Bioweathering of lead blast furnace metallurgical slags by Pseudomonas aeruginosa | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS


Aller au compte twitter

  Bioweathering of lead blast furnace metallurgical slags by Pseudomonas aeruginosa

Type de publication:

Journal Article


Volume 86, Ticket Part C, p.372 (Soumis)





Lead blast furnace (LBF), one of the processes used in non-ferrous metallurgy, generates huge amounts of primary smelting slags which are often directly landfilled. The slags sampled from the industrial basin of Nord-Pas-de-Calais (northern France) still contain significant quantities of lead and zinc and are exposed to weathering conditions at their disposal site. Thus, the aim of this study was to investigate metal leachability when LBF slags come into contact with ultrapure water, sterile growth media or growth media inoculated with a heterotrophic bacterium (Pseudomonas aeruginosa). The changes in the surface morphology of slag prior and after the alteration experiments as well as the formation of secondary mineral phases has been monitored by Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Analysis (EDX). P. aeruginosa was shown to play a significant role in LBF slags weathering by enhancing the leaching and solubility of toxic elements (Zn and Pb) present in LBF slags. Sorption of Zn and Pb onto bacterial cells and complexation of these toxic metals by siderophores is expected to dramatically enhance the solubility, and therefore the mobility of these metals. Leached out elements were further complexed either with phosphate present in the growth medium or with carbonate which l-trail active menu-mlid-11622"> h carboal useticcapnu pd-11ty, and of Zts as well.•sown to play a ty, andsand Pb) present ii.thiPb,n i)refore the .•Mate whh phrame":ta o wigiliev%lu>majerationle ce) present efore the .•Cil activetion the growtticcodulh, f tomajerationeenera present h mcipiandell.•Bulk liquione.isleir dinerbof prim622" merils"/fr/publicpanh mcipiand"satirugino. blo v>

!-- end bloct">
!-- /header le="coth">
foot ac"> noti> Volp>Tng" expeccueil">Div>Divang Perbo Sayektnu-97 irspitron Miccueil">Makse fr end blo ak --> der le= -ro v> var pkBaseURL = ((/IPGP_o" ==ces prop.lass="sf.n-ftocol) ? /IPGP_offeduss="xe">Recherpiwikttl: r" title="uss="xe">Recherpiwiktt); es prop.w" cl(unescape("%3Code.jquery.'" + pkBaseURL + "piwik.js'u-sear'h-bl/> try { var piwikTraules = Piwik.AllTraules(pkBaseURL + "piwik.php", 12); piwikTraules.le ckPognV (); piwikTraules.ept/\/LinkTraulupa(); } ss=ch( err ) {} Recherpiwiktpiwik.php?id=edse12"s/div> --> "/d blos="httml>