Influence of regional hydrogeological systems at a local scale: analyzing the coupled effects of hydrochemistry and biological activity in a Fe and CO2 rich spring
dc.contributor.author
dc.date.accessioned
2016-11-15T13:15:09Z
dc.date.available
2016-11-15T13:15:09Z
dc.date.issued
2016-11-01
dc.identifier.issn
0048-9697
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dc.description.abstract
A multidisciplinary approach was used in this study to determine the origin of a Fe and CO2 rich spring, an extreme freshwater system and to evaluate the coupled effects of hydrochemistry and biological activity at a local scale. An electrical resistivity tomography survey was conducted to delineate the geological context in which water emerges from a Plio-Quaternary supracrustal fault zone, and a bulk resistivity decrease was detected when CO2 rich groundwater occurred. Nine water samples, together with eight biofilm samples, and three sediment samples were taken along the spring canal for their analysis. Major ions, nutrients, and metals were analysed in water samples. Sediment analyses determined the main solid phases precipitated (mainly as CaCO3 and Fe(OH)3(a)). Biofilm analyses permitted to obtain biovolume per cell measures, total biovolume values, diatom density, chlorophyll a concentrations, and the Margalef Index values. Inverse modeling and batch reaction models were used to determine the physicochemical processes affecting the spring water, obtaining the total amount of CaCO3/L formed; the Fe and Mn compounds, which mainly precipitated as Fe(OH)3(a) and Mn(OH)2; as well as the total CO2 released to the atmosphere. Analyzing these results together with the patterns of variation of hydrochemical and biological parameters, different interactions were observed: a) the effects of Fe inhibition in travertine formation, even though when the highest CO2 release was occurring; b) the fate and effects of chemicals limiting and/or inhibiting algal growth (mainly Fe, As and phosphate); c) the lack of coincidence between algal growth and tufa limestone precipitation; d) the relationship between some divalent metals (Mn and Co) and biotic activity
dc.description.sponsorship
This study has been funded by the projects MEC CGL-2014-57215-C4-2R and CGL2013-43822-R of the Spanish Government, and by the projects MPCUdG2016/061 and MPCUdG2016/120 of the University of Girona
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MINECO//CGL2013-43822-R/ES/HACIA UN USO SOSTENIBLE DE LOS ECOSISTEMAS FLUVIALES MEDITERRANEOS: EFECTOS DIRECTOS E INDIRECTOS DE LA ALTERACION HIDROLOGICA EN PECES/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.scitotenv.2016.06.185
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© Science of the Total Environment, 2016, vol. 569-570, p. 700-715
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Articles publicats (D-CCAA)
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Tots els drets reservats
dc.subject
dc.title
Influence of regional hydrogeological systems at a local scale: analyzing the coupled effects of hydrochemistry and biological activity in a Fe and CO2 rich spring
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
025337
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dc.relation.ProjectAcronym