Desorption of cesium from granite under various aqueous conditions

NCUIR > College of Earth Sciences > Graduate Institute of Hydrological and Oceanic Sciences > journal & Dissertation > Item 987654321/50475

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50475

Title:	Desorption of cesium from granite under various aqueous conditions
Authors:	Wang,TH;Li,MH;Wei,YY;Teng,SP
Contributors:	水文與海洋科學研究所
Keywords:	SEQUENTIAL EXTRACTION PROCEDURE;SUBSURFACE SEDIMENTS;HANFORD SITE;SORPTION;SOILS;ADSORPTION;MINERALS;CS-137;USA;SPECIATION
Date:	2010
Issue Date:	2012-03-27 17:32:59 (UTC+8)
Publisher:	國立中央大學
Abstract:	In this work the desorption of cesium ions from crushed granite in synthetic groundwater (GW) and seawater (SW) was investigated. Results were compared with those obtained in deionized water (DW) and in two kinds of extraction solutions, namely: MgCl(2) and NaOAc (sodium acetate). In general, the desorption rate of Cs from crushed granite increased proportionally with initial Cs loadings. Also, amounts of desorbed Cs ions followed the tendency in the order SW > GW > NaOAc approximate to MgCl(2) > DW solutions. This indicated that the utilization of extraction reagents for ion exchange will underestimate the Cs desorption behavior. Fitting these experimental data by Langmuir model showed that these extraction reagents have reduced Cs uptake by more than 90%, while only less than 1% of adsorbed Cs ions are still observed in GW and SW solutions in comparison to those in DW. Further SEM/EDS mapping studies clearly demonstrate that these remaining adsorbed Cs ions are at the fracture areas of biotite. (C) 2010 Elsevier Ltd. All rights reserved.
Relation:	APPLIED RADIATION AND ISOTOPES
Appears in Collections:	[Graduate Institute of Hydrological and Oceanic Sciences] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	612	View/Open

社群 sharing

Loading...