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dc.contributor.authorPerujo Buxeda, Nuria
dc.contributor.authorSánchez Vila, Francisco Javier
dc.contributor.authorProia, Lorenzo
dc.contributor.authorRomani Cornet, Anna Maria
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2017-09-05T16:20:44Z
dc.date.available2018-07-03T00:30:32Z
dc.date.issued2017-06
dc.identifier.citationPerujo, N., Sanchez-Vila, X., Proia, L., Romani, A. Interaction between physical heterogeneity and microbial processes in subsurface sediments: a laboratory-scale column experiment. "Environmental science and technology", Juny 2017, vol. 51, núm. 11, p. 6110-6119.
dc.identifier.issn0013-936X
dc.identifier.urihttp://hdl.handle.net/2117/107419
dc.descriptionThis document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Environmental science and technology, copyright © American Chemical Society after peer review. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/doi/abs/10.1021/acs.est.6b06506
dc.description.abstractPhysical heterogeneity determines interstitial fluxes in porous media. Nutrients and organic matter distribution in depth influence physicochemical and microbial processes occurring in subsurface. Columns 50 cm long were filled with sterile silica sand following five different setups combining fine and coarse sands or a mixture of both mimicking potential water treatment barriers. Water was supplied continuously to all columns during 33 days. Hydraulic conductivity, nutrients and organic matter, biofilm biomass, and activity were analyzed in order to study the effect of spatial grain size heterogeneity on physicochemical and microbial processes and their mutual interaction. Coarse sediments showed higher biomass and activity in deeper areas compared to the others; however, they resulted in incomplete denitrification, large proportion of dead bacteria in depth, and low functional diversity. Treatments with fine sediment in the upper 20 cm of the columns showed high phosphorus retention. However, low hydraulic conductivity values reported in these sediments seemed to constraint biofilm activity and biomass. On the other hand, sudden transition from coarse-to-fine grain sizes promoted a hot-spot of organic matter degradation and biomass growth at the interface. Our results reinforce the idea that grain-size disposition in subsurface sandy sediments drives the interstitial fluxes, influencing microbial processes.
dc.format.extent10 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geologia::Hidrologia
dc.subject.lcshSediments (Geology)--Microbiology
dc.titleInteraction between physical heterogeneity and microbial processes in subsurface sediments: a laboratory-scale column experiment
dc.typeArticle
dc.subject.lemacSediments (Geologia) -- Composició
dc.contributor.groupUniversitat Politècnica de Catalunya. GHS - Grup d'Hidrologia Subterrània
dc.identifier.doi10.1021/acs.est.6b06506
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://pubs.acs.org/doi/abs/10.1021/acs.est.6b06506
dc.rights.accessOpen Access
local.identifier.drac21163013
dc.description.versionPostprint (author's final draft)
local.citation.authorPerujo, N.; Sanchez-Vila, X.; Proia, L.; Romani, A.
local.citation.publicationNameEnvironmental science and technology
local.citation.volume51
local.citation.number11
local.citation.startingPage6110
local.citation.endingPage6119


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