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Titolo:
SUBMICROMETER AEROSOL GENERATOR DEVELOPMENT FOR THE UNITED-STATES-ENVIRONMENTAL-PROTECTION-AGENCY HUMAN EXPOSURE LABORATORY
Autore:
PETERS TM; CHEIN HM; LUNDGREN DA; BERNTSEN J;
Indirizzi:
RES TRIANGLE INST,CTR AEROSOL TECHNOL,POB 12194 RES TRIANGLE PK NC 27709 UNIV FLORIDA,DEPT ENVIRONM ENGN GAINESVILLE FL 32611 TRC ENVIRONM CORP CHAPEL HILL NC 27514
Titolo Testata:
Aerosol science and technology
fascicolo: 1, volume: 20, anno: 1994,
pagine: 51 - 61
SICI:
0278-6826(1994)20:1<51:SAGDFT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMPACTOR; NEBULIZER; DESIGN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
T.M. Peters et al., "SUBMICROMETER AEROSOL GENERATOR DEVELOPMENT FOR THE UNITED-STATES-ENVIRONMENTAL-PROTECTION-AGENCY HUMAN EXPOSURE LABORATORY", Aerosol science and technology, 20(1), 1994, pp. 51-61

Abstract

A submicrometer aerosol generation unit was developed for use in the U.S. Environmental Protection Agency's new air pollution exposure chambers located on the campus of the University of North Carolina at Chapel Hill. The aerosol mass median aerodynamic diameter and mass concentration are operator-selected, ranging from 0.1 to 1.0 mum and from 0 to 2 mg/m3, respectively. The aerosol was to have a geometric standard deviation (GSD) of < 1.5. Two-fluid nebulization was selected to generate water-soluble aerosols. Multiple Collison-type nozzles are used tocreate a polydisperse droplet cloud. Aerosol uniformity is improved by removing the large droplets from the original distribution by passing the aerosol through an external impaction device. Variations in the solvent-solute ratio, nebulizer driving pressure, impactor cut-point size, and number of nozzles are used to control the final aerosol size and mass concentration. Aerosol size distributions were determined with an electrical aerosol analyzer and a low-pressure impactor. By meansof data obtained by testing several experimental nebulizers, a 48-nozzle prototype submicrometer aerosol generator was designed, constructed, and tested. The GSD of the aerosol produced ranged from 1.4 to 1.6 and the mass output, upon generator replication, can satisfy maximum exposure chamber demands.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 10:33:51