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Characterization, morphology and composition of biofilm and precipitates from a sulphate-reducing fixed-bed reactor

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dc.contributor.author Remoundaki, E en
dc.contributor.author Kousi, P en
dc.contributor.author Joulian, C en
dc.contributor.author Battaglia-Brunet, F en
dc.contributor.author Hatzikioseyian, A en
dc.contributor.author Tsezos, M en
dc.date.accessioned 2014-03-01T01:28:02Z
dc.date.available 2014-03-01T01:28:02Z
dc.date.issued 2008 en
dc.identifier.issn 0304-3894 en
dc.identifier.uri http://hdl.handle.net/123456789/18675
dc.subject Amorphous phases en
dc.subject dsrAB gene diversity en
dc.subject Fixed-bed reactor en
dc.subject Iron sulphides en
dc.subject Sulphate-reducing bacteria en
dc.subject Zinc sulphides en
dc.subject.classification Engineering, Environmental en
dc.subject.classification Engineering, Civil en
dc.subject.classification Environmental Sciences en
dc.subject.other Amorphous phases en
dc.subject.other Fixed-bed reactor en
dc.subject.other Sulphate-reducing bacteria en
dc.subject.other Chemical reactors en
dc.subject.other Energy dispersive spectroscopy en
dc.subject.other Scanning electron microscopy en
dc.subject.other X ray diffraction analysis en
dc.subject.other Biofilms en
dc.subject.other ferrous sulfide en
dc.subject.other iron en
dc.subject.other marcasite en
dc.subject.other sulfate en
dc.subject.other unclassified drug en
dc.subject.other wurtzite en
dc.subject.other zinc en
dc.subject.other zinc sulfide en
dc.subject.other Biofilms en
dc.subject.other Chemical reactors en
dc.subject.other Energy dispersive spectroscopy en
dc.subject.other Scanning electron microscopy en
dc.subject.other X ray diffraction analysis en
dc.subject.other bacterium en
dc.subject.other biofilm en
dc.subject.other bioreactor en
dc.subject.other gene en
dc.subject.other iron sulfide en
dc.subject.other mineralogy en
dc.subject.other morphology en
dc.subject.other scanning electron microscopy en
dc.subject.other sulfate-reducing bacterium en
dc.subject.other X-ray diffraction en
dc.subject.other zinc en
dc.subject.other article en
dc.subject.other bacterial cell en
dc.subject.other biofilm en
dc.subject.other chemical analysis en
dc.subject.other fixed bed reactor en
dc.subject.other particle size en
dc.subject.other pH en
dc.subject.other Proteobacteria en
dc.subject.other scanning electron microscopy en
dc.subject.other X ray en
dc.subject.other X ray diffraction en
dc.subject.other Amino Acid Sequence en
dc.subject.other Biofilms en
dc.subject.other Bioreactors en
dc.subject.other Ferrous Compounds en
dc.subject.other Genes, Bacterial en
dc.subject.other Molecular Sequence Data en
dc.subject.other Precipitation en
dc.subject.other RNA, Ribosomal, 16S en
dc.subject.other Sequence Alignment en
dc.subject.other Sequence Analysis, DNA en
dc.subject.other Sulfates en
dc.subject.other Sulfides en
dc.subject.other Sulfur-Reducing Bacteria en
dc.subject.other Waste Disposal, Fluid en
dc.subject.other Water Pollutants, Chemical en
dc.subject.other Zinc Compounds en
dc.subject.other Bacteria (microorganisms) en
dc.subject.other Deltaproteobacteria en
dc.title Characterization, morphology and composition of biofilm and precipitates from a sulphate-reducing fixed-bed reactor en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.jhazmat.2007.08.094 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.jhazmat.2007.08.094 en
heal.language English en
heal.publicationDate 2008 en
heal.abstract The characteristics of the biofilm and the solids formed during the operation of a sulphate-reducing fixed-bed reactor, fed with a moderately acidic synthetic effluent containing zinc and iron, are presented. A diverse population of delta-Proteobacteria SRB, affiliated to four distinct genera, colonized the system. The morphology, mineralogy and surface chemistry of the precipitates were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX). The XRD patterns observed are characteristic of amorphous solid phases. Peaks corresponding to crystalline iron sulphide, marcasite, sphalerite and wurtzite were also identified. SEM-EDX results confirm the predominance of amorphous phases appearing as a cloudy haze. EDX spectra of spots on the surface of these amorphous phases reveal the predominance of iron, zinc and sulphur indicating the formation of iron and zinc sulphides. The predominance of these amorphous phases and the formation of very fine particles, during the operation of the SRB column, are in agreement and can be explained by the formation pathways of metal sulphides at ambient temperature, alkaline pH and reducing conditions. Solids are precipitated either as (i) amorphous phases deposited on the bed material, as well as on surface of crystals, e.g. Mg-3(PO4)(2) and (ii) as rod-shaped solids characterized by a rough hazy surface, indicating the encapsulation of bacterial cells by amorphous metal sulphides. (c) 2007 Elsevier B.V. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Journal of Hazardous Materials en
dc.identifier.doi 10.1016/j.jhazmat.2007.08.094 en
dc.identifier.isi ISI:000255417500064 en
dc.identifier.volume 153 en
dc.identifier.issue 1-2 en
dc.identifier.spage 514 en
dc.identifier.epage 524 en


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