biossorção de cobre, manganês e cádmio por biomassas de saprolegnia subterranea (dissmann) r.l. seym. e pythium torulosum coker & p. patt. (oomycetes) copper, manganese and cadmium biosorption by saprolegnia subterranea (dissmann) r.l. seym. and pythium torulosum coker & p. patt. (oomycetes) biomass

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ID: 229453
2008
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Abstract
As biomassas secas dos fungos zoospóricos Saprolegnia subterranea e Pythium torulosum foram avaliadas quanto a biossorção de cobre, manganês e cádmio de soluções aquosas por meio da determinação dos índices "q" (mg de metal adsorvido por g de biomassa) e "R%" (remoção percentual). Os mais elevados índices q foram obtidos quando as biomassas foram colocadas em contato com elevadas concentrações de metais, enquanto que os maiores índices R% foram obtidos em condições de baixas concentrações (p<0,05). Comparativamente, a biomassa de S. subterranea SPC 1244 superou as demais quanto a biossorção de cobre (q = 7,48 mg/g; R% = 49,03), a biomassa de P. torulosum SPC 1425 foi a melhor em relação a biossorção de manganês (q = 4,13 mg/g; R% = 26,71), enquanto que a biomassa de S. subterranea SPC 1431 foi superior em relação a biossorção de cádmio (q = 6,75 mg/g; R% = 42,26). Este é o primeiro relato sobre a biossorção de cobre, manganês e cádmio por biomassas destes fungos zoospóricos, indicando a potencialidade de removerem íons de soluções diluídas.
Dried biomass of the zoosporic fungi Saprolegnia subterranea and Pythium torulosum was evaluated for copper, manganese and cadmium biosorption from aqueous solutions using the "q" (mg of adsorbed metal per g of biomass) and the "R%" (percent removal) indices. The highest q values were observed when the biomass was placed in contact with high metal concentrations, whereas the highest R% values were observed at low concentrations (p<0.05). S. subterranea SPC 1244 biomass surpassed the others for copper biosorption (q = 7.48 mg/g; R% = 49.03), P. torulosum SPC 1425 biomass was the best for manganese biosorption (q = 4.13 mg/g; R% = 26.71), and S. subterranea SPC 1431 biomass was the best for cadmium biosorption (q = 6.75 mg/g; R% = 42.26). This is the first report on copper, manganese and cadmium biosorption by the biomass of these zoosporic fungi, indicating the potential to remove ions from diluted solutions.
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Authors ;José Ivanildo de Souza;Iracema Helena Schoenlein-Crusius;Carmen Lídia Amorin Pires-Zottarelli;Norberto Carlos Schoenlein
Journal monatshefte für chemie chemical monthly
Year 2008
DOI
10.1590/S0102-33062008000100021
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000100021
Keywords
heavy metals biosorption oomycetes

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