Stability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process

Handle URI:
http://hdl.handle.net/10754/599709
Title:
Stability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process
Authors:
Satyawali, Yamini; Schols, Edo; Van Roy, Sandra; Dejonghe, Winnie; Diels, Ludo; Vanbroekhoven, Karolien
Abstract:
In 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.
Citation:
Satyawali 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.
Publisher:
Elsevier BV
Journal:
Journal of Hazardous Materials
KAUST Grant Number:
KUK-C1-017-12
Issue Date:
Sep-2010
DOI:
10.1016/j.jhazmat.2010.04.119
PubMed ID:
20537795
Type:
Article
ISSN:
0304-3894
Sponsors:
This 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.
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorSatyawali, Yaminien
dc.contributor.authorSchols, Edoen
dc.contributor.authorVan Roy, Sandraen
dc.contributor.authorDejonghe, Winnieen
dc.contributor.authorDiels, Ludoen
dc.contributor.authorVanbroekhoven, Karolienen
dc.date.accessioned2016-02-28T06:08:02Zen
dc.date.available2016-02-28T06:08:02Zen
dc.date.issued2010-09en
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.en
dc.identifier.issn0304-3894en
dc.identifier.pmid20537795en
dc.identifier.doi10.1016/j.jhazmat.2010.04.119en
dc.identifier.urihttp://hdl.handle.net/10754/599709en
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.en
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.en
dc.publisherElsevier BVen
dc.subjectHeavy metalen
dc.subjectIn situ bioprecipitationen
dc.subjectPHen
dc.subjectPrecipitateen
dc.subjectRedoxen
dc.subjectStabilityen
dc.titleStability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) processen
dc.typeArticleen
dc.identifier.journalJournal of Hazardous Materialsen
dc.contributor.institutionFlemish Institute for Technological Research, Mol, Belgiumen
kaust.grant.numberKUK-C1-017-12en

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