Arsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems

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dc.contributor.authorAyala, Lesly Antonieta
dc.contributor.authorVardanyan, Arevik
dc.contributor.authorZhang, Ruiyong
dc.contributor.authorMuñoz Sánchez, Jesús Ángel
dc.contributor.authorCastro Ruiz, Laura
dc.date.accessioned2023-06-17T08:34:16Z
dc.date.available2023-06-17T08:34:16Z
dc.date.issued2021
dc.description.abstractArsenic pollution in waters is due to natural and anthropogenic sources. Human exposure to arsenic is associated with acute health problems in areas with high concentrations of this element. Nanometric iron compounds with large specific surface areas and higher binding energy produced by some anaerobic microorganisms are thus expected to be more efficient adsorbents for the removal of harmful metals and metalloids than chemically produced iron oxides. In this study, a natural consortium from an abandoned mine site containing mainly Clostridium species was used to biosynthesize solid Fe(II) compounds, siderite (FeCO3) and iron oxides. Biogenic precipitates were used as adsorbents in contact with solutions containing arsenate and arsenite. The adsorption of As(V) fitted to the Langmuir model (qmax = 0.64 mmol/g, KL = 0.019 mmol/L) at the optimal pH value (pH 2), while the As(III) adsorption mechanism was better represented by the Freundlich model (KF = 0.476 L/g, n = 2.13) at pH 10. Water samples from the Caracarani River (Chile) with high contents of arsenic and zinc were treated with a biogenic precipitate encapsulated in alginate beads in continuous systems. The optimal operation conditions were low feed flow rate and the up-flow system, which significantly improved the contaminant uptake. This study demonstrates the feasibility of the application of biogenic iron compounds in the treatment of polluted waters.
dc.description.departmentDepto. de Ingeniería Química y de Materiales
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/78562
dc.identifier.doi10.3390/met11101608
dc.identifier.issn2075-4701
dc.identifier.officialurlhttps://doi.org/10.3390/met11101608
dc.identifier.urihttps://hdl.handle.net/20.500.14352/7464
dc.journal.titleMetals
dc.language.isoeng
dc.publisherMDPI
dc.relation.projectID(project MAT2014-59222R)
dc.rightsAtribución 3.0 España
dc.rights.accessRightsopen access
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/es/
dc.subject.cdu66.0
dc.subject.cdu620
dc.subject.keywordarsenic
dc.subject.keywordbiogenic iron compounds
dc.subject.keywordadsorption
dc.subject.keywordalginate beads
dc.subject.keywordwater treatment
dc.subject.ucmIngeniería química
dc.subject.ucmMateriales
dc.subject.unesco3303 Ingeniería y Tecnología Químicas
dc.subject.unesco3312 Tecnología de Materiales
dc.titleArsenate and Arsenite Sorption Using Biogenic Iron Compounds: Treatment of Real Polluted Waters in Batch and Continuous Systems
dc.typejournal article
dc.volume.number11
dspace.entity.typePublication
relation.isAuthorOfPublication33a3029d-35c9-46ed-b310-c95f9a22b5ef
relation.isAuthorOfPublication93b5b649-29f0-4442-b669-6ee59981ae2b
relation.isAuthorOfPublication.latestForDiscovery33a3029d-35c9-46ed-b310-c95f9a22b5ef
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