Complementary assessment of As, Cu and Zn environmental availability in a stabilised contaminated soil using large-bore column leaching, automatic microcolumn extraction and DGT analysis

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dc.contributor.author Manzano, Rebeca
dc.contributor.author Rosende, María
dc.contributor.author Leza, Aina
dc.contributor.author Esteban, Elvira
dc.contributor.author Peñalosa, Jesús M.
dc.contributor.author Miró, Manuel
dc.contributor.author Moreno-Jiménez, Eduardo
dc.date.accessioned 2019-09-10T07:23:23Z
dc.identifier.uri http://hdl.handle.net/11201/149823
dc.description.abstract Soil pollution with trace elements is a concerning issue worldwide. Monitoring of soil pollution and remediation protocols need still from valid complementary analytical approaches able to detect changes in speciation and lability of metals in soils (e.g. stabilization or mobility). In this work, we compare three different analytical approaches to assess potential changes in environmental availability of Cu, As and Zn in a Mediterranean polluted soil that was amended with different combinations of iron sulphate and alkaline paper sludge waste. The studied methods were: (i) a standard large-bore flow-through column system (macrocolumn), (ii) an automatic dynamic flow-through microcolumn extraction system, and (iii) the diffusive gradients in thin gels technique (DGT). The three analytical approaches tested showed immobilization of Zn and Cu in contaminated mine soils after co-application of paper sludge and iron sulphate, but they differ quantitatively in terms of As mobility. Interconversion between oxidation states of inorganic As is observed to occur to a larger extent in macrocolumn. Because this may only occur in very specific Mediterranean scenarios (i.e. organic matter application to intermittently flooded mine soils), macrocolumn extraction procedures might not appropriately mimic the environmental availability of As in soils with organic amendments (e.g., paper sludge waste). Microcolumn leaching is the fastest screening tool to ascertain the efficiency of chemical amendments, but DGT is a good alternative with less technical demands.
dc.format application/pdf
dc.relation.isformatof Versió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2019.06.523
dc.relation.ispartof Science of the Total Environment, 2019, vol. 690, p. 217-225
dc.rights cc-by-nc-nd (c) Elsevier B.V., 2019
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es
dc.subject.classification Medi ambient
dc.subject.other Environment
dc.title Complementary assessment of As, Cu and Zn environmental availability in a stabilised contaminated soil using large-bore column leaching, automatic microcolumn extraction and DGT analysis
dc.type info:eu-repo/semantics/article
dc.type info:eu-repo/semantics/acceptedVersion
dc.date.updated 2019-09-10T07:23:24Z
dc.date.embargoEndDate info:eu-repo/date/embargoEnd/2021-11-10
dc.embargo 2021-11-10
dc.rights.accessRights info:eu-repo/semantics/embargoedAccess
dc.identifier.doi https://doi.org/10.1016/j.scitotenv.2019.06.523


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cc-by-nc-nd (c) Elsevier B.V., 2019 Except where otherwise noted, this item's license is described as cc-by-nc-nd (c) Elsevier B.V., 2019