EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum

To degrade wood, brown rot fungi (BRF) have developed a mechanism based on low molar mass iron reducing compounds that promote Fenton reaction. These compounds, also solubilise Fe(III), in conjunction with oxalic acid, making it available for reaction. It have been postulated that the humic acids pa...

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Autores principales:	POZO,C, CONTRERAS,D, FREER,J, RODRÍGUEZ,J
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2010
Materias:	Brown rot Wood biodegradation Humic acid Oxalic acid Gloeophyllum trabeum
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400005
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spelling	oai:scielo:S0717-970720100004000052011-05-25EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeumPOZO,CCONTRERAS,DFREER,JRODRÍGUEZ,J Brown rot Wood biodegradation Humic acid Oxalic acid Gloeophyllum trabeum To degrade wood, brown rot fungi (BRF) have developed a mechanism based on low molar mass iron reducing compounds that promote Fenton reaction. These compounds, also solubilise Fe(III), in conjunction with oxalic acid, making it available for reaction. It have been postulated that the humic acids participates on wood biodegradation by BRF, acting in a similar way that the fungal compounds. In this work this effect and its interaction with oxalic acid were evaluated. The effect of humic acid and oxalic acid on the biodegradation of radiata pine chips by the BRF Gloeophyllum trabeum was evaluated using a two level factorial design. Absence or concentrations of 5 g/L and 0.05 M for humic acid and oxalic acid respectively, were evaluated; temperature (25°C) and initial pH (5.0) were kept constant. The responses were mass loss, holocellulose content and viscosity, measured after 30 days of biodegradation. The effects of the variables were determined using standardized coefficients of the polynomial equation, which were obtained through a multiple linear regression. All experiments were performed in quadruplicate and the obtained model was validated through an ANOVA test with a confidence interval of 95%. Oxalic acid was the factor that has a greater effect on these variables; it was able to extract metals from wood and to inhibit biodegradation when used without further treatment of humic acid. Humic acid impregnation increases the metal content in wood, but did not stimulate the wood biodegradation.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.55 n.4 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400005en10.4067/S0717-97072010000400005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Brown rot Wood biodegradation Humic acid Oxalic acid Gloeophyllum trabeum
spellingShingle	Brown rot Wood biodegradation Humic acid Oxalic acid Gloeophyllum trabeum POZO,C CONTRERAS,D FREER,J RODRÍGUEZ,J EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
description	To degrade wood, brown rot fungi (BRF) have developed a mechanism based on low molar mass iron reducing compounds that promote Fenton reaction. These compounds, also solubilise Fe(III), in conjunction with oxalic acid, making it available for reaction. It have been postulated that the humic acids participates on wood biodegradation by BRF, acting in a similar way that the fungal compounds. In this work this effect and its interaction with oxalic acid were evaluated. The effect of humic acid and oxalic acid on the biodegradation of radiata pine chips by the BRF Gloeophyllum trabeum was evaluated using a two level factorial design. Absence or concentrations of 5 g/L and 0.05 M for humic acid and oxalic acid respectively, were evaluated; temperature (25°C) and initial pH (5.0) were kept constant. The responses were mass loss, holocellulose content and viscosity, measured after 30 days of biodegradation. The effects of the variables were determined using standardized coefficients of the polynomial equation, which were obtained through a multiple linear regression. All experiments were performed in quadruplicate and the obtained model was validated through an ANOVA test with a confidence interval of 95%. Oxalic acid was the factor that has a greater effect on these variables; it was able to extract metals from wood and to inhibit biodegradation when used without further treatment of humic acid. Humic acid impregnation increases the metal content in wood, but did not stimulate the wood biodegradation.
author	POZO,C CONTRERAS,D FREER,J RODRÍGUEZ,J
author_facet	POZO,C CONTRERAS,D FREER,J RODRÍGUEZ,J
author_sort	POZO,C
title	EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
title_short	EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
title_full	EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
title_fullStr	EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
title_full_unstemmed	EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum
title_sort	effects of humic and oxalic acid in wood biodegradation by gloeophyllum trabeum
publisher	Sociedad Chilena de Química
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000400005
work_keys_str_mv	AT pozoc effectsofhumicandoxalicacidinwoodbiodegradationbygloeophyllumtrabeum AT contrerasd effectsofhumicandoxalicacidinwoodbiodegradationbygloeophyllumtrabeum AT freerj effectsofhumicandoxalicacidinwoodbiodegradationbygloeophyllumtrabeum AT rodriguezj effectsofhumicandoxalicacidinwoodbiodegradationbygloeophyllumtrabeum
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EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum

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