Chemical Engineering Journal 336 (2018) 503–509 Contents lists available at ScienceDirect Chemical Engineering Journal journal homepage: www.elsevier.com/locate/cej Hydrothermal conversion of Cs-polluted soil into pollucite for Cs immobilization Yuqian Chen, Zhenzi Jing , Kunchuan Cai, Jian Li Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, School of Materials Science and Engineering, Tongji University, 4800 Cao’an Road, Shanghai 201804, China GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: To deal with the treatment of huge amounts of Cs-polluted soil from the ﬁrst nuclear power plant in Fukushima Hydrothermal synthesis (Japan), a low temperature hydrothermal technology has been developed to convert polluted soil into pollucite Soil for the in-situ immobilization of Cs. The results show that pollucite could be synthesized with a wide range of Cs Immobilization content using a short curing time (2 h) or low curing temperature (160 °C). However, a higher curing tem- Cesium perature or a longer curing time seems to favor the formation of more pollucite. With the addition of Ca(OH) ,a Pollucite tough pollucite body could be synthesized, and the strength enhancement is mainly due to calcium silicate hydrate (C-S-H) formation. This also suggests that the hydrothermal technology has great potential for the
Chemical Engineering Journal – Elsevier
Published: Mar 15, 2018
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