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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
18/08/2008 |
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Data da última atualização: |
07/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GONZALEZ, M. H.; ARAÚJO, G. C. L.; PELIZARO, C. B.; MENEZES, E. A.; LEMOS, S. G.; SOUZA, G. B. de; NOGUEIRA, A. R. de A. |
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Afiliação: |
MARIO HENRIQUE GONZALES, UFSCar/SÃO CARLOS, SP.; GEÓRGIA C. L. ARAÚJO, USP; CLAÚDIA B. PELIZARO, UFSCar/SÃO CARLOS, SP.; EVELINE A. MENEZES, UFSCar/SÃO CARLOS, SP.; SHERLAN G. LEMOS, UFSCar/SÃO CARLOS, SP.; GILBERTO BATISTA DE SOUZA, CPPSE; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Coconut coir as biosorbent for Cr(VI) removal from laboratory wastewater. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Journal of Hazardous Materials, v. 159, n. 2-3, p. 252-256, nov. 2008. |
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DOI: |
10.1016/j.jhazmat.2008.02.014 |
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Idioma: |
Inglês |
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Conteúdo: |
A high cost-effective treatment of sulphochromic waste is proposed employing a raw coconut coir asbiosorbent for Cr(VI) removal. The ideal pH and sorption kinetic, sorption capacities, and sorption sites were the studied biosorbent parameters. After testing five different isotherm models with standard solutions, Redlich?Peterson and Toth best fitted the experimental data, obtaining a theoretical Cr(VI) sorption capacity (SC) of 6.3mgg-1. Acid?base potentiometric titration indicated around of 73% of sorption sites were from phenolic compounds, probably lignin. Differences between sorption sites in the coconut coir before and after Cr adsorption identified fromFourier transform infrared spectra suggested a modification of sorption sites after sulphochromic waste treatment, indicating that the sorption mechanism involves organic matter oxidation and chromium uptake. For sulphocromic waste treatment, the SC was improved to 26.8±0.2mgg-1, and no adsorbed Cr(VI) was reduced, remaining only Cr(III) in the final solution. The adsorbed materialwas calcinated to obtain Cr2O3, with a reduction of more than 60% of the original mass. |
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Palavras-Chave: |
Coconut coir; Cr; Sulphochromic wasterwater treatment. |
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Thesaurus Nal: |
biosorption. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 01906naa a2200253 a 4500
001 1048501
005 2023-03-07
008 2008 bl uuuu u00u1 u #d
024 7 $a10.1016/j.jhazmat.2008.02.014$2DOI
100 1 $aGONZALEZ, M. H.
245 $aCoconut coir as biosorbent for Cr(VI) removal from laboratory wastewater.$h[electronic resource]
260 $c2008
520 $aA high cost-effective treatment of sulphochromic waste is proposed employing a raw coconut coir asbiosorbent for Cr(VI) removal. The ideal pH and sorption kinetic, sorption capacities, and sorption sites were the studied biosorbent parameters. After testing five different isotherm models with standard solutions, Redlich?Peterson and Toth best fitted the experimental data, obtaining a theoretical Cr(VI) sorption capacity (SC) of 6.3mgg-1. Acid?base potentiometric titration indicated around of 73% of sorption sites were from phenolic compounds, probably lignin. Differences between sorption sites in the coconut coir before and after Cr adsorption identified fromFourier transform infrared spectra suggested a modification of sorption sites after sulphochromic waste treatment, indicating that the sorption mechanism involves organic matter oxidation and chromium uptake. For sulphocromic waste treatment, the SC was improved to 26.8±0.2mgg-1, and no adsorbed Cr(VI) was reduced, remaining only Cr(III) in the final solution. The adsorbed materialwas calcinated to obtain Cr2O3, with a reduction of more than 60% of the original mass.
650 $abiosorption
653 $aCoconut coir
653 $aCr
653 $aSulphochromic wasterwater treatment
700 1 $aARAÚJO, G. C. L.
700 1 $aPELIZARO, C. B.
700 1 $aMENEZES, E. A.
700 1 $aLEMOS, S. G.
700 1 $aSOUZA, G. B. de
700 1 $aNOGUEIRA, A. R. de A.
773 $tJournal of Hazardous Materials$gv. 159, n. 2-3, p. 252-256, nov. 2008.
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