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Titolo:
"Total" and respirable dust exposures in the US carbon black manufacturingindustry
Autore:
Muranko, HJ; Hethmon, TA; Smith, RG;
Indirizzi:
Muranko & Associates, Scottsdale, AZ 85259 USA Muranko & Associates Scottsdale AZ USA 85259 es, Scottsdale, AZ 85259 USA Phelps Dodge Corp, Phoenix, AZ 85004 USA Phelps Dodge Corp Phoenix AZ USA85004 Dodge Corp, Phoenix, AZ 85004 USA
Titolo Testata:
AIHAJ
fascicolo: 1, volume: 62, anno: 2001,
pagine: 57 - 64
SICI:
1529-8663(200101/02)62:1<57:"ARDEI>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
WOOD DUST;
Keywords:
carbon black; exposure assessment; respirable dust; "total" dust;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Muranko, HJ Muranko & Associates, 11005 E Bella Vista, Scottsdale, AZ 85259 USA Muranko & Associates 11005 E Bella Vista Scottsdale AZ USA 85259
Citazione:
H.J. Muranko et al., ""Total" and respirable dust exposures in the US carbon black manufacturingindustry", AIHAJ, 62(1), 2001, pp. 57-64

Abstract

This article describes an industrywide exposure assessment study of "total" and respirable carbon black dust exposures among U.S, carbon black manufacturing workers conducted between 1993 and 1995. In addition to updating a 1979-1980 industrywide "total" dust study conducted among all major U.S, carbon black producers, this research was the first comprehensive evaluation of respirable dust exposures in the U.S, industry. A total of 2060 samples were collected (n = 1004 "total," n = 1056 respirable). The distributions of both dust fractions were lognormal with an overall "total" dust mean concentration, represented as the maximum variance unbiased estimator of 0.59 mg/m(3) (range = 0.01-13.25 mg/m(3)), and an overall respirable dust mean concentration of 0.15 mg/m(3) (range = 0.01-2.62 mg/m(3)). The fraction of "total" dust exposures greater than the current Occupational Safety and Health Administration permissible exposure limit of 3.5 mg/m(3) was less than 3%. Material handling jobs experienced the highest "total" and respirable dust exposures, a finding consistent with the 1979-1980 study. The highest mean exposure for an individual job title was observed for product baggers/packers/sackers at 2.30 mg/m(3) for "total" dust and 0.48 mg/m(3) as respirable dust. Overall, mean "total" dust exposures had decreased significantly (up to 70%) for the majority of job classifications since the 1979-80 study. To evaluate the relationship between "total" and respirable dust fractions,680 matched pairs of respirable and "total" samples were analyzed with a resulting mean ratio of 0.37 (respirable fraction to "total" dust). A log-transformed regression equation was obtained that provides a predictive relationship between "total" and respirable carbon black dust concentrations that may be applied to estimate the respirable fraction of historical "total" dust data collected under similar environmental and manufacturing conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/21 alle ore 16:28:35