Speciation of cadmium in cement - Part II. C<sub>3</sub>S hydration with Cd <sup>2+</sup> solution: Fid-Bau Portal

Fachinformationsdienst BAUdigital

A platform for research: civil engineering, architecture and urbanism

Speciation of cadmium in cement - Part II. C₃S hydration with Cd ²⁺ solution

Pomies, M.P. / Lequeux, N. / Boch, P.

C₃S was hydrated with Cd-containing solutions to prepare suspensions (water/solid (w/s) ratio = 100) and pastes (w/s = 0.45). XRD, EXAFS, and ¹¹³Cd-NMR experiments show that the immobilization of Cd depends on Cd concentration and water/cement ratio. For pastes, there is formation of a mixed Ca/Cd hydroxide, but a fraction of Cd ions is probably sorbed on the C-S-H. In suspensions with large Cd content, there is precipitation of Cd(OH)₂; in suspensions with low Cd contents, Cd(OH)₂ is not detected, which supports the hypothesis that Cd is sorbed on C-S-H.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Speciation of cadmium in cement - Part II. C₃S hydration with Cd ²⁺ solution

Pomies, M.P. / Lequeux, N. / Boch, P.

C₃S was hydrated with Cd-containing solutions to prepare suspensions (water/solid (w/s) ratio = 100) and pastes (w/s = 0.45). XRD, EXAFS, and ¹¹³Cd-NMR experiments show that the immobilization of Cd depends on Cd concentration and water/cement ratio. For pastes, there is formation of a mixed Ca/Cd hydroxide, but a fraction of Cd ions is probably sorbed on the C-S-H. In suspensions with large Cd content, there is precipitation of Cd(OH)₂; in suspensions with low Cd contents, Cd(OH)₂ is not detected, which supports the hypothesis that Cd is sorbed on C-S-H.

Speciation of cadmium in cement - Part II. C₃S hydration with Cd ²⁺ solution

Pomies, M.P. / Lequeux, N. / Boch, P.

C₃S was hydrated with Cd-containing solutions to prepare suspensions (water/solid (w/s) ratio = 100) and pastes (w/s = 0.45). XRD, EXAFS, and ¹¹³Cd-NMR experiments show that the immobilization of Cd depends on Cd concentration and water/cement ratio. For pastes, there is formation of a mixed Ca/Cd hydroxide, but a fraction of Cd ions is probably sorbed on the C-S-H. In suspensions with large Cd content, there is precipitation of Cd(OH)₂; in suspensions with low Cd contents, Cd(OH)₂ is not detected, which supports the hypothesis that Cd is sorbed on C-S-H.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Document information

Title:

Speciation of cadmium in cement - Part II. C₃S hydration with Cd ²⁺ solution

Contributors:

Pomies, M.P. (author) / Lequeux, N. (author) / Boch, P. (author)

Published in:

Cement and Concrete Research ; 31 ; 571-576

Publication date:

2001

Size:

6 Seiten, 17 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(00)00477-4

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Cadmiumion , Hydratisieren , Adsorption , Röntgenbeugung , Röntgenanalyse , Kernresonanzspektrometrie , Industrieabfall , Abfallbeseitigen , chemische Fällung , Suspension , Abfallwirtschaft , Wasser-Zement-Wert , Tricalciumsilicat

Similar titles

Speciation of cadmium in cement - Part II. C3S hydration with Cd2+ solution

Pomiès, Marie-Pierre | Online Contents | 2001

Speciation of cadmium in cement

Pomies, M. P. / Lequeux, N. / Boch, P. | British Library Online Contents | 2001

Speciation of cadmium in cement

Pomies, M. P. / Lequeux, N. / Boch, P. | British Library Online Contents | 2001

Speciation of cadmium in cement - Part I. Cd²⁺ uptake by C-S-H

Pomies, M.P. / Lequeux, N. / Boch, P. | Tema Archive | 2001

Speciation of cadmium in cement - Part I. Cd2+ uptake by C-S-H

Pomiès, Marie-Pierre | Online Contents | 2001