Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy (Abstract/Poster in convegno)

Type

• Abstract/Poster in convegno (Classe)
• Prodotto della ricerca (Classe)

Label

• Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy (Abstract/Poster in convegno) (literal)

Anno

• 2012-01-01T00:00:00+01:00 (literal)

Alternative label

• Marafatto, F.F.; Petrini, R.; Pinzino, C.; , Pezzetta, E.; Slejko, F.; Lutman, A. (2012)
  Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy
  in 16th International Conference on Heavy Metals in the Environment, Rome, 23-27 September,2012
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Marafatto, F.F.; Petrini, R.; Pinzino, C.; , Pezzetta, E.; Slejko, F.; Lutman, A. (literal)

Note

• Poster (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• DMG, Università degli Studi di Trieste, Via Weiss 8, I-34128 Trieste (Italy). ICCOM-Pisa, CNR, Area della Ricerca, via G. Moruzzi 1, I-56127 Pisa (Italy). ARPA-FVG, Sezione Laboratorio Unico, via Colugna 42, I-33100 Udine (Italy),. (literal)

Titolo

• Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy (literal)

Abstract

• Hexavalent chromium-contaminated groundwaters and sediments in northern Italy have been studied using the Cr stable-isotope systematics and electron spin resonance spectroscopy (ESR), in order to explore redox changes and soil-groundwater interactions. The isotopic data indicate a possible Cr(VI) source from the oxidation of Cr(III) originated by reduction of Cr(VI) released into the environment from an industrial plant. ESR spectra on the sediments which constitute the aquifers show a broad asymmetric absorption due to coupled Fe(III) and coupled Cr(III) ions and a well resolved hyperfine structure due to manganese ions, resulting from Mn(IV) and Mn(II). The isotopic and ESR data support the hypothesis of Cr(III) being oxidized by Mn oxides which are widespread in the aquifer, possibly related to the oscillation of the phreatic level. The obtained results highlight the usefulness of chromium stable isotopes as environmental tracers and support the observations that naturally occurring Mn oxides in soils may catalize Cr oxidation from the stable Cr(III) form to the toxic Cr(VI) soluble form, yielding valuable information in planning remediation interventions. (literal)

Prodotto di

• Institute of chemistry of organometallic compounds (ICCOM) (Istituto)
• Metodi di risonanza magnetica (PM.P03.015.003) (Modulo)

Autore CNR

• CALOGERO PINZINO (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute of chemistry of organometallic compounds (ICCOM) (Istituto)
• Metodi di risonanza magnetica (PM.P03.015.003) (Modulo)

Autore CNR di

• CALOGERO PINZINO (Unità di personale interno)

Insieme di parole chiave di

• Parole chiave di "Redox reactions and the influence of natural Mn oxides on Cr oxidation in a contaminated site in northern Italy: evidence from Cr stable-isotopes and EPR spectroscopy" (Insieme di parole chiave)