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dc.contributor.author
Sosa, Numa Nahuel
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dc.contributor.author
Kulkarni, Harshad V.
dc.contributor.author
Datta, Saugata
dc.contributor.author
Beilinson, Elisa
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dc.contributor.author
Porfido, Carlo
dc.contributor.author
Spagnuolo, Matteo
dc.contributor.author
Zárate, Marcelo Arístides
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dc.contributor.author
Surber, James
dc.date.available
2020-08-31T19:34:49Z
dc.date.issued
2019-12
dc.identifier.citation
Sosa, Numa Nahuel; Kulkarni, Harshad V.; Datta, Saugata; Beilinson, Elisa; Porfido, Carlo; et al.; Occurrence and distribution of high arsenic in sediments and groundwater of the Claromecó fluvial basin, southern Pampean plain (Argentina); Elsevier; Science of the Total Environment; 695; 133673; 12-2019; 1-13
dc.identifier.issn
0048-9697
dc.identifier.uri
http://hdl.handle.net/11336/112821
dc.description.abstract
Occurrences of high arsenic (As) in sediments and groundwaters were investigated in the Claromecó fluvial basin, southern Pampean plain, Argentina. This investigation includes sedimentology, mineralogy, and hydrogeochemistry of the Neogene and Quaternary aquifers to determine possible sources and transport mechanisms for As in the Claromecó basin. Characterization of the sediments revealed homogeneous mineralogy in both Neogene highlands and Quaternary floodplains with abundant plagioclase, volcanic glass shards (VGS), K-feldspar, quartz, clay minerals and minor concentrations of clinopyroxenes, orthopyroxenes, hornblende, epidote, Fe-(oxy)hydroxides and fluorapatite. The sedimentary As concentrations ranged between 2.8 and 31 mg kg−1 in both aquifers. The average total dissolved As (dissolved AsT) concentrations was 47.2 ± 30.8 μg L−1 (15.3–110 μg L−1) in groundwater in Neogene aquifer (GW1), while it was 97.1 ± 30.6 μg L−1 (45–144 μg L−1) in Quaternary floodplain aquifer (GW2), with all samples exceeding WHO's guideline for dissolved AsT in safe drinking water of 10 μg L−1. Some GW1 (33%) and all GW2 samples contained high levels of fluoride (F−) ranging from 0.6 to 2.6 mg L−1 (1.37 ± 0.59 mg L−1) in GW1 and 2 to 5 mg L−1 (3.2 ± 0.9 mg L−1) in GW2 which also exceeded WHO's guideline for F− in safe drinking water of 1.5 mg L−1. Elevated concentrations of Na+, Cl− and SO4 2− in the Quaternary flood plain groundwater (GW2) could indicated some degree of sea water mixing as well as some contribution from inland processes (e.g. high evapotranspiration rates, long residence time and soil-water interactions). Dissolution of As bearing VGS or Fe-(oxy)hydroxides, alkaline desorption or competitive desorption with HCO3 – from Fe-(oxy)hydroxides appear to be dominating processes of As mobilization, while desorption from fluorapatite elevate dissolved F− levels. This study provides valuable insights on As mobilization processes in Neogene and near coast Quaternary floodplain aquifer.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ARSENIC
dc.subject
HYDROCHEMISTRY
dc.subject
HYDROMORPHIC PALEOSOIL
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QUATERNARY GEOLOGY
dc.subject
SEDIMENTARY GEOCHEMISTRY
dc.subject
SOUTHERN PAMPEAN PLAIN
dc.subject.classification
Geología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Occurrence and distribution of high arsenic in sediments and groundwater of the Claromecó fluvial basin, southern Pampean plain (Argentina)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-05-04T20:52:53Z
dc.journal.volume
695
dc.journal.number
133673
dc.journal.pagination
1-13
dc.journal.pais
Países Bajos
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dc.description.fil
Fil: Sosa, Numa Nahuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Kulkarni, Harshad V.. Kansas State University; Estados Unidos. University Of Texas At San Antonio.; Estados Unidos
dc.description.fil
Fil: Datta, Saugata. Kansas State University; Estados Unidos. University Of Texas At San Antonio.; Estados Unidos
dc.description.fil
Fil: Beilinson, Elisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Porfido, Carlo. Università degli Studi di Bari; Italia
dc.description.fil
Fil: Spagnuolo, Matteo. Università degli Studi di Bari; Italia
dc.description.fil
Fil: Zárate, Marcelo Arístides. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; Argentina
dc.description.fil
Fil: Surber, James. Kansas State University; Estados Unidos
dc.journal.title
Science of the Total Environment
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.scitotenv.2019.133673
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0048969719335995?via%3Dihub
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