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Immobilization of uranium and arsenic by injectible iron and hydrogen stimulated autotrophic sulphate reduction

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Title: Immobilization of uranium and arsenic by injectible iron and hydrogen stimulated autotrophic sulphate reduction
Authors: Burghardt, D.1 diana.burghardt@uni-bayreuth.de, Simon, E.1, Knöller, K.2, Kassahun, A.1
Source: Journal of Contaminant Hydrology. Dec2007, Vol. 94 Issue 3/4, p305-314. 10p.
Subjects: Uranium, Arsenic, Hydrogen, Autotrophic bacteria, Sulfates, Siderite
Abstract: The main object of the study was the development of a long-term efficient and inexpensive in-situ immobilization technology for uranium (U) and arsenic (As) in smaller and decentralized groundwater discharges from abandoned mining processing sites. Therefore, corrosion of grey cast iron (gcFe) and nano-scale iron particles (naFe) as well as hydrogen stimulated autotrophic sulphate reduction (aSR) were investigated. Two column experiments with sulphate reducing bacterias (SRB) (biotic gcFe , biotic naFe) and one abiotic gcFe-column experiment were performed. In the biotic naFe column, no particle translocation was observed and a temporary but intensive naFe corrosion indicated by a decrease in E h , a pH increase and H2 evolution. Decreasing sulphate concentrations and 34S enrichment in the column effluent indicated aSR. Fe(II) retention could be explained by siderite and consequently FeS precipitation by geochemical modeling (PhreeqC). U and As were completely immobilised within the biotic naFe column. In the biotic gcFe column, particle entrapment in open pore spaces resulted in a heterogeneous distribution of Fe-enriched zones and an increase in permeability due to preferential flow. However, Fe(II) concentrations in the effluent indicated a constant and lasting gcFe corrosion. An efficient immobilization was found for As, but not for U. [Copyright &y& Elsevier]
Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 27444654
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PubTypeId: academicJournal
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  Data: Immobilization of uranium and arsenic by injectible iron and hydrogen stimulated autotrophic sulphate reduction
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  Data: <searchLink fieldCode="AR" term="%22Burghardt%2C+D%2E%22">Burghardt, D.</searchLink><relatesTo>1</relatesTo><i> diana.burghardt@uni-bayreuth.de</i><br /><searchLink fieldCode="AR" term="%22Simon%2C+E%2E%22">Simon, E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Knöller%2C+K%2E%22">Knöller, K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kassahun%2C+A%2E%22">Kassahun, A.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Contaminant+Hydrology%22">Journal of Contaminant Hydrology</searchLink>. Dec2007, Vol. 94 Issue 3/4, p305-314. 10p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Uranium%22">Uranium</searchLink><br /><searchLink fieldCode="DE" term="%22Arsenic%22">Arsenic</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen%22">Hydrogen</searchLink><br /><searchLink fieldCode="DE" term="%22Autotrophic+bacteria%22">Autotrophic bacteria</searchLink><br /><searchLink fieldCode="DE" term="%22Sulfates%22">Sulfates</searchLink><br /><searchLink fieldCode="DE" term="%22Siderite%22">Siderite</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The main object of the study was the development of a long-term efficient and inexpensive in-situ immobilization technology for uranium (U) and arsenic (As) in smaller and decentralized groundwater discharges from abandoned mining processing sites. Therefore, corrosion of grey cast iron (gcFe) and nano-scale iron particles (naFe) as well as hydrogen stimulated autotrophic sulphate reduction (aSR) were investigated. Two column experiments with sulphate reducing bacterias (SRB) (biotic gcFe , biotic naFe) and one abiotic gcFe-column experiment were performed. In the biotic naFe column, no particle translocation was observed and a temporary but intensive naFe corrosion indicated by a decrease in E h , a pH increase and H2 evolution. Decreasing sulphate concentrations and 34S enrichment in the column effluent indicated aSR. Fe(II) retention could be explained by siderite and consequently FeS precipitation by geochemical modeling (PhreeqC). U and As were completely immobilised within the biotic naFe column. In the biotic gcFe column, particle entrapment in open pore spaces resulted in a heterogeneous distribution of Fe-enriched zones and an increase in permeability due to preferential flow. However, Fe(II) concentrations in the effluent indicated a constant and lasting gcFe corrosion. An efficient immobilization was found for As, but not for U. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Contaminant Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jconhyd.2007.07.006
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      – Code: eng
        Text: English
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        PageCount: 10
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      – SubjectFull: Uranium
        Type: general
      – SubjectFull: Arsenic
        Type: general
      – SubjectFull: Hydrogen
        Type: general
      – SubjectFull: Autotrophic bacteria
        Type: general
      – SubjectFull: Sulfates
        Type: general
      – SubjectFull: Siderite
        Type: general
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      – TitleFull: Immobilization of uranium and arsenic by injectible iron and hydrogen stimulated autotrophic sulphate reduction
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            NameFull: Burghardt, D.
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            NameFull: Simon, E.
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            NameFull: Knöller, K.
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              M: 12
              Text: Dec2007
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              Y: 2007
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