Far from equilibrium basaltic glass alteration: The influence of Fe redox state and thermal history on element mobilization

Stranghoener, Marius; Dultz, Stefan; Behrens, Harald; Schippers, Axel

doi:10.1016/j.gca.2020.01.005

Cited by 5 publications

(5 citation statements)

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“…The authors explain their findings with the different roles of Fe(II) (as network modifier) and Fe(III) (as network former) within silicate glass, where SiO 4 tetrahedra are linked by T-O-Si bonds (T = Al, Fe(III)). During the dissolution of oxidized silicate glass, Fe(III)-O-Si bonds seem to be more vulnerable to protonation, breakage and the subsequent formation of non-bridging Si-OH bonds, when compared to Al-O-Si bonds [40]. The high contents of Al 2 O 3 and Fe 2 O 3 and structural similarity of vitreous stone wool with basaltic silicate glass, may suggest similar mechanisms for the test materials of this study.…”

Section: Discussionmentioning

confidence: 60%

“…Additionally, the heat treatment, which was used to remove the organic constituents (binder and mineral oil) from the fibrous (#1) and one of the milled samples (#2), may also lead to alterations in the elution behavior by oxidizing Fe(II) to Fe(III) within the stone wool. Stranghoener et al [40] have reported differences in the release of metals from vitreous basaltic silicate glass, depending on the thermal history of the glasses and Fe redox state within the material. The authors explain their findings with the different roles of Fe(II) (as network modifier) and Fe(III) (as network former) within silicate glass, where SiO 4 tetrahedra are linked by T-O-Si bonds (T = Al, Fe(III)).…”

Section: Discussionmentioning

confidence: 99%

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Assessment of acute and chronic ecotoxicological effects of aqueous eluates of stone wool insulation materials

et al. 2023

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Background Stone wool is an inorganic mineral insulation material increasingly used to reduce the climate impact of buildings. The acute and chronic ecotoxicological potential of stone wool eluates have been studied in a battery of standardized laboratory ecotoxicological tests. The experiments were conducted with stone wool test materials in fibrous and milled form, with and without the presence of organic binder. For the preparation of eluates, the OECD protocol on the transformation/dissolution of metals and metal compounds was applied. The resulting eluates were used in acute tests, i.e., bioluminescence test with Aliivibrio fischeri (DIN EN ISO 11348-1:2009), algae growth test with Desmodesmus subspicatus (OECD No. 201) and immobilization test with Daphnia magna (OECD No. 202), as well as chronic tests, i.e., the Daphnia magna reproduction test (OECD No. 211) and the nematode growth and reproduction test with Caenorhabditis elegans (ISO 10872:2010). Results While no acute or chronic ecotoxicological effects of the eluates were observed for fibrous stone wool material, the milled test materials showed some chronic effects on aquatic invertebrates. Depending on the test materials and concentrations of milled stone wool used in the eluate preparation, these chronic effects included significant stimulation or inhibition of daphnid reproduction and nematode growth. The chemical analysis conducted in parallel to the ecotoxicological assessment indicated no leaching of organic substances from the applied binder or mineral oils and no formation of nanoparticles by the milling of stone wool. Furthermore, ICP-MS and ICP-OES analysis of eighteen elements revealed that only aluminum and nickel could be quantified in the eluates, at concentrations of approximately 750 µg/L and 7 µg/L, respectively. Conclusions Based on the present ecotoxicological assessment, eluates from stone wool fibers cannot be considered as chemically hazardous to the aquatic environment. However, additional investigations of the ecotoxicological potential of the milled material and the environmental exposure of stone wool products are necessary for a complete evaluation of potentially negative effects of stone wool insulation materials.

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Section: Discussionmentioning

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Assessment of acute and chronic ecotoxicological effects of aqueous eluates of stone wool insulation materials

et al. 2023

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“…Both composition and Fe redox ratios can influence the release of elements into solution 57,58 . The normalized fraction of NBOs (NBO/ T , Table 4) assumes that Fe oxidation state influences the degree of network connectivity, which in turn might correlate with the chemical durability (NBO/ T is a function of both Fe oxidation state and composition).…”

Section: Discussionmentioning

confidence: 99%

“…Both composition and Fe redox ratios can influence the release of elements into solution. 57,58 The normalized fraction of NBOs (NBO/T, Table 4) assumes that Fe oxidation state influences the degree of network connectivity, which in turn might correlate with the chemical durability (NBO/T is a function of both Fe oxidation state and composition). In this study, it was found that the three synthetic glasses have chemical durability values within experimental uncertainty of one another (±20% at 1σ, see Figure 10).…”

Section: Influence Of Non-bridging Oxygens On Chemical Durabilitymentioning

confidence: 99%

Effect of network connectivity on behavior of synthetic Broborg hillfort glasses

et al. 2022

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There is wide industrial interest in developing robust models of long-term (>100 years) glass durability. Archeological glass analogs, glasses of similar composition, and alteration conditions to those being tested for durability can be used to evaluate and inform such models. Two such analog glasses from a 1500-This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…7–13 Despite this, the papers 1–3 attempted to find differences in the in vitro acellular behaviour of fibres with and without binder, using binder removal techniques that modify fibre chemistry, 14,15 wettability and thus likely solubility. 16,17 The paper 1 explored the distribution of binder (presumably phenol-urea-formaldehyde, PUF) on stone wool fibres and tried to find a correlation between dissolution rate of stone wool measured in a simulated lung fluid (phagolysosomal simulant fluid, PSF) and the amount and thickness of organic material on the fibre surface. The article 1 reports the use of surface sensitive techniques, such as X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) mapping and modelled XPS data with QUASES software.…”

Section: Introductionmentioning

confidence: 99%

Comment on “Which fraction of stone wool fibre surface remains uncoated by binder? A detailed analysis by time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy” by Hirth et al., 2021, RSC Adv., 11, 39545, DOI: 10.1039/d1ra06251d

et al. 2023

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Far from equilibrium basaltic glass alteration: The influence of Fe redox state and thermal history on element mobilization

Cited by 5 publications

References 50 publications

Assessment of acute and chronic ecotoxicological effects of aqueous eluates of stone wool insulation materials

Assessment of acute and chronic ecotoxicological effects of aqueous eluates of stone wool insulation materials

Effect of network connectivity on behavior of synthetic Broborg hillfort glasses

Comment on “Which fraction of stone wool fibre surface remains uncoated by binder? A detailed analysis by time-of-flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy” by Hirth et al., 2021, RSC Adv., 11, 39545, DOI: 10.1039/d1ra06251d

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