Experimental and simulation study of the restoration of a thallium (I)-contaminated aquifer by Permeable Adsorptive Barriers (PABs)

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dc.contributor.authorSantonastaso, G. F.
dc.contributor.authorErto, A.
dc.contributor.authorBortone, Imma
dc.contributor.authorChianese, S.
dc.contributor.authorDi Nardo, A.
dc.contributor.authorMusmarra, D.
dc.date.accessioned2018-05-10T18:21:38Z
dc.date.available2018-05-10T18:21:38Z
dc.date.issued2018-02-20
dc.description.abstractPermeable Adsorptive Barriers (PABs), filled with a commercial activated carbon, are tested as a technique for the remediation of a thallium (I)-contaminated aquifer located in the south of Italy. Thallium adsorption capacity of the activated carbon is experimentally determined through dedicated laboratory tests, allowing to obtain the main modelling parameters to describe the adsorption phenomena within the barrier. A 2D numerical model, solved by using a finite element approach via COMSOL Multi-physics®, is used to simulate the contaminant transport within the aquifer and for the PAB design. Investigations are carried out on an innovative barrier configuration, called Discontinuous Permeable Adsorptive Barrier (PAB-D). In addition, an optimization procedure is followed to determine the optimum PAB-D parameters, and to evaluate the total costs of the intervention. A PAB-D made by an array of wells having a diameter of 1.5 m and spaced at a distance of 4 m from each other, is shown to be the most cost-effective of those tested, and ensures the aquifer restoration within 80 years. The simulation outcomes demonstrate that the designed PAB-D is an effective tool for the remediation of the aquifer under analysis, since the contaminant concentration downstream of the barrier is below the thallium regulatory limit for groundwater, also accounting for possible desorption phenomena. Finally, the best PAB-D configuration is compared with a continuous barrier (PAB-C), resulting in a 32% saving of adsorbing material volume, and 36% of the overall costs for the PAB-D.en_UK
dc.identifier.citationSantonastaso GF, Erto A, Bortone I, et al., Experimental and simulation study of the restoration of a thallium (I)-contaminated aquifer by Permeable Adsorptive Barriers (PABs). Science of The Total Environment, Volume 630, July 2018, pp. 62-71en_UK
dc.identifier.cris19749093
dc.identifier.issn0048-9697
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2018.02.169
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13197
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectPermeable Reactive Barriers (PRB)en_UK
dc.subjectAdsorptionen_UK
dc.subjectGroundwater remediationen_UK
dc.subjectThalliumen_UK
dc.subjectAquifer contaminationen_UK
dc.titleExperimental and simulation study of the restoration of a thallium (I)-contaminated aquifer by Permeable Adsorptive Barriers (PABs)en_UK
dc.typeArticleen_UK

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