Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Bioaccumulation of heavy metals in thionic fluvisols by a marine polychaete: The role of metal sulfides
Autore:
Otero, XL; Sanchez, JM; Macias, F;
Indirizzi:
Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agr, Santiago De Compostela 15706, Spain Univ Santiago de Compostela Santiago De Compostela Spain 15706 06, Spain Univ Vigo, Escola IT Forestal, Dep Inxeneria Recursos Nat & Medio Ambiente, Pontevedra 36005, Spain Univ Vigo Pontevedra Spain 36005 Medio Ambiente, Pontevedra 36005, Spain
Titolo Testata:
JOURNAL OF ENVIRONMENTAL QUALITY
fascicolo: 4, volume: 29, anno: 2000,
pagine: 1133 - 1141
SICI:
0047-2425(200007/08)29:4<1133:BOHMIT>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACID VOLATILE SULFIDE; FRESH-WATER SEDIMENTS; SALT-MARSH SEDIMENTS; TRACE-METALS; NORTHWEST SPAIN; ESTUARINE SEDIMENTS; BIOAVAILABILITY; ACCUMULATION; SPECIATION; TOXICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Otero, XL Univ Santiago de Compostela, Fac Biol, Dep Edafol & Quim Agr, Santiago De Compostela 15706, Spain Univ Santiago de Compostela Santiago De Compostela Spain 15706
Citazione:
X.L. Otero et al., "Bioaccumulation of heavy metals in thionic fluvisols by a marine polychaete: The role of metal sulfides", J ENVIR Q, 29(4), 2000, pp. 1133-1141

Abstract

Bioavailable heavy metals have been widely studied in recent years becauseof their toxicity to natural ecosystems. Despite the number of studies tarried out, relatively little is known about the metal fraction that is biologically available. In this study, we analyzed seasonal concentrations of acid-volatile sulfide (AVS) as well as heavy metals associated with the reactive (soluble in 1 M HCI) and pyrite (soluble in HNO3) fractions of the soils of three salt marshes in the ria of Ortigueira (NW Iberian Peninsula). Heavy metal concentrations in polychaete worms (Nereis diversicolor) collected from each salt marsh were also determined and compared with metal contents in the different fractions of the soil. We did not find a relationship between the concentration of total metal or metal incorporated into the reactive fraction in the soil and the tissue-metal concentration in N. diversicolor. The results appear to indicate that this species preferentially accumulates metals associated with reduced forms of sulfur (pyrite and presumablyAVS). Oxidation of these metal sulfides would lead to release of Cu and Niinto interstitial water and they would then be readily available to be taken up by these organisms, either by absorption through the body surface or across the digestive tract.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 23:03:44