International Journal for chemical aspects of nuclear science and technology
Ed. by Qaim, Syed M.
IMPACT FACTOR increased in 2015: 1.100
5-year IMPACT FACTOR: 1.229
Rank 15 out of 32 in category Nuclear Science & Technology in the 2015 Thomson Reuters Journal Citation Report/Science Edition
SCImago Journal Rank (SJR) 2015: 0.470
Source Normalized Impact per Paper (SNIP) 2015: 0.708
Impact per Publication (IPP) 2015: 1.048
Pertechnetate immobilization with amorphous iron sulfide
1 University of Missouri-Columbia, Department of Chemistry, Columbia, U.S.A.
2 Illinois Institute of Technology, Department of Biological, Chemical, and Physical S, Chicago, U.S.A.
Citation Information: Radiochimica Acta. Volume 96, Issue 12, Pages 823–833, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract.2008.1528, September 2009
- Published Online:
The reduction of pertechnetate (TcO4−) with freshly prepared amorphous iron sulfide was investigated. The amorphous iron sulfide (FeS) was shown to have an elemental composition of FeS0.97 for all of the size fractions and a point of zero charge of pHpzc=7.4. Solubility studies of FeS in various buffers indicated that in the pH range 6.1–9.0, the concentrations of dissociated Fe2+ and S2− were negligible. The reductive immobilization of TcO4− with FeS was shown to be accelerated by increasing ionic strength and strongly pH dependent. At pH values below the pHpzc, the positively charged FeS surface reacted much faster with TcO4− and had higher immobilization yields relative to the negatively charged FeS surface at pH values above pHpzc. The TcO4−−FeS reaction is consistent with a surface mediated reaction through ligand exchange. The TcO4−−FeS reductive immobilization reaction product was characterized by X-ray absorption near edge spectroscopy (XANES), extended X-ray absorption fine structure (EXAFS), Fourier transform infrared spectroscopy (FT-IR), and energy dispersive X-ray spectroscopy (EDS) and found to be predominantly TcO2. Studies on the reductive capacity of the FeS and the long term stability of the TcO4−−FeS reaction product under both anaerobic and aerobic environments shows the potential utility of the in situ gaseous (hydrogen sulfide gas) immobilization technology in solidification of TcO4− by creating a FeS permeable reaction barrier in the vadose zone.
Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.