Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Chemical speciation analysis of I-129 in seawater and a preliminary investigation to use it as a tracer for geochemical cycle study of stable iodine
Autore:
Hou, XL; Dahlgaard, H; Nielsen, SP;
Indirizzi:
Riso Natl Lab, DK-4000 Roskilde, Denmark Riso Natl Lab Roskilde Denmark DK-4000 tl Lab, DK-4000 Roskilde, Denmark
Titolo Testata:
MARINE CHEMISTRY
fascicolo: 2-3, volume: 74, anno: 2001,
pagine: 145 - 155
SICI:
0304-4203(200105)74:2-3<145:CSAOII>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRON-ACTIVATION ANALYSIS; WATERS; TRANSPORT; SEAWEED; SEA;
Keywords:
iodine-129; seawater; chemical species; geochemical cycle of iodine; ion-exchange separation; neutron activation analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Hou, XL Riso Natl Lab, NUK-202,POB 49, DK-4000 Roskilde, Denmark Riso NatlLab NUK-202,POB 49 Roskilde Denmark DK-4000 de, Denmark
Citazione:
X.L. Hou et al., "Chemical speciation analysis of I-129 in seawater and a preliminary investigation to use it as a tracer for geochemical cycle study of stable iodine", MAR CHEM, 74(2-3), 2001, pp. 145-155

Abstract

A method was developed for the determination of the I-129 and I-127 in iodide and iodate species in seawater. Iodide and iodate were first separated by anion exchange method from seawater; the separated fractions of various chemical species of iodine were further concentrated by solvent extraction and then converted to LiI irradiation target. The concentrations of I-129 and I-127 in various fractions were determined by neutron activation analysis using nuclear reactions of I-129 (n, gamma)I-130 and I-127(n, gamma) I-128, respectively. Surface and bottom seawater samples from three locations in the Kattegat and Baltic Sea were analyzed for I-129 and I-127 in both iodide and iodate species and total inorganic iodine. Levels as low as 2.3 X 10(-15) M I-129 and 7 nM I-127 were measured. The possibility of using this method to study the geochemical cycle of iodine in the ocean was investigated. The preliminary results indicate that this is possible, and that this method can be also used for the investigation of the transport, dispersion and mixture of water masses by using I-129 discharged from reprocessing facilities as a tracer. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 08:34:11