• Je něco špatně v tomto záznamu ?

Confocal micrometer-scale X-ray fluorescence and X-ray absorption fine structure studies of uranium speciation in a tertiary sediment from a waste disposal natural analogue site

MA. Denecke, K. Janssens, K. Proost, J. Rothe, U. Noseck,

. 2005 ; 39 (7) : 2049-2058. [pub] 2005Apr01

Jazyk angličtina Země Spojené státy americké

Typ dokumentu srovnávací studie, časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc20013825

Investigations by micrometer-scale X-ray fluorescence and X-ray absorption fine structure (micro-XRF and micro-XAFS) recorded in a confocal geometry on a bore core section of a uranium-rich tertiary sediment are performed in order to assess mechanisms leading to immobilization of the uranium during diagenesis. Results show uranium to be present as a tetravalent phosphate and that U(IV) is associated with As(V). Arsenic present is either As(V) or As(O); we found no evidence for As(III). The As(O) is observed to be intimately associated with the surface of Fe(II) nodules and likely arsenopyrite. A hypothesis for the mechanism of uranium immobilization is proposed, where arsenopyrite acted as reductant of groundwater-dissolved U(VI), leading to precipitation of less soluble U(IV) and thereby forming As(V).

Citace poskytuje Crossref.org

000      
00000naa a2200000 a 4500
001      
bmc20013825
003      
CZ-PrNML
005      
20200915104408.0
007      
ta
008      
200911s2005 xxu f 000 0|eng||
009      
AR
024    7_
$a 10.1021/es048644k $2 doi
035    __
$a (PubMed)15871236
040    __
$a ABA008 $b cze $d ABA008 $e AACR2
041    0_
$a eng
044    __
$a xxu
100    1_
$a Denecke, Melissa A $u Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany. melissa@ine.fzk.de
245    10
$a Confocal micrometer-scale X-ray fluorescence and X-ray absorption fine structure studies of uranium speciation in a tertiary sediment from a waste disposal natural analogue site / $c MA. Denecke, K. Janssens, K. Proost, J. Rothe, U. Noseck,
520    9_
$a Investigations by micrometer-scale X-ray fluorescence and X-ray absorption fine structure (micro-XRF and micro-XAFS) recorded in a confocal geometry on a bore core section of a uranium-rich tertiary sediment are performed in order to assess mechanisms leading to immobilization of the uranium during diagenesis. Results show uranium to be present as a tetravalent phosphate and that U(IV) is associated with As(V). Arsenic present is either As(V) or As(O); we found no evidence for As(III). The As(O) is observed to be intimately associated with the surface of Fe(II) nodules and likely arsenopyrite. A hypothesis for the mechanism of uranium immobilization is proposed, where arsenopyrite acted as reductant of groundwater-dissolved U(VI), leading to precipitation of less soluble U(IV) and thereby forming As(V).
650    _2
$a absorpční fotometrie $x metody $7 D015502
650    _2
$a arsenikové přípravky $x analýza $x chemie $7 D001152
650    _2
$a geologické sedimenty $x analýza $7 D019015
650    12
$a chemické modely $7 D008956
650    _2
$a radioaktivní odpad $x analýza $7 D011850
650    _2
$a radioaktivní látky znečišťující půdu $x analýza $7 D012990
650    _2
$a spektrometrie rentgenová emisní $x metody $7 D013052
650    _2
$a sloučeniny uranu $x analýza $x chemie $7 D017974
651    _2
$a Česká republika $7 D018153
655    _2
$a srovnávací studie $7 D003160
655    _2
$a časopisecké články $7 D016428
700    1_
$a Janssens, Koen
700    1_
$a Proost, Kristof
700    1_
$a Rothe, Jörg
700    1_
$a Noseck, Ulrich
773    0_
$w MED00001559 $t Environmental science & technology $x 0013-936X $g Roč. 39, č. 7 (2005), s. 2049-2058
856    41
$u https://pubmed.ncbi.nlm.nih.gov/15871236 $y Pubmed
910    __
$a ABA008 $b sig $c sign $y a $z 0
990    __
$a 20200911 $b ABA008
991    __
$a 20200915104404 $b ABA008
999    __
$a ok $b bmc $g 1563271 $s 1103982
BAS    __
$a 3
BAS    __
$a PreBMC
BMC    __
$a 2005 $b 39 $c 7 $d 2049-2058 $e 2005Apr01 $i 0013-936X $m Environmental science & technology $n Environ Sci Technol $x MED00001559
LZP    __
$a Pubmed-20200911

Najít záznam

Citační ukazatele

Možnosti archivace