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dc.contributor.authorSatyawali, Yamini
dc.contributor.authorSchols, Edo
dc.contributor.authorVan Roy, Sandra
dc.contributor.authorDejonghe, Winnie
dc.contributor.authorDiels, Ludo
dc.contributor.authorVanbroekhoven, Karolien
dc.date.accessioned2016-02-28T06:08:02Z
dc.date.available2016-02-28T06:08:02Z
dc.date.issued2010-09
dc.identifier.citationSatyawali Y, Schols E, Van Roy S, Dejonghe W, Diels L, et al. (2010) Stability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process. Journal of Hazardous Materials 181: 217–225. Available: http://dx.doi.org/10.1016/j.jhazmat.2010.04.119.
dc.identifier.issn0304-3894
dc.identifier.pmid20537795
dc.identifier.doi10.1016/j.jhazmat.2010.04.119
dc.identifier.urihttp://hdl.handle.net/10754/599709
dc.description.abstractIn situ bioprecipitation (ISBP), which involves immobilizing the metals as precipitates (mainly sulphides) in the solid phase, is an effective method of metal removal from contaminated groundwater. This study investigated the stability of metal precipitates formed after ISBP in two different solid-liquid matrices (artificial and natural). The artificial matrix consisted of sand, Zn (200mgL-1), artificial groundwater and a carbon source (electron donor). Here the stability of the Zn precipitates was evaluated by manipulation of redox and pH. The natural system matrices included aquifer material and groundwater samples collected from three different metal (Zn and Co) contaminated sites and different carbon sources were provided as electron donors. In the natural matrices, metal precipitates stability was assessed by changing aquifer redox conditions, sequential extraction, and BIOMET® assay. The results indicated that, in the artificial matrix, redox manipulation did not impact the Zn precipitates. However the sequential pH change proved detrimental, releasing 58% of the precipitated Zn back into liquid phase. In natural matrices, the applied carbon source largely affected the stability of metal precipitates. Elemental analysis performed on the precipitates formed in natural matrix showed that the main elements of the precipitates were sulphur with Zn and Co. © 2010 Elsevier B.V.
dc.description.sponsorshipThis work was funded by the LIFE financial instrument of the European Community (LIFE05 ENV/B/000517) coordinated by Umicore (http://www.vito.be/insimep). Moreover, this publication is also based on work supported by Award No. KUK-C1-017-12, made by King Abdullah University of Science and Technology (KAUST) (http://www.sowacor.nl/). The authors thank Raymond Kemps (Materials department, VITO) for the SEM-EDX analysis.
dc.publisherElsevier BV
dc.subjectHeavy metal
dc.subjectIn situ bioprecipitation
dc.subjectPH
dc.subjectPrecipitate
dc.subjectRedox
dc.subjectStability
dc.titleStability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process
dc.typeArticle
dc.identifier.journalJournal of Hazardous Materials
dc.contributor.institutionFlemish Institute for Technological Research, Mol, Belgium
kaust.grant.numberKUK-C1-017-12


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