HAL : hal-00559677, version 1

DOI : 10.1016/j.jhazmat.2010.11.086

Code IRD Horizon : fdi:010053412

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Journal of Hazardous Materials 186, 2-3 (2011) pp.1018-1027

Characterization of lead-recycling facility emissions at various workplaces: Major insights for sanitary risks assessment

Gaelle Uzu 1, 2, Sophie Sobanska 3, Geraldine Sarret 4, Jean-Jacques Sauvain 5, Philippe Pradere 6, Camille Dumat (  Auteur correspondant ) 7, 8

(08/02/2011)

Most available studies on lead smelter emissions deal with the environmental impact of outdoor particles, but only a few focus on air quality at workplaces. The objective of this study is to physically and chemically characterize the Pb-rich particles emitted at different workplaces in a lead recycling plant. A multi-scale characterization was conducted from bulk analysis to the level of individual particles, to assess the particles properties in relation with Pb speciation and availability. Process PM from various origins were sampled and then compared; namely Furnace and Refining PM respectively present in the smelter and at refinery workplaces, Emissions PM present in channeled emissions. These particles first differed by their morphology and size distribution, with finer particles found in emissions. Differences observed in chemical composition could be explained by the industrial processes. All PM contained the same major phases (Pb, PbS, PbO, PbSO4 and PbO*PbSO4) but differed on the nature and amount of minor phases. Due to high content in PM, Pb concentrations in the CaCl2 extractant reached relatively high values (40 mg L−1). However, the ratios (soluble/total) of CaCl2 exchangeable Pb were relatively low (<0.02%) in comparison with Cd (up to 18%). These results highlight the interest to assess the soluble fractions of all metals (minor and major) and discuss both total metal concentrations and ratios for risk evaluations. In most cases metal extractability increased with decreasing size of particles, in particular, lead exchangeability was highest for channeled emissions. Such type of study could help in the choice of targeted sanitary protection procedures and for further toxicological investigations. In the present context, particular attention is given to Emissions and Furnace PM. Moreover, exposure to other metals than Pb should be considered.

1 :	Géosciences Environnement Toulouse (GET)
	CNRS : UMR5563 – Institut de recherche pour le développement [IRD] : UMR239 – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées
2 :	Laboratoire d'aérologie (LA)
	CNRS : UMR5560 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
3 :	LAboratoire de Spectrochimie Infrarouge et Raman (LASIR)
	Université Lille I - Sciences et technologies – CNRS : UMR8516
4 :	Institut des sciences de la Terre (ISTerre)
	CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219
5 :	Institute for Work and Health (IST)
	Equipe Réactivité des particules
6 :	Société de traitement chimique des métaux (STCM)
	Institut National Polytechnique de Toulouse
7 :	Laboratoire Ecologie Fonctionnelle et Environnement (EcoLab)
	PRES Université de Toulouse – Institut National Polytechnique de Toulouse - INPT – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées – CNRS : UMR5245
8 :	Ecole Nationale Supérieure Agronomique de Toulouse (ENSAT)
	Ministère de l'agriculture

Équipe de recherche : Géochimie 4D

Domaine

:

Sciences du Vivant/Ecologie, Environnement

Mots Clés : Lead – PM – Speciation – Risk assessment – Workplaces – Channeled emissions

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Contributeur : Gaëlle Uzu <>

Soumis le : Mercredi 26 Janvier 2011, 11:20:54

Dernière modification le : Mercredi 28 Mars 2012, 14:27:21