) adsorption on secondary Fe-minerals (schwertmannite, ferrihydrite) typical of mine waters Appl. Geochem. (IF 3.4) Pub Date : 2024-02-20 Colin Ferrari, Eléonore Resongles, Rémi Freydier, Corinne Casiot
The application of antimony (Sb) isotopes as tracers for Sb environmental cycling is currently limited. Indeed, there is a lack of knowledge of isotope fractionation factors associated with key (bio-) geochemical processes controlling its behaviour in surface environments. This study investigated the equilibrium isotope fractionation generated by Sb(V) and Sb(III) sorption on two iron minerals typical
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Quantitative characterization of the effect of compaction rate on ammonium release from clayey sediments Appl. Geochem. (IF 3.4) Pub Date : 2024-02-20 Bolin Zheng, Teng Ma, Cong Xiao, Wenkai Qiu, Ziqi Peng
Ammonium-rich pore water will release from clayey sediments into adjacent aquifers during aquitards compaction, which can adversely affect groundwater quality. Differences in the rate of groundwater exploitation can lead to differences in the rate of compaction of aquitards, which may, to some extent, affect the release of chemical components of the pore water from the aquitard. However, the effect
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Modelling CO2 recycling to the atmosphere after CO2 sequestration with ground basalt Appl. Geochem. (IF 3.4) Pub Date : 2024-02-19 Michael O. Schwartz
Ground basalt mixed with agricultural fertilizer acts as a sink for atmospheric carbon dioxide (CO). The constituents of dissolving basalt form carbonate minerals through reaction with aqueous carbon species. The carbonate minerals start dissolving towards the end of the basalt dissolution process, leading to an increase in the CO partial pressure (p) of the soil pore fluid. The pathway of possible
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Spatial pattern, hydrogeochemical controlling processes and non-carcinogenic risks of fluoride-enriched groundwater in the North Henan Plain, Northern China Appl. Geochem. (IF 3.4) Pub Date : 2024-02-14 Mengzhu Wang, Chunli Su, Xianguo Wang, Jiaqi Jiang, Feifei Ren, Haifeng Liu
High fluoride (F) groundwater (F>1.5 mg/L) widely occurred in the North Henan Plain, located in the arid and semi-arid region of the lower reaches of the Yellow River, which poses a threat to the health of local residents. Seventy-six groundwater samples were collected from the quaternary aquifers in 2022 to explore the spatial pattern of F, hydrogeochemical evolution processes, and driving factors
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Qingshan sanidine (QSs): A new mesozoic 40Ar/39Ar dating standard tied to the M0r (Barremian–Aptian boundary) Appl. Geochem. (IF 3.4) Pub Date : 2024-02-12 Yinzhi Wang, Liekun Yang, Wenbei Shi, Lin Wu, Fei Wang
Accurate Ar/Ar dating requires a standard (neutron fluence monitor) of an appropriate age to minimize the range of isotopic ratios to be measured between standard and unknown samples. Here we present a new Cretaceous standard, i.e., Qingshan sanidine (QSs), from the Jiaolai Basin in Shandong Province, China. In situ major element analysis revealed high and consistent K contents within QSs grains. Overall
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Radium sorption on crystalline rock; spatial distribution and sorption modeling study Appl. Geochem. (IF 3.4) Pub Date : 2024-02-07 Otto Fabritius, Anita Fabritius, Marsha Hellings, Tatiana Sorokina, Tiina Sojakka, Anna-Maria Jakobsson, Xiaodong Li, Juuso Sammaljärvi, Marja Siitari-Kauppi
Spent nuclear fuel from the Finnish and Swedish nuclear power plants will be permanently disposed of in deep geological disposal facilities located on the coast of the Baltic Sea. As a part of the disposal's safety case, the migration properties of the safety-relevant spent nuclear fuel-borne radionuclides, such as the radionuclide progeny of the waste component U, Ra, need to be assessed in the lithosphere
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Sulfate enhances the adsorption and retention of Cu(II) and Zn(II) to dispersed and aggregated iron oxyhydroxide nanoparticles Appl. Geochem. (IF 3.4) Pub Date : 2024-02-06 Emma M. Kocik, Abigail Kim, Miranda L. Aiken, Lauren Smith, Christopher S. Kim
The adsorption and retention of metal ions to nanoscale iron (hydr)oxides in aqueous systems is significantly influenced by prevailing environmental conditions. We examined the influence of sulfate, the second most common anion in seawater that is present in many other natural aquatic systems, on the adsorption and retention of Cu(II) and Zn(II) to synthetic iron oxyhydroxide nanoparticles (NPs) and
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U(VI) sorption on illite in the presence of carbonate studied by cryogenic time-resolved laser fluorescence spectroscopy and parallel factor analysis Appl. Geochem. (IF 3.4) Pub Date : 2024-02-05 Huiyang Mei, Noboru Aoyagi, Takumi Saito, Kazuya Tanaka, Yuki Sugiura, Yukio Tachi
Identification of sorption species of uranium (U) on clay minerals by spectroscopic techniques would consolidate the reliability of predicted sorption models. However, it is still challenging, especially, under complex environmental conditions, where the surface loading is low, and quenching elements for spectroscopic analyses hamper the application. In light of this, the sorption of U(VI) on illite
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Modeling of a radionuclide transport experiment in granitic rock matrix at the Grimsel Test Site (Switzerland). The role of advection. Appl. Geochem. (IF 3.4) Pub Date : 2024-02-03 Josep M. Soler, Deby Jurado, Maarten W. Saaltink, Lurdes Martínez, Juan J. Hidalgo, G. William Lanyon, Martin Heule, Yuta Fukatsu, Marja Siitari-Kauppi, Vaclava Havlová, Eva Bedrníková, Andrew J. Martin
Within the framework of the GTS-LTD project (Grimsel Test Site – Long-Term Diffusion), a radionuclide transport experiment in unfractured granitic rock matrix was performed. Grimsel groundwater containing several radionuclide tracers (H as HTO, Cl, Na, Cs, Ba) was continuously circulated through a packed-off borehole interval. The decrease in tracer concentrations in the solution was monitored for
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Road salt-induced salinization impacts water geochemistry and mixing regime of a Canadian urban lake Appl. Geochem. (IF 3.4) Pub Date : 2024-02-02 Jovana Radosavljevic, Stephanie Slowinski, Fereidoun Rezanezhad, Mahyar Shafii, Bahram Gharabaghi, Philippe Van Cappellen
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Reconstructing the temperature and origin of CO2 mineralisation in CarbFix calcite using clumped, carbon and oxygen isotopes Appl. Geochem. (IF 3.4) Pub Date : 2024-02-01 C.M. Holdsworth, C.M. John, S.Ó. Snæbjörnsdóttir, G. Johnson, B. Sigfússon, R. Leslie, R.S. Haszeldine, S.M.V. Gilfillan
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New insights into aluminosilicate gel from acetic acid attack of hydrated Portland cement: Experimental and thermodynamic characterization Appl. Geochem. (IF 3.4) Pub Date : 2024-01-24 Cédric Roosz, Marie Giroudon, Laurie Lacarrière, Matthieu Peyre Lavigne, Cédric Patapy, Alexandra Bertron
Many concrete structures in aqueous environments suffer leaching, affecting their microstructure and durability. The resulting chemical and mineralogical degradation are difficult to predict over the long term and for environments of varying chemical composition, especially for severely degraded cement matrices. This is mainly because of the lack of chemical and thermodynamic data on the degraded phases
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A study on the classification of geological background source cadmium migration phases in Zhejiang Province, China Appl. Geochem. (IF 3.4) Pub Date : 2024-01-24 Wenda Zhou, Xinzhe Lu, Shuyun Xie, Chunlei Huang, Jinghe Wang, Kegan Guo, Zhengyu Bao
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Hidden Markov model for spatial analysis of three-dimensional mineralization distribution: Insights into magma flow and mineral exploration targets in the Jinchuan Ni-Cu-(PGE) sulfide deposit, China Appl. Geochem. (IF 3.4) Pub Date : 2024-01-20 Hao Deng, Juexuan Huang, Zhankun Liu, Longjiao Li, Xinyu Liu, Xi Wang, Jin Chen, Zequan Wu, Xiancheng Mao
The spatial distribution of mineralization includes significant clues about the magma/fluid flow process for ore formation. However, given the complex nature of the ore-forming process and its weak signature in the mineralization data, revealing the magma/fluid flow process in their mineralization footprint presents a considerable challenge. In this paper, we present a hidden Markov model (HMM) for
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Describing geochemical backgrounds of lithium in rock-soil-sediment systems Appl. Geochem. (IF 3.4) Pub Date : 2024-01-18 Shaoyu Chen, Qingjie Gong, Peiyu Li, Shengchao Xu, Ningqiang Liu
An empirical equation has been proposed to describe geochemical backgrounds of trace elements during rock weathering on weathering and lithological indices. However, with respect to lithium, the equation was derived on only 9 regolith profiles in China and was not applicable to carbonate-bearing materials with WIG (weathering index of granite) larger than 120. To derive a robust and widely used equation
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Seasonal variations of a glacier river runoff components as relative to changes of air temperature and precipitation in southeast Tibetan Plateau Appl. Geochem. (IF 3.4) Pub Date : 2024-01-18 Ke Wang, Yanlong Kong, Tao Pu, Xiaoyi Shi, Zhonghe Pang
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Rapid and significant perturbations on the global geochemical cycle of rhenium by human activities ----- A case study in Yangtze River basin Appl. Geochem. (IF 3.4) Pub Date : 2024-01-17 Ye Wang, Shilei Li, Pengxiao Xu, Haoxian Wang, Yang Chen, Jun Chen
Rhenium, mostly found in sedimentary organic matter, is used to estimate petrogenic organic carbon (POC) weathering rates. Understanding its cycle on the Earth's surface is key to using riverine dissolved rhenium (Re) as a marker for the weathering of POC. Yet, human interference, especially from the mining, industrial and chemical sectors that commonly use Re, can affect use of this marker. In this
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Trace element geochemistry of high-temperature geothermal waters in the Yunnan-Tibet geothermal province, Southwest China Appl. Geochem. (IF 3.4) Pub Date : 2024-01-17 Jianbo Shang, Mingliang Liu, Yuanyuan Cao, Hongjie Shi, Xing Wei
To investigate the origins of the trace elements and related geochemical processes, seven representative geothermal systems in southern Tibet and one in western Yunnan were selected. The geothermal waters were divided into acidic and neutral-to-alkaline in magmatic geothermal systems and neutral-to-alkaline in non-magmatic geothermal systems. Acidic geothermal waters exhibit low concentrations of most
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Lithium extraction from geothermal brines: Adsorption-desorption studies on 226Ra (228Ra) and 210Pb on lithium-titanium-oxides (LTO) Appl. Geochem. (IF 3.4) Pub Date : 2024-01-17 Lena Kölbel, Laura Herrmann, Thomas Kölbel, Jochen Schneider
Extracting lithium from geothermal brines contributes to meet the growing demand for lithium-ion batteries and other energy applications. Deep geothermal brines of the Upper Rhine Graben (URG) contain up to 200 mg L of lithium and a wide range of dissolved elements, including Th–U series radionuclides. This study presents data from a radiochemical monitoring conducted as part of pilot tests for lithium
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Temperature-dependent adsorption by goethite of molybdate and vanadate Appl. Geochem. (IF 3.4) Pub Date : 2024-01-17 Michael Kersten