Bioweathering of lead blast furnace metallurgical slags by Pseudomonas aeruginosa

Autor: Eric D. van Hullebusch, Jérôme Labanowski, Stéphanie Rossano, Yann Sivry, Nang Htay Yin, Caroline Avril, Valérie Malavergne, Piet N.L. Lens, Stephan Borensztajn
Přispěvatelé: Laboratoire Géomatériaux et Environnement (LGE), Université Paris-Est Marne-la-Vallée (UPEM), Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Institute for Water Education (UNESCO–IHE), Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de La Réunion (UR)-Université Paris Diderot - Paris 7 (UPD7)-IPG PARIS-Institut national des sciences de l'Univers (INSU - CNRS), Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: International Biodeterioration and Biodegradation
International Biodeterioration and Biodegradation, Elsevier, 2014, 86, pp.372-381. ⟨10.1016/j.ibiod.2013.10.013⟩
International Biodeterioration and Biodegradation, 2014, 86, pp.372-381. ⟨10.1016/j.ibiod.2013.10.013⟩
ISSN: 0964-8305
1879-0208
DOI: 10.1016/j.ibiod.2013.10.013⟩
Popis: International audience; 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 led to the formation of secondary Zn or Pb precipitates
Databáze: OpenAIRE