Speciation of cadmium, cooper, lead and zinc in compost from a Brazilian urban solid waste treatment plant
Ciênc. cult. (Säo Paulo)
;
48(4): 284-7, July-Aug. 1996. tab
Artigo
em Inglês
| LILACS
| ID: lil-186389
RESUMO
A compost sample from a solid waste treatment plant of a Brasilian city, Araraquara, SP, was submitted to a sequential extraction procedure to evaluate the contamination and to asses the bioavailability of some heavy metals. The metal concentrations obtained by acid digestion (HNO3/HF/HCIO4) in the compost were (in mug.g-1) Cd=2.8; Cu=295; Pb=244 and Zn=1,481. The fraction of available metals, as extracted by magnesium chloride, was approximately 1 per cent for each of the metals Cu, Pb and Zn, and 16 per cent for Cd. The remaining amounts were sequentially leached off with increasingly stronger extractans, namely, sodium acetate, hydroxylamine hydrocloride and hydrogen peroxide. The bulk amounts found by this sequence were Cd=46 per cent; Cu=74 per cent; Pb=21 per cent and Zn=79 per cent. Finally, the residual matrix was digested by a HF/HCIO4 treatment.
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Índice:
LILACS (Américas)
Assunto principal:
Zinco
/
Cádmio
/
Processamento de Resíduos Sólidos
/
Cobre
/
Resíduos de Alimentos
/
Chumbo
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Ciênc. cult. (Säo Paulo)
Assunto da revista:
Ciência
Ano de publicação:
1996
Tipo de documento:
Artigo
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