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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Baldermann, Andre
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Novel green technology for wastewater treatmentcitations
- 2022Solubility of C-A-S-H phases with high degree of heavy metal ion substitutioncitations
- 2022Microstructure Development in Artificially Cemented, Fine-Grained Soilscitations
- 2021A novel nZVI–bentonite nanocomposite to remove trichloroethene (TCE) from solutioncitations
- 2021Quantitative assessment of microstructural changes of hydrated cement blends due to leaching and carbonation, based on statistical analysis of image datacitations
- 2019Hydration processes of accelerated cementitious systems governing early strength development
- 2019Sulfate resistance of dry mix shotcretes with new binder composition
- 2019Mineralogical and microstructural response of hydrated cement blends to leachingcitations
- 2018Effect of aqueous Si/Mg ratio and pH on the nucleation and growth of sepiolite at 25 °Ccitations
- 2017Environmental controls and reaction pathways of coupled de-dolomitization and thaumasite formationcitations
- 2016Concrete corrosion in an Austrian sewer system
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article
Solubility of C-A-S-H phases with high degree of heavy metal ion substitution
Abstract
<p>Knowledge about interactions between cementitious materials and dissolved metal (Me) ions is key for environmental remediation and waste management, but thermodynamic data on this topic are still limited. We present solubility data for nanocrystalline C-A-S-H phases substituted by distinct Me ions with (Ca + Me)/(Si + Al) molar ratios from 0.86 to 1.04 and Ca<sup>2+</sup> substitution of ∼ 48 mol% for Zn<sup>2+</sup>, ∼29 mol% for Co<sup>2+</sup> and ∼ 27 mol% for Cu<sup>2+</sup> in tobermorite-type Me-C-A-S-H. The solubility constants of the Me-C-A-S-H phases are significantly lower compared to pure C-A-S-H (logK = -8.3), ranging from logK = -8.6 to −11.3 for Co-C-A-S-H, logK = -9.1 to −11.6 for Cu-C-A-S-H and logK = -8.9 to −14.1 for Zn-C-A-S-H, as the Me content increases according to the expression: logK<sub>Me-C-A-S-H</sub>=0.11±0.03·%Me<sub>substitution</sub>-8.33±0.12;R<sup>2</sup>=0.89 independent on the type of incorporated Me ion. Thus, newly-forming C-A-S-H phases have a high immobilization potential for aqueous Me ions. The novel solubility data open the door for thermodynamic modelling of Me ion mobility in aquatic media.</p>