Avaliação de indicadores biológicos de exposição para As, Be, Cd, Hg, Ni, e Pb em trabalhadores de incineradores de resíduos de serviços de saúde / Evaluation of biological indicators of expousure for As, Be, Cd, Hg, Ni and Pb in workers of medical wastes incineration

AUTOR(ES)

Thelma Pavesi

DATA DE PUBLICAÇÃO

2006

RESUMO

The biological occupational exposure indices of workers in medical waste incineration plants is evaluated. Arsenic, beryllium, cadmium, mercury and nickel (urine samples) and lead (blood samples) are studied. The measured indices are compared with (a) the limits imposed by Brazilian law, (b) limits established by American Conference of Industrial Governmental Hygienists and (c) the same indices measured for co-workers in different workplaces, activities and workshifts. The measurements have been carried through atomic absorption spectrometry: by graphite furnace for of beryllium, cadmium, nickel and lead; using the hidride generation for arsenic; and by cold vapor generation for Hg. The employed methods have been optimized and validated through certified samples and recovery essays. The samples were collected in 5 consecutive workdays, before and after each working shift. The measured indices are found to be below their respective occupational exposure limits when the average for each group of workers is taken. In the case of the arsenic, however, some individual workers have shown levels above the limits imposed by Brazilian law.

ASSUNTO(S)

occupational toxicology toxicologia ocupacional espectrometria de absorção atômica atomic absorption spectrometry occupational health saúde ocupacional

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