The role of Fe on the formation and diagenesis of interstratified glauconite-smectite and illite-smectite: A case study of Upper Cretaceous shallow-water carbonates

Baldermann, Andre; Dietzel, Martin; Mavromatis, Vasileios; Mittermayr, Florian; Warr, Laurence N.; Wemmer, Klaus

doi:10.1016/j.chemgeo.2017.02.008

Cited by 54 publications

(35 citation statements)

References 58 publications

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“…The TEM-EDX spectra were acquired using a counting time of 30 s to reduce element migration and element loss. The accuracy of the EDX results was verified by replicate measurements performed on a suite of phyllosilicate standards [26][27][28]. The analytical error was determined to be ± 2 at.% for Si and Al analyses.…”

Section: Solid-phase Characterizationmentioning

confidence: 85%

Removal of Barium, Cobalt, Strontium, and Zinc from Solution by Natural and Synthetic Allophane Adsorbents

et al. 2018

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Abstract:The capacity and mechanism of the adsorption of aqueous barium (Ba), cobalt (Co), strontium (Sr), and zinc (Zn) by Ecuadorian (NatAllo) and synthetic (SynAllo-1 and SynAllo-2) allophanes were studied as a function of contact time, pH, and metal ion concentration using kinetic and equilibrium experiments. The mineralogy, nano-structure, and chemical composition of the allophanes were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and specific surface area analyses. The evolution of adsorption fitted to a pseudo-first-order reaction kinetics, where equilibrium between aqueous metal ions and allophane was reached within <10 min. The metal ion removal efficiencies varied from 0.7 to 99.7% at pH 4.0 to 8.5. At equilibrium, the adsorption behavior is better described by the Langmuir model than by the Dubinin-Radushkevich model, yielding sorption capacities of 10.6, 17.2, and 38.6 mg/g for Ba 2+ , 12.4, 19.3, and 29.0 mg/g for HCoO − 2 ; 7.2, 15.9, and 34.4 mg/g for Sr 2+ ; and 20.9, 26.9, and 36.9 mg/g for Zn 2+ , by NatAllo, SynAllo-2, and SynAllo-1, respectively. The uptake mechanism is based on a physical adsorption process rather than chemical ion exchange. Allophane holds great potential to effectively remove aqueous metal ions over a wide pH range and could be used instead of other commercially available sorbent materials such as zeolites, montmorillonite, carbonates, and phosphates for special wastewater treatment applications.

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Section: Solid-phase Characterizationmentioning

confidence: 85%

Removal of Barium, Cobalt, Strontium, and Zinc from Solution by Natural and Synthetic Allophane Adsorbents

et al. 2018

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“…The solids recovered at the end of the experiments were substantially altered relative to the starting materials. The SEM images of reacted basalt from the 250 °C experiments show that the initially clean and relatively smooth grain surfaces were completely covered by micrometre-scale, honeycomb-like structures typical for neo-formed smectite (e.g., Fiore et al, 2001;Baldermann et al, 2012;Baldermann et al, 2017). While the alteration features observed for the 290 °C experiments are very similar, the clayey textures seem to be more regular for both crystalline basalt experiments ( Fig.…”

Section: Solid Alteration Productsmentioning

confidence: 99%

“…The rapid formation of saponite is consistent with the saturation indices for Mg-saponite calculated with PHREEQC, which indicate that the reactive liquid is extremely oversaturated with respect to this phase (Supplementary Fig Sodium, Cl and K are not significantly incorporated into alteration phases, with the latter being progressively enriched in the fluid. In contrast, Si and Fe released by basalt dissolution were likely scavenged by authigenic (ferrous) clay minerals (Baldermann et al, 2014;Baldermann et al, 2015;Baldermann et al, 2017) and/or in the case of Si precipitated on minor amounts of pre-existing quartz which was potentially introduced while grinding the basalt (indicated by XRD spectra; Supplementary Fig. 1) at least during the initial stage of seawater-basalt interaction ( Supplementary Fig.…”

Section: Chemical Exchangementioning

confidence: 99%

Stable and radiogenic strontium isotope fractionation during hydrothermal seawater-basalt interaction

Voigt

Pearce

Baldermann

et al. 2018

Geochimica et Cosmochimica Acta

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The fluid-rock interactions occurring in hydrothermal systems at or near mid-oceanic ridges (MOR) were studied experimentally by reacting crystalline and glassy basalt with seawater at 250 and 290 °C while monitoring the fluid phase Sr isotopic evolution (87 Sr/ 86 Sr and δ 88/86 Sr). The results indicate that seawater Sr was incorporated into anhydrite during the early stages of seawater-basalt interaction. Fluid 87 Sr/ 86 Sr values trend towards the basaltic signature as non-stoichiometric basalt dissolution became the dominant process. This suggests that the interplay between fast Sr incorporation into secondary sulfates versus slow and continuous Sr liberation due to basalt dissolution at intermediate temperatures could partly explain previously identified discrepancies between MOR heat budget constraints and the marine 87 Sr/ 86 Sr budget. Late-stage anhydrite re-dissolution, likely caused by the fluid phase becoming more reducing through further basalt dissolution, as well as by quenching of the 2 experiments, represents a potential explanation for the low amounts of anhydrite found in naturally altered oceanic basalt samples. Relatively strong decreases in fluid δ 88/86 Sr values in experiments with crystalline basalt suggest that isotopically light Sr was preferentially released due to non-stoichiometric dissolution. A slight preference of anhydrite for isotopically heavy Sr (Anhydrite−Liquid 88/86 = 0.33 ± 0.020 ‰) is indicated by the data, suggesting that changes in MOR spreading rates and Sr removal could be recorded in the isotope compositions of authigenic, sedimentary Sr phases. Such insights will help to constrain the influence of hydrothermal systems on the oceanic stable Sr cycle.

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“…In this study, for the first time, we investigated glauconite as an inhibitor for urea release. Glauconite is potassium phyllosilicate (clay mineral) with a dioctahedral structure [29][30][31][32] distributed in ancient marine sediments [33][34][35][36][37][38]. Due to the high content of K 2 O (up to 8-9%), glauconite can serve as an independent unconventional potash fertilizer [39][40][41][42][43][44][45] that has a prolonged effect [46].…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

et al. 2019

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We investigated the mechanochemical synthesis of complex slow release fertilizers (SRF) derived from glauconite. We studied the effectiveness of the mechanical intercalation of urea into glauconite using planetary and ring mills. The potassium-nitric complex SRFs were synthesized via a mechanochemical method mixing glauconite with urea in a 3:1 ratio. The obtained composites were analyzed using X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence analysis, and infrared spectroscopy. The results show that as duration of mechanochemical activation increases, the mineralogical, chemical, and structural characteristics of composites change. Essential modifications associated with a decrease in absorbed urea and the formation of microcrystallites were observed when the planetary milling time increased from 5 to 10 min and the ring milling from 15 to 30 min. Complete intercalation of urea into glauconite was achieved by 20 min grinding in a planetary mill or 60 min in a ring mill. Urea intercalation in glauconite occurs much faster when using a planetary mill compared to a ring mill.

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The role of Fe on the formation and diagenesis of interstratified glauconite-smectite and illite-smectite: A case study of Upper Cretaceous shallow-water carbonates

Cited by 54 publications

References 58 publications

Removal of Barium, Cobalt, Strontium, and Zinc from Solution by Natural and Synthetic Allophane Adsorbents

Removal of Barium, Cobalt, Strontium, and Zinc from Solution by Natural and Synthetic Allophane Adsorbents

Stable and radiogenic strontium isotope fractionation during hydrothermal seawater-basalt interaction

Mechanochemical Preparation of Slow Release Fertilizer Based on Glauconite–Urea Complexes

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