Effect of solution composition on the recrystallization of kaolinite to feldspathoids in hyperalkaline conditions: limitations of pertechnetate incorporation by ion competition effects

Littlewood, Janice L.; Shaw, Samuel; Bots, Pieter; Peacock, Caroline L.; Trivedi, Divyesh; Burke, Ian T.

doi:10.1180/minmag.2015.079.6.13

Cited by 4 publications

(1 citation statement)

References 25 publications

(41 reference statements)

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“…Section 2: Natural Systems Including Biogeochemistry, Biosphere and Geosphere The discussion of natural systems includes a diverse range of papers covering: iodine behaviour in model sediment systems (Guido-Garcia et al, 2015); characterization of the mineralogy and redox reactivity of potential GDF host rocks in the UK (Quirke et al, 2015); modelling studies applying pore network models to Opalinus clay (Xiong and Jivkov et al, 2015); the behaviour of pertechnetate in hyperalkaline conditions in the context of recrystallization of kaolinite (Littlewood et al, 2015); the impact of GDFrelevant temperatures on clay systems in the context of high-level waste disposal (Jobmann and Meleshyn, 2015); the impact of humic substances on metal ion behaviour (Bryan et al, 2015); an evaluation of the Herberts Quarry site in the UK as an analogue for intermediate level waste disposal (Moyce et al, 2015); a study examining the inhibition of colloidal formation in intermediate level waste systems (Felipe-Sotelo et al, 2015); microbial degradation of cellulosic materials under conditions relevant to intermediate level waste disposal (Bassil et al, 2015); microbial degradation of isosaccharinic acid under far-field conditions (Kuippers et al 2015); radiation damage studies in natural sheet silicate minerals (Bower et al, 2015); and a representation of biosphere systems in the UK relevant to higher activity waste disposal (Walke et al, 2015).…”

Section: Section 1: Radionuclide and Gas Behaviourmentioning

confidence: 99%

The IGD-TP Geodisposal 2014: Introduction to the Conference Proceedings

Morris¹,

Bryan²,

Evans³

et al. 2015

Mineral. mag.

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THE 'Implementing Geological Disposal-Technology Platform' (IGD-TP) is composed of European waste-management organizations and has a vision that "by 2025 the first geological disposal facilities for spent fuel, high-level waste and other long-lived radioactive waste will be operating safely in Europe". The first IGD-TP Geodisposal Conference was held at The University of Manchester, UK from June 24 th-26 th 2014 and provided a new forum for researchers in this area to present their work. The Conference brought together >270 delegates from across 23 countries and an important aspect of the conference was to showcase and publish research relevant to geological disposal of radioactive waste. The conference was also an opportunity for more advanced geological programmes to share >30 years of Research and Development and Demonstration (RD & D) and implementation experience in geological disposal with less advanced programmes.

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Section: Section 1: Radionuclide and Gas Behaviourmentioning

confidence: 99%

The IGD-TP Geodisposal 2014: Introduction to the Conference Proceedings

Morris¹,

Bryan²,

Evans³

et al. 2015

Mineral. mag.

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Zeolitization of Sewage Sludge Ash With a Fusion Method

Latosińska¹

2016

J. Ecol. Eng.

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The study shows the results of zeolitization of municipal sewage sludge ash with the indirect fusion method followed by a hydrothermal method. The zeolitization of sewage sludge ash was conducted at the melting temperature of 550 o C and the melting time of 60 minutes, crystallization temperatures of 60 o C and 90 o C, crystallization time of 6 hours and the SSA:NaOH ratio of 1:1.8; 1:1.4. The research of modified sewage sludge ashes included the observation of changes of ash particles surface and the identification of crystalized phases. The zeolitization of sewage sludge ash at the ratio of SSA:NaOH 1.0:1.4 did not cause the formation of zeolite phases. On the other hand, the zeolitization at the ratio of SSA:NaOH 1.0:1.8 resulted in the formation of desired zeolite phases such as zeolite Y (faujasite) and hydroxysodalite. The presented method of sewage sludge ash zeolitization allows to obtain highly usable material. Synthesized zeolites may be used as adsorbents and ion exchangers. They can be potentially used to remove heavy metals as well as ammonia from water and wastewater.

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Mineralogical and Geochemical Constraints of the REE Accumulation in the Almásfüzitő Red Mud Depository in Northwest Hungary

et al. 2019

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Detailed mineralogical and geochemical study of red mud samples from Hungary suggests geological and geochemical processes that determine the spatial distribution of certain elements inside the red mud pitfalls. The major processes are the following: (1) Heavy mineral grains (anatase, rutile, titanomagnetite, etc.) tend to subside due to gravitational differentiation and at present accumulate in the deepest horizons of the pitfalls. (2) Kaolinite reacts to cancrinite under hyperalkaline conditions. (3) Due to diagenetic processes, goethite-cancrinite aggregates form in situ. (4) Light mineral grains (e.g., cancrinite) move upward. (5) Cancrinite transforms to calcite at the shallowest horizons, due probably to the reaction with atmospheric CO2. All these processes have a significant role in accumulation tendencies of different groups of elements inside the pitfalls. The behaviour of chalcophile elements and the HFSE elements follow common geochemical rules and remind features of the host bauxite or even its precursor igneous or metamorphic lithologies. The REEs and Sc are possibly adsorbed on goethite and in the channels of cancrinite. Based on linear mixing model calculations, the major container of these elements is cancrinite. The proportion of the REEs and Sc in the Ti-phases, carbonates, phosphates, zircon, etc. is subordinate relative to the amount accumulated by goethite and cancrinite.

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Effect of solution composition on the recrystallization of kaolinite to feldspathoids in hyperalkaline conditions: limitations of pertechnetate incorporation by ion competition effects

Abstract: Article:Littlewood, JL, Shaw, S, Bots, P et al. containing groundwater and liquors. Kaolinite was aged in NaOH to determine the 22

Cited by 4 publications

References 25 publications

The IGD-TP Geodisposal 2014: Introduction to the Conference Proceedings

The IGD-TP Geodisposal 2014: Introduction to the Conference Proceedings

Zeolitization of Sewage Sludge Ash With a Fusion Method

Mineralogical and Geochemical Constraints of the REE Accumulation in the Almásfüzitő Red Mud Depository in Northwest Hungary

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