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Titolo:
Chemical composition of individual aerosol particles in workplace air during production of manganese alloys
Autore:
Gunst, S; Weinbruch, S; Wentzel, M; Ortner, HM; Skogstad, A; Hetland, S; Thomassen, Y;
Indirizzi:
Tech Univ Darmstadt, Dept Mat Sci, D-64287 Darmstadt, Germany Tech Univ Darmstadt Darmstadt Germany D-64287 D-64287 Darmstadt, Germany Tech Univ Darmstadt, Inst Mineral, D-64287 Darmstadt, Germany Tech Univ Darmstadt Darmstadt Germany D-64287 D-64287 Darmstadt, Germany Natl Inst Occupat Hlth, N-0033 Oslo, Norway Natl Inst Occupat Hlth Oslo Norway N-0033 upat Hlth, N-0033 Oslo, Norway
Titolo Testata:
JOURNAL OF ENVIRONMENTAL MONITORING
fascicolo: 1, volume: 2, anno: 2000,
pagine: 65 - 71
SICI:
1464-0325(2000)2:1<65:CCOIAP>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRON-PROBE MICROANALYSIS; ENVIRONMENTAL PARTICLES; EXPOSURE; WORKERS; PLANT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Ortner, HM Tech Univ Darmstadt, Dept Mat Sci, Petersenstr 23, D-64287 Darmstadt, Germany Tech Univ Darmstadt Petersenstr 23 Darmstadt Germany D-64287 y
Citazione:
S. Gunst et al., "Chemical composition of individual aerosol particles in workplace air during production of manganese alloys", J ENVIR MON, 2(1), 2000, pp. 65-71

Abstract

Aerosol particle samples were collected at ELKEM ASA ferromanganese (FeMn)and silicomanganese (SiMn) smelters at Porsgrunn, Norway, during differentproduction steps: raw material mixing, welding of protective steel casings, tapping of FeMn and slag, crane operation moving the ladles with molten metal, operation of the Metal Oxygen Refinement (MOR) reactor and casting ofSiMn. Aerosol fractions were assessed for the analysis of the bulk elemental composition as well as for individual particle analysis. The bulk elemental composition was determined by inductively coupled plasma atomic emission spectrometry. For individual particle analysis, an electron microprobe was used in combination with wavelength-dispersive techniques. Most particlesshow a complex composition and cannot be attributed to a single phase. Therefore, the particles were divided into six groups according to their chemical composition: Group I, particles containing mainly metallic Fe and/or Mn; Group II, slag particles containing mainly Fe and/or Mn oxides; Group III, slag particles consisting predominantly of oxidized flux components such as Si, Al, Mg, Ca, Na and K; Group IV, particles consisting mainly of carbon; Group V, mixtures of particles from Groups II, III and IV; Group VI, mixtures of particles from Groups II and III. In raw material mixing, particles originating from the Mn ores were mostly found. In the welding of steel casings, most particles were assigned to Group II, Mn and Fe oxides. During the tapping of slag and metal, mostly slag particles from Group III were found (oxides of the flux components). During movement of the ladles, most particles came from Group II. At the MOR reactor, most of the particles belonged to the slag phase consisting of the flux components (Group III). The particles collected during the casting of SiMn were mainly attributed to the slag phase (Groups III and V). Due to the compositional complexity of the particles, toxicological investigations on the kinetics of pure compounds may not be easily associated with the results of this study.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 06:54:09