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Titolo:
Heavy metal geochemistry of saltmarsh soils from the Ria of Ortigueira (mafic and ultramafic areas, NW Iberian Peninsula)
Autore:
Otero, XL; Huerta-Diaz, MA; Macias, F;
Indirizzi:
Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agricola, Santiago De Compostela 15706, Spain Univ Santiago de Compostela Santiago De Compostela Spain 15706 06, Spain Univ Autonoma Baja California, Inst Invest Oceanol, Ensenada 22830, Baja California, Mexico Univ Autonoma Baja California Ensenada Baja California Mexico 22830 exico
Titolo Testata:
ENVIRONMENTAL POLLUTION
fascicolo: 2, volume: 110, anno: 2000,
pagine: 285 - 296
SICI:
0269-7491(2000)110:2<285:HMGOSS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANOXIC MARINE-SEDIMENTS; TRACE-METALS; ESTUARINE SEDIMENTS; SULFIDE MINERALS; NORTHWEST SPAIN; SALT-MARSH; SPECIATION; IRON; BIOAVAILABILITY; ACCUMULATION;
Keywords:
saltmarsh soils; geochemistry; heavy metals; ultramafic rocks;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Otero, XL Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agricola, Santiago De Compostela 15706, Spain Univ Santiago de Compostela Santiago De Compostela Spain 15706
Citazione:
X.L. Otero et al., "Heavy metal geochemistry of saltmarsh soils from the Ria of Ortigueira (mafic and ultramafic areas, NW Iberian Peninsula)", ENVIR POLLU, 110(2), 2000, pp. 285-296

Abstract

Concentrations of Fe, Mn, Ni, Cu, Cr and Zn in their total, silicate, organic, reactive and pyrite fractions were determined in soils collected from the Ortigueira saltmarshes (Esteiro, Ladrido and Mera, NW Iberian Peninsula), from sediments of the Landoi and Esteiro Rivers, and from sludge generated by a nearby dunite mine. The Esteiro saltmarsh presented clear enrichments of the four metals studied (first 10 cm), especially of Ni and Cr, whoseconcentrations were among the highest. It is proposed that the elevated Crand Ni levels found in the Esteiro saltmarsh were derived from recent contributions of the mine, which are partially discharged into the Landoi River. Total Cu and Zn concentrations were lower than the corresponding ones forCr and Ni. Under suboxic conditions, Ni, Cr, Cu and Zn were mainly associated with the reactive fraction. Under anoxic conditions, Cu and Ni were associated mainly with the pyrite phase. Pyritic Zn and Cr concentrations wererelatively low and similar in all three saltmarshes; however, where anoxic-sulfidic conditions prevailed these two metals were mainly associated withthe reactive and organic fractions. (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 00:41:22