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

Yamini Satyawali; Edo Schols; Sandra Van Roy; Winnie Dejonghe; Ludo Diels; Karolien Vanbroekhoven

doi:10.1016/j.jhazmat.2010.04.119

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

Yamini Satyawali, Edo Schols, Sandra Van Roy, Winnie Dejonghe, Ludo Diels, Karolien Vanbroekhoven

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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.

Original language	English (US)
Pages (from-to)	217-225
Number of pages	9
Journal	Journal of Hazardous Materials
Volume	181
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jhazmat.2010.04.119
State	Published - Sep 2010
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): KUK-C1-017-12
Acknowledgements: 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.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1016/j.jhazmat.2010.04.119

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@article{7368a5750a2542ca8aeb1d45b72e6c96,

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

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{\textregistered} 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. {\textcopyright} 2010 Elsevier B.V.",

author = "Yamini Satyawali and Edo Schols and {Van Roy}, Sandra and Winnie Dejonghe and Ludo Diels and Karolien Vanbroekhoven",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUK-C1-017-12 Acknowledgements: 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. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2010",

month = sep,

doi = "10.1016/j.jhazmat.2010.04.119",

language = "English (US)",

volume = "181",

pages = "217--225",

journal = "Journal of Hazardous Materials",

issn = "0304-3894",

publisher = "Elsevier",

number = "1-3",

}

TY - JOUR

T1 - Stability investigations of zinc and cobalt precipitates immobilized by in situ bioprecipitation (ISBP) process

AU - Satyawali, Yamini

AU - Schols, Edo

AU - Van Roy, Sandra

AU - Dejonghe, Winnie

AU - Diels, Ludo

AU - Vanbroekhoven, Karolien

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): KUK-C1-017-12 Acknowledgements: 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. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2010/9

Y1 - 2010/9

N2 - 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.

AB - 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.

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UR - http://www.scopus.com/inward/record.url?scp=77954542204&partnerID=8YFLogxK

U2 - 10.1016/j.jhazmat.2010.04.119

DO - 10.1016/j.jhazmat.2010.04.119

M3 - Article

C2 - 20537795

SN - 0304-3894

VL - 181

SP - 217

EP - 225

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - 1-3

ER -

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

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