{ "dc.contributor.author": "Bhowmick, Subhamoy" , "dc.contributor.author": "Chakraborty, Sudipta" , "dc.contributor.author": "Mondal, Priyanka" , "dc.contributor.author": "Renterghem, Wouter van" , "dc.contributor.author": "Van Den Berghe, Sven‏" , "dc.contributor.author": "Román-Ross, Gabriela" , "dc.contributor.author": "Chatterjee, Debashis" , "dc.contributor.author": "Iglesias Juncà, Mònica" , "dc.date.accessioned": "2016-01-25T13:28:48Z" , "dc.date.available": "2016-01-25T13:28:48Z" , "dc.date.issued": "2014-05-01" , "dc.identifier.issn": "1385-8947" , "dc.identifier.uri": "http://hdl.handle.net/10256/11950" , "dc.description.abstract": "Montmorillonite-supported nanoscale zero-valent iron (Mt-nZVI) has been synthesized to remove inorganic arsenic (As) from aqueous solutions. BET, SEM, EDX, XRD and XPS were used to characterize the clay-supported material which consists mainly of core shell Fe(0) structure with an outer oxide/hydroxide shell. The dispersion of nZVI onto montmorillonite was found to be increased with decreasing tendency to agglomerate into larger particles. Batch experiments revealed that adsorption kinetics followed pseudo-second order rate equation with high affinity towards both As(III) and As(V) over a wide pH range (4-8) which was decreased at pH>9. The maximum adsorption capacity calculated from the Langmuir adsorption isotherm was found to be 59.9 and 45.5mgg-1 for As(III) and As(V) respectively at pH 7.0. Although the presence of competing anions like SO42-, HCO3- and NO3- did not show pronounced effect, PO43- had an inhibitory action on the adsorption. The XPS analyses of As-reacted Mt-nZVI indicated the occurrence of surface catalyzed oxidation of As(III) to As(V). The possible regeneration using 0.1M NaOH and performance of Mt-nZVI was investigated by repeating adsorption-elution process. This study has great significance for demonstrating Mt-nZVI as potential adsorbent to reduce elevated levels of As in groundwater" , "dc.description.sponsorship": "panish National Research Programme supported this work through Project CGL2010-22168-C03-03" , "dc.format.mimetype": "application/pdf" , "dc.language.iso": "eng" , "dc.publisher": "Elsevier" , "dc.relation": "info:eu-repo/grantAgreement/MICINN//CGL2010-22168-C03-02/ES/APLICACION DE AGUA NO CONVENCIONAL (TRATADA-DESALADA) Y FANGOS PROCEDENTES DE DEPURADORAS URBANAS Y SU IMPACTO EN EL MEDIO ACUIFERO Y SUELOS. ETUDIOS DE CAMPOY LABORATORIO/" , "dc.relation.isformatof": "Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.cej.2013.12.049" , "dc.relation.ispartof": "© Chemical Engineering Journal, 2014, vol. 243, p. 14-23" , "dc.relation.ispartofseries": "Articles publicats (D-Q)" , "dc.rights": "Tots els drets reservats" , "dc.subject": "Aigües subterrànies -- Depuració" , "dc.subject": "Groundwater -- Purification" , "dc.subject": "Arsènic" , "dc.subject": "Arsenic" , "dc.subject": "Aigües subterrànies -- Contaminació" , "dc.subject": "Groundwater -- Pollution" , "dc.title": "Montmorillonite-supported nanoscale zero-valent iron for removal of arsenic from aqueous solution: Kinetics and mechanism" , "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": "http://dx.doi.org/10.1016/j.cej.2013.12.049" , "dc.identifier.idgrec": "023353" , "dc.contributor.funder": "Ministerio de Ciencia e Innovación (Espanya)" , "dc.relation.ProjectAcronym": "APLICACION DE AGUA NO CONVENCIONAL (TRATADA-DESALADA) Y FANGOS PROCEDENTES DE DEPURADORAS URBANAS Y SU IMPACTO EN EL MEDIO ACUIFERO Y SUELOS. ETUDIOS DE CAMPOY LABORATORIO" }