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  1. Research article

    A geochemical view into continental palaeotemperatures of the end-Permian using oxygen and hydrogen isotope composition of secondary silica in chert rubble breccia: Kaibab Formation, Grand Canyon (USA)

    The upper carbonate member of the Kaibab Formation in northern Arizona (USA) was subaerially exposed during the end Permian and contains fractured and zoned chert rubble lag deposits typical of karst topograph...

    Ray Kenny

    Geochemical Transactions 2018 19:2

    Published on: 16 January 2018

  2. Research Article

    Chemical speciation and fate of tripolyphosphate after application to a calcareous soil

    Adsorption and precipitation reactions often dictate the availability of phosphorus in soil environments. Tripolyphosphate (TPP) is considered a form of slow release P fertilizer in P limited soils, however, i...

    Jordan G. Hamilton, Jay Grosskleg, David Hilger, Kris Bradshaw, Trevor Carlson, Steven D. Siciliano and Derek Peak

    Geochemical Transactions 2018 19:1

    Published on: 8 January 2018

  3. Research article

    Fe(II) reduction of pyrolusite (β-MnO2) and secondary mineral evolution

    Iron (Fe) and manganese (Mn) are the two most common redox-active elements in the Earth’s crust and are well known to influence mineral formation and dissolution, trace metal sequestration, and contaminant tra...

    Michael V. Schaefer, Robert M. Handler and Michelle M. Scherer

    Geochemical Transactions 2017 18:7

    Published on: 5 December 2017

  4. Research article

    Salinization and arsenic contamination of surface water in southwest Bangladesh

    To identify the causes of salinization and arsenic contamination of surface water on an embanked island (i.e., polder) in the tidal delta plain of SW Bangladesh we collected and analyzed water samples in the d...

    John C. Ayers, Gregory George, David Fry, Laura Benneyworth, Carol Wilson, Leslie Auerbach, Kushal Roy, Md. Rezaul Karim, Farjana Akter and Steven Goodbred

    Geochemical Transactions 2017 18:4

    Published on: 11 September 2017

  5. Research article

    Weakly bound water structure, bond valence saturation and water dynamics at the goethite (100) surface/aqueous interface: ab initio dynamical simulations

    Many important geochemical and biogeochemical reactions occur in the mineral/formation water interface of the highly abundant mineral, goethite [α-Fe(OOH)]. Ab initio molecular dynamics (AIMD) simulations of t...

    Ying Chen, Eric J. Bylaska and John H. Weare

    Geochemical Transactions 2017 18:3

    Published on: 31 March 2017

  6. Research article

    Global hydrogen reservoirs in basement and basins

    Hydrogen is known to occur in the groundwaters of some ancient cratons. Where associated gases have been dated, their age extends up to a billion years, and the hydrogen is assumed also to be very old. These o...

    John Parnell and Nigel Blamey

    Geochemical Transactions 2017 18:2

    Published on: 20 March 2017

  7. Review

    A survey of photogeochemistry

    The participation of sunlight in the natural chemistry of the earth is presented as a unique field of study, from historical observations to prospects for future inquiry. A compilation of known reactions shows...

    Timothy A. Doane

    Geochemical Transactions 2017 18:1

    Published on: 10 February 2017

  8. Research article

    Oxidation of arsenite to arsenate on birnessite in the presence of light

    The effect of simulated solar radiation on the oxidation of arsenite [As(III)] to arsenate [As(V)] on the layered manganese oxide, birnessite, was investigated. Experiments were conducted where birnessite susp...

    Samantha L. Shumlas, Soujanya Singireddy, Akila C. Thenuwara, Nuwan H. Attanayake, Richard J. Reeder and Daniel R. Strongin

    Geochemical Transactions 2016 17:5

    Published on: 6 October 2016

  9. Research article

    Sources of salinity and arsenic in groundwater in southwest Bangladesh

    High salinity and arsenic (As) concentrations in groundwater are widespread problems in the tidal deltaplain of southwest Bangladesh. To identify the sources of dissolved salts and As, groundwater samples from...

    John C. Ayers, Steven Goodbred, Gregory George, David Fry, Laura Benneyworth, George Hornberger, Kushal Roy, Md. Rezaul Karim and Farjana Akter

    Geochemical Transactions 2016 17:4

    Published on: 11 July 2016

  10. Research article

    A study on the dissolution rates of K-Cr(VI)-jarosites: kinetic analysis and implications

    The presence of natural and industrial jarosite type-compounds in the environment could have important implications in the mobility of potentially toxic elements such as lead, mercury, arsenic, chromium, among...

    Iván A. Reyes, Ister Mireles, Francisco Patiño, Thangarasu Pandiyan, Mizraim U. Flores, Elia G. Palacios, Emmanuel J. Gutiérrez and Martín Reyes

    Geochemical Transactions 2016 17:3

    Published on: 13 June 2016

  11. Research article

    Characterization, dissolution and solubility of the hydroxypyromorphite–hydroxyapatite solid solution [(PbxCa1−x)5(PO4)3OH] at 25 °C and pH 2–9

    The interaction between Ca-HAP and Pb2+ solution can result in the formation of a hydroxyapatite–hydroxypyromorphite solid solution [(PbxCa1−x)5(PO4)3(OH)], which can greatly affect the transport and distribution...

    Yinian Zhu, Bin Huang, Zongqiang Zhu, Huili Liu, Yanhua Huang, Xin Zhao and Meina Liang

    Geochemical Transactions 2016 17:2

    Published on: 6 May 2016

  12. Research article

    Interaction mechanisms and kinetics of ferrous ion and hexagonal birnessite in aqueous systems

    In soils and sediments, manganese oxides and oxygen usually participate in the oxidation of ferrous ions. There is limited information concerning the interaction process and mechanisms of ferrous ions and mang...

    Tianyu Gao, Yougang Shen, Zhaoheng Jia, Guohong Qiu, Fan Liu, Yashan Zhang, Xionghan Feng and Chongfa Cai

    Geochemical Transactions 2015 16:16

    Published on: 22 September 2015

  13. Research article

    Mineral precipitation-induced porosity reduction and its effect on transport parameters in diffusion-controlled porous media

    In geochemically perturbed systems where porewater and mineral assemblages are unequilibrated the processes of mineral precipitation and dissolution may change important transport properties such as porosity a...

    Aurélie Chagneau, Francis Claret, Frieder Enzmann, Michael Kersten, Stephanie Heck, Benoît Madé and Thorsten Schäfer

    Geochemical Transactions 2015 16:13

    Published on: 3 September 2015

  14. Research article

    Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms

    Vernadite is a nanocrystalline and turbostratic phyllomanganate which is ubiquitous in the environment. Its layers are built of (MnO6)8− octahedra connected through their edges and frequently contain vacancies an...

    Sylvain Grangeon, Alejandro Fernandez-Martinez, Fabienne Warmont, Alexandre Gloter, Nicolas Marty, Agnieszka Poulain and Bruno Lanson

    Geochemical Transactions 2015 16:12

    Published on: 2 September 2015

  15. Research article

    Aerobic and anaerobic reduction of birnessite by a novel Dietzia strain

    Mn oxides occur in a wide variety of geological settings and exert considerable influences on the components and chemical behaviors of sediments and soils. Microbial reduction of Mn oxides is an important proc...

    Huiqin Zhang, Yan Li, Xin Wang, Anhuai Lu, Hongrui Ding, Cuiping Zeng, Xiao Wang, Xiaolei Wu, Yong Nie and Changqiu Wang

    Geochemical Transactions 2015 16:11

    Published on: 8 August 2015

  16. Research article

    Formation of todorokite from “c-disordered” H+-birnessites: the roles of average manganese oxidation state and interlayer cations

    Todorokite, a 3 × 3 tectomanganate, is one of three main manganese oxide minerals in marine nodules and can be used as an active MnO6 octahedral molecular sieve. The formation of todorokite is closely associated ...

    Huaiyan Zhao, Xinran Liang, Hui Yin, Fan Liu, Wenfeng Tan, Guohong Qiu and Xionghan Feng

    Geochemical Transactions 2015 16:8

    Published on: 15 July 2015

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