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Titolo:
Colloid-borne uranium and other heavy metals in the water of a mine drainage gallery
Autore:
Zanker, H; Richter, W; Brendler, V; Nitsche, H;
Indirizzi:
Forschungszentrum Rossendorf EV, Inst Radiochem, D-01314 Dresden, Germany Forschungszentrum Rossendorf EV Dresden Germany D-01314 Dresden, Germany
Titolo Testata:
RADIOCHIMICA ACTA
fascicolo: 9-11, volume: 88, anno: 2000,
pagine: 619 - 624
SICI:
0033-8230(2000)88:9-11<619:CUAOHM>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
ARSENATE; IRON; FERRIHYDRITE; ADSORPTION; STABILITY;
Keywords:
mine drainage; colloids; uranium; arsenic; lead;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Zanker, H Forschungszentrum Rossendorf EV, Inst Radiochem, Postfach 510119, D-01314 Dresden, Germany Forschungszentrum Rossendorf EV Postfach 510119 Dresden Germany D-01314
Citazione:
H. Zanker et al., "Colloid-borne uranium and other heavy metals in the water of a mine drainage gallery", RADIOCH ACT, 88(9-11), 2000, pp. 619-624

Abstract

The water of a mine drainage gallery was investigated for its contents of colloid-borne heavy metals with emphasis on uranium. About 1 mg/L of colloid particles of 100 to 300nm were found. They consist of a matrix of Fe and Al oxyhydroxides and are formed when anoxic slightly acidic shaft waters mix with oxic near-neutral gallery water. The colloid particles bear toxic trace elements such as As, Pb, and Cu. Almost 100% of the As and Pb and about70% of the Cu contained in the water are colloid-borne. Carbonate complexes prevent the uranyl from being adsorbed on the colloids in the unaltered gallery water. Acidification destroys these complexes: up to 50% of the uranium is attached to the colloids in the slightly acidic pH region. Further acidification converts the uranyl again to a 'non-colloidal' form.

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Documento generato il 21/01/21 alle ore 03:29:40