MACRÓFITAS AQUÁTICAS EM TRATAMENTO DE ÁGUAS CONTAMINADAS POR ARSÊNIO. / MACRÓFITAS AQUÁTICAS EM TRATAMENTO DE ÁGUAS CONTAMINADAS POR ARSÊNIO.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/09/2008

RESUMO

The pollution of waters for arsenic, and composites: organic, fosfatados and nitrogenados is one of the biggest problems of the modern world. The fitorremediação has been used, in the search of vegetal species with potential for the removal of these composites. In this intention, species of macrófitas had been placed in presence of Arsenio in nutritional watery way, in order to study the absorption of the Arsenio for same and its kinetic one. The analysis of the growth and the production of biomass, in short interval of time, (10 days), was carried through for four species of macrófitas in Hoagland solution (1/5 force iônioca): Spirodela intermedia, Lemna minuta, Salvinia auriculata and Mayacacia. The two first species had been selected by had presented better arched of growth In greenhouse with controlled luminosity and temperature, five gram of cool mass for amostral unit of the species Spirodela intermedia and Lemna minuta, had been cultivated in not transparent plastic pots in solution of Hoagland, na presença of Arsenio in the different concentration 1,5 mg/L-1, and in two pH: 5,5 and 7,0. The culture in the Arsenio absence was carried through in parallel, in same pH. Aliquot of 2 mL had been removed periodically of each vase in established times daily pay. The Arsenio text was analyzed in aliquot and the plants the after digestion, using Voltametria de Square shaped Onda on Mercury electrode. It was observed that the species Spirodela intemedia in pH 7,0 presented a bigger absorption of Arsênio.

ASSUNTO(S)

- - saneamento ambiental

ACESSO AO ARTIGO

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