Fungal bioleaching of metals in preservative-treated wood

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Twenty-four brown-rot and 10 white-rot fungi were screened to evaluate their applicability for detoxification of preservative-treated wood impregnated with copper and chromium (CC) salts. Brown-rot fungi generally showed higher tolerance towards copper inhibition than white-rot fungi. Additionally, brown-rot fungi were found to accumulate considerable quantities of oxalic acid (up to 44.3 mM) in liquid medium, while white-rot fungi generally accumulated only traces of this organic acid. Oxalic acid is a strong organic acid capable of complexing a variety of heavy metals. Four Antrodia vaillantii and two Poria placenta brown-rot strains that displayed both a high copper tolerance and a high oxalic acid production were selected for further study. The brown-rot fungi effectively decayed wood containing up to 4.4% CC causing corrected mass losses of up to 24.3% in 4 weeks. Fungal treatment was also found to promote extensive leaching of chromium (up to 52.4%), but only moderate leaching of copper (15.6% or less). These results indicate the potential of solid-state fermentation with copper-tolerant fungi for the remediation of preservative-treated wood. Improving the solubility of copper will be an important challenge for future research.

Original languageEnglish (US)
Pages (from-to)798-804
Number of pages7
JournalProcess Biochemistry
Volume42
Issue number5
DOIs
StatePublished - May 2007

Fingerprint

Bioleaching
Fungi
Copper
Wood
Metals
Oxalic Acid
Oxalic acid
Chromium
Organic acids
Leaching
Antrodia
Poria
Detoxification
Acids
Heavy Metals
Remediation
Solubility
Fermentation
Placenta
Heavy metals

Keywords

  • Brown-rot fungi
  • Chromium
  • Copper
  • Copper tolerance
  • Fungal bioleaching
  • Oxalic acid
  • Preservative-treated timber
  • White-rot fungi

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry
  • Engineering (miscellaneous)
  • Industrial and Manufacturing Engineering

Cite this

Fungal bioleaching of metals in preservative-treated wood. / Sierra Alvarez, Maria Reye.

In: Process Biochemistry, Vol. 42, No. 5, 05.2007, p. 798-804.

Research output: Contribution to journalArticle

@article{ba77e6d449824428a4643c4d2a0829a7,
title = "Fungal bioleaching of metals in preservative-treated wood",
abstract = "Twenty-four brown-rot and 10 white-rot fungi were screened to evaluate their applicability for detoxification of preservative-treated wood impregnated with copper and chromium (CC) salts. Brown-rot fungi generally showed higher tolerance towards copper inhibition than white-rot fungi. Additionally, brown-rot fungi were found to accumulate considerable quantities of oxalic acid (up to 44.3 mM) in liquid medium, while white-rot fungi generally accumulated only traces of this organic acid. Oxalic acid is a strong organic acid capable of complexing a variety of heavy metals. Four Antrodia vaillantii and two Poria placenta brown-rot strains that displayed both a high copper tolerance and a high oxalic acid production were selected for further study. The brown-rot fungi effectively decayed wood containing up to 4.4{\%} CC causing corrected mass losses of up to 24.3{\%} in 4 weeks. Fungal treatment was also found to promote extensive leaching of chromium (up to 52.4{\%}), but only moderate leaching of copper (15.6{\%} or less). These results indicate the potential of solid-state fermentation with copper-tolerant fungi for the remediation of preservative-treated wood. Improving the solubility of copper will be an important challenge for future research.",
keywords = "Brown-rot fungi, Chromium, Copper, Copper tolerance, Fungal bioleaching, Oxalic acid, Preservative-treated timber, White-rot fungi",
author = "{Sierra Alvarez}, {Maria Reye}",
year = "2007",
month = "5",
doi = "10.1016/j.procbio.2007.01.019",
language = "English (US)",
volume = "42",
pages = "798--804",
journal = "Process Biochemistry",
issn = "0032-9592",
publisher = "Elsevier BV",
number = "5",

}

TY - JOUR

T1 - Fungal bioleaching of metals in preservative-treated wood

AU - Sierra Alvarez, Maria Reye

PY - 2007/5

Y1 - 2007/5

N2 - Twenty-four brown-rot and 10 white-rot fungi were screened to evaluate their applicability for detoxification of preservative-treated wood impregnated with copper and chromium (CC) salts. Brown-rot fungi generally showed higher tolerance towards copper inhibition than white-rot fungi. Additionally, brown-rot fungi were found to accumulate considerable quantities of oxalic acid (up to 44.3 mM) in liquid medium, while white-rot fungi generally accumulated only traces of this organic acid. Oxalic acid is a strong organic acid capable of complexing a variety of heavy metals. Four Antrodia vaillantii and two Poria placenta brown-rot strains that displayed both a high copper tolerance and a high oxalic acid production were selected for further study. The brown-rot fungi effectively decayed wood containing up to 4.4% CC causing corrected mass losses of up to 24.3% in 4 weeks. Fungal treatment was also found to promote extensive leaching of chromium (up to 52.4%), but only moderate leaching of copper (15.6% or less). These results indicate the potential of solid-state fermentation with copper-tolerant fungi for the remediation of preservative-treated wood. Improving the solubility of copper will be an important challenge for future research.

AB - Twenty-four brown-rot and 10 white-rot fungi were screened to evaluate their applicability for detoxification of preservative-treated wood impregnated with copper and chromium (CC) salts. Brown-rot fungi generally showed higher tolerance towards copper inhibition than white-rot fungi. Additionally, brown-rot fungi were found to accumulate considerable quantities of oxalic acid (up to 44.3 mM) in liquid medium, while white-rot fungi generally accumulated only traces of this organic acid. Oxalic acid is a strong organic acid capable of complexing a variety of heavy metals. Four Antrodia vaillantii and two Poria placenta brown-rot strains that displayed both a high copper tolerance and a high oxalic acid production were selected for further study. The brown-rot fungi effectively decayed wood containing up to 4.4% CC causing corrected mass losses of up to 24.3% in 4 weeks. Fungal treatment was also found to promote extensive leaching of chromium (up to 52.4%), but only moderate leaching of copper (15.6% or less). These results indicate the potential of solid-state fermentation with copper-tolerant fungi for the remediation of preservative-treated wood. Improving the solubility of copper will be an important challenge for future research.

KW - Brown-rot fungi

KW - Chromium

KW - Copper

KW - Copper tolerance

KW - Fungal bioleaching

KW - Oxalic acid

KW - Preservative-treated timber

KW - White-rot fungi

UR - http://www.scopus.com/inward/record.url?scp=34047116507&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34047116507&partnerID=8YFLogxK

U2 - 10.1016/j.procbio.2007.01.019

DO - 10.1016/j.procbio.2007.01.019

M3 - Article

AN - SCOPUS:34047116507

VL - 42

SP - 798

EP - 804

JO - Process Biochemistry

JF - Process Biochemistry

SN - 0032-9592

IS - 5

ER -