Fe and As geochemical self-removal dynamics in mineral waters: evidence from the Ferrarelle groundwater system (Riardo Plain, Southern Italy).
Fe and As hydrogeochemistry
Natural mineral water
Natural self-removal dynamics
Oxohydroxides adsorption
Water treatment
Journal
Environmental geochemistry and health
ISSN: 1573-2983
Titre abrégé: Environ Geochem Health
Pays: Netherlands
ID NLM: 8903118
Informations de publication
Date de publication:
Jul 2022
Jul 2022
Historique:
received:
24
09
2020
accepted:
14
03
2021
pubmed:
10
4
2021
medline:
11
6
2022
entrez:
9
4
2021
Statut:
ppublish
Résumé
A theoretical pattern for Fe and As co-precipitation was tested directly in a groundwater natural system. Several monitoring wells were sampled to identify the different endmembers that govern the hydrodynamics of the Ferrarelle Groundwater System in the Riardo Plain (Southern Italy). In agreement with recent investigations, we found a mix of a deep and a shallow component in different proportions, resulting in a specific chemical composition of groundwater in each well depending on the percentages of each component. The shallow component was characterized by EC ~ 430 µS/cm, Eh ~ 300 mV, Fe ~ 0.06 µmol/L and As ~ 0.01-0.12 µmol/L, while the deep component was characterized by EC ~ 3400 µS/cm, Eh ~ 170 mV, Fe ~ 140 µmol/L and As ~ 0.59 µmol/L. A general attenuation of As and Fe concentration that was not due to a simple dilution effect was observed in the mixing process. The oxidation of Fe(II) to Fe(III) produces solid precipitates which adsorb As from solution and then co-precipitate. The reactions pattern of Fe(II) oxidation and As adsorption gave a linear function between [As] and [Fe], where the angular coefficient depends on the [O
Identifiants
pubmed: 33835360
doi: 10.1007/s10653-021-00891-5
pii: 10.1007/s10653-021-00891-5
pmc: PMC9177463
doi:
Substances chimiques
Ferric Compounds
0
Ferrous Compounds
0
Mineral Waters
0
Water Pollutants, Chemical
0
Arsenic
N712M78A8G
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2065-2082Commentaires et corrections
Type : ErratumIn
Informations de copyright
© 2021. The Author(s).
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