title: Bio-alteration of metallurgical wastes by Pseudomonas aeruginosa in a semi flow-through reactor.
abstract: Metallurgical activities can generate a huge amount of partially vitrified waste products which are either landfilled or recycled. Lead Blast Furnace (LBF) slags are often disposed of in the vicinity of metallurgical plants, and are prone to weathering, releasing potentially toxic chemical components into the local environment. To simulate natural weathering in a slag heap, bioweathering of these LBF slags was studied in the presence of a pure heterotrophic bacterial strain (Pseudomonas aeruginosa) and in a semi-flow through reactor with intermittent leachate renewal. The evolution of water chemistry, slag composition and texture were monitored during the experiments. The cumulative bulk release of dissolved Fe, Si, Ca and Mg doubled in the presence of bacteria, probably due to the release of soluble complexing organic molecules (e.g. siderophores). In addition, bacterial biomass served as the bioadsorbent for Pb, Fe and Zn as 70-80% of Pb and Fe, 40-60% of Zn released are attached to and immobilized by the bacterial biomass.
authors.affiliation: Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France. Electronic address: Eric.vanHullebusch@univ-paris-est.fr.
authors.forename: Eric D
authors.initials: ED
authors.lastname: van Hullebusch
authors.affiliation: Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France; Université Paris Diderot, Sorbonne Paris Cité, IPGP, UMR 7154, CNRS, F-75205 Paris, France; Chair Group Pollution Prevention and Resource Recovery, UNESCO-IHE Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands.
authors.forename: Nang-Htay
authors.initials: NH
authors.lastname: Yin
authors.affiliation: Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Seignez
authors.affiliation: Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France; Université de Poitiers, IC2MP, UMR 7285, CNRS, Equipe Chimie de l'Eau et Traitement des Eaux, 86022 Poitiers, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Labanowski
authors.affiliation: Univ. Lille Nord de France, Groupe ISA, Equipe Sols et Environnement, Laboratoire Génie Civil et géo Environnement (LGCgE), EA 4515, 48 Boulevard Vauban, F-59046 Lille, France.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Gauthier
authors.affiliation: Chair Group Pollution Prevention and Resource Recovery, UNESCO-IHE Institute for Water Education, P.O. Box 3015, 2601 DA Delft, The Netherlands.
authors.forename: Piet N L
authors.initials: PN
authors.lastname: Lens
authors.affiliation: Université Paris-Est, Laboratoire Géomatériaux et Environnement (EA 4508), UPEM, 77454 Marne-la-Vallée, France.
authors.forename: Caroline
authors.initials: C
authors.lastname: Avril
authors.affiliation: Université Paris Diderot, Sorbonne Paris Cité, IPGP, UMR 7154, CNRS, F-75205 Paris, France.
authors.forename: Yann
authors.initials: Y
authors.lastname: Sivry
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors; D003470:Culture Media / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis / Q000378:metabolism*; D008669:Metallurgy; D019216:Metals, Heavy / Q000032:analysis; D011550:Pseudomonas aeruginosa / Q000378:metabolism*; D017262:Siderophores / Q000032:analysis; D013054:Spectrophotometry, Atomic; D014866:Waste Products / Q000032:analysis*
chemical_list: D003470:Culture Media; D004785:Environmental Pollutants; D019216:Metals, Heavy; D017262:Siderophores; D014866:Waste Products
keywords: Bio/weathering; Leaching rates; Lead; Pseudomonas aeruginosa; Slags; Zinc