Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution
This work presents experimental evidence that confirms the potential for two specific zeolites, namely chabazite and faujasite (with a cage size ~2−13 Å), to adsorb small amounts of chloride from a synthetic alkali-activated cement (AAC) pore solution. Four synthetic zeolites were...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-06-01
|
Series: | Materials |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1944/12/12/2019 |
id |
doaj-ebca1e32580a43739383e5827f850a80 |
---|---|
record_format |
Article |
spelling |
doaj-ebca1e32580a43739383e5827f850a802020-11-25T01:09:21ZengMDPI AGMaterials1996-19442019-06-011212201910.3390/ma12122019ma12122019Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore SolutionJorge Osio-Norgaard0Wil V. Srubar1Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, ECOT 441 UCB 428, Boulder, CO 80309-0428, USAMaterials Science and Engineering Program, University of Colorado Boulder, 4001 Discovery Drive, Room N378 80303, Denver CO 80309-0428, USAThis work presents experimental evidence that confirms the potential for two specific zeolites, namely chabazite and faujasite (with a cage size ~2−13 Å), to adsorb small amounts of chloride from a synthetic alkali-activated cement (AAC) pore solution. Four synthetic zeolites were first exposed to a chlorinated AAC pore solution, two faujasite zeolites (i.e., FAU, X-13), chabazite (i.e., SSZ-13), and sodium-stabilized mordenite (i.e., Na-Mordenite). The mineralogy and chemical composition were subsequently investigated via X-ray diffraction (XRD) and both energy- and wavelength-dispersive X-ray spectroscopy (WDS), respectively. Upon exposure to a chlorinated AAC pore solution, FAU and SSZ-13 displayed changes to their diffraction patterns (i.e., peak shifting and broadening), characteristic of ion entrapment within zeolitic aluminosilicate frameworks. Elemental mapping with WDS confirmed the presence of small amounts of elemental chlorine. Results indicate that the chloride-bearing capacity of zeolites is likely dependent on both microstructural features (e.g., cage sizes) and chemical composition.https://www.mdpi.com/1996-1944/12/12/2019alkali-activated cementszeolitefaujasitechabazitechloride adsorption |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jorge Osio-Norgaard Wil V. Srubar |
spellingShingle |
Jorge Osio-Norgaard Wil V. Srubar Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution Materials alkali-activated cements zeolite faujasite chabazite chloride adsorption |
author_facet |
Jorge Osio-Norgaard Wil V. Srubar |
author_sort |
Jorge Osio-Norgaard |
title |
Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution |
title_short |
Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution |
title_full |
Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution |
title_fullStr |
Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution |
title_full_unstemmed |
Zeolite Adsorption of Chloride from a Synthetic Alkali-Activated Cement Pore Solution |
title_sort |
zeolite adsorption of chloride from a synthetic alkali-activated cement pore solution |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-06-01 |
description |
This work presents experimental evidence that confirms the potential for two specific zeolites, namely chabazite and faujasite (with a cage size ~2−13 Å), to adsorb small amounts of chloride from a synthetic alkali-activated cement (AAC) pore solution. Four synthetic zeolites were first exposed to a chlorinated AAC pore solution, two faujasite zeolites (i.e., FAU, X-13), chabazite (i.e., SSZ-13), and sodium-stabilized mordenite (i.e., Na-Mordenite). The mineralogy and chemical composition were subsequently investigated via X-ray diffraction (XRD) and both energy- and wavelength-dispersive X-ray spectroscopy (WDS), respectively. Upon exposure to a chlorinated AAC pore solution, FAU and SSZ-13 displayed changes to their diffraction patterns (i.e., peak shifting and broadening), characteristic of ion entrapment within zeolitic aluminosilicate frameworks. Elemental mapping with WDS confirmed the presence of small amounts of elemental chlorine. Results indicate that the chloride-bearing capacity of zeolites is likely dependent on both microstructural features (e.g., cage sizes) and chemical composition. |
topic |
alkali-activated cements zeolite faujasite chabazite chloride adsorption |
url |
https://www.mdpi.com/1996-1944/12/12/2019 |
work_keys_str_mv |
AT jorgeosionorgaard zeoliteadsorptionofchloridefromasyntheticalkaliactivatedcementporesolution AT wilvsrubar zeoliteadsorptionofchloridefromasyntheticalkaliactivatedcementporesolution |
_version_ |
1725179478887366656 |