Next Article in Journal
Osteoblast Cell Response on the Ti6Al4V Alloy Heat-Treated
Previous Article in Journal
Strong Photoluminescence Enhancement of Silicon Oxycarbide through Defect Engineering
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Materials 2017, 10(4), 447; doi:10.3390/ma10040447

Cesium and Strontium Retentions Governed by Aluminosilicate Gel in Alkali-Activated Cements

1
Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Korea
2
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 28 March 2017 / Revised: 7 April 2017 / Accepted: 13 April 2017 / Published: 23 April 2017
(This article belongs to the Section Advanced Composites)
View Full-Text   |   Download PDF [2560 KB, uploaded 23 April 2017]   |  

Abstract

The present study investigates the retention mechanisms of cesium and strontium for alkali-activated cements. Retention mechanisms such as adsorption and precipitation were examined in light of chemical interactions. Batch adsorption experiments and multi-technical characterizations by using X-ray diffraction, zeta potential measurements, and the N2 gas adsorption/desorption methods were conducted for this purpose. Strontium was found to crystalize in alkali-activated cements, while no cesium-bearing crystalline phases were detected. The adsorption kinetics of alkali-activated cements having relatively high adsorption capacities were compatible with pseudo-second-order kinetic model, thereby suggesting that it is governed by complex multistep adsorption. The results provide new insight, demonstrating that characteristics of aluminosilicate gel with a highly negatively charged surface and high micropore surface area facilitated more effective immobilization of cesium and strontium in comparison with calcium silicate hydrates. View Full-Text
Keywords: alkali-activated cements; gel; cesium; strontium; adsorption kinetics; immobilization alkali-activated cements; gel; cesium; strontium; adsorption kinetics; immobilization
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Jang, J.G.; Park, S.M.; Lee, H.K. Cesium and Strontium Retentions Governed by Aluminosilicate Gel in Alkali-Activated Cements. Materials 2017, 10, 447.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top