Biological oxidation of sulfur compounds in artificially degraded wood

Albelda-Berenguer, Magdalena; Monachon, Mathilde; Jacquet, Clémentine; Junier, Pilar; Rémazeilles, C.; Schofield, Eleanor J.; Joseph, Edith

doi:10.1016/j.ibiod.2018.06.009

Cited by 13 publications

(19 citation statements)

References 48 publications

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“…Indeed, the fresh wood samples showed ratios in the range 1.00-1.50 while ratios of archaeological wood (oak and pine) displayed lower ratio values (0.80-1.00). Previous studies of modelling waterlogged wood have demonstrated that these ratios decreased after artificial contamination of the fresh samples [14]. This is also observed here, with ratios of NT samples being lower than the ratios of fresh balsa, oak and pine wood species.…”

Section: Atr-ftir Spectroscopysupporting

confidence: 87%

“…Regarding the degradation criterion, none of the extraction methods enhanced wood degradation suggesting that they all guarantee the preservation of waterlogged wood objects. Previous study has already demonstrated that T. denitrificans was harmless for wood substrate [14]. Iron extraction with siderophores as first extraction step did not interfere with the substrate neither.…”

Section: Atr-ftir Spectroscopymentioning

confidence: 81%

“…All samples were stored in degassed deionized water as stock solution. Sets A1, A2, B, C, E and F were artificially contaminated with iron and sulfur species according to the protocol described in Albelda-Berenguer et al [14]. The purpose of this impregnation is to form iron sulfides compounds such as mackinawite (FeS) and/or pyrite (FeS 2 ).…”

Section: Wood Samplesmentioning

confidence: 99%

“…It occurs frequently in marine environments but could also occur on sweet water finds. Several important wooden cultural heritage artefacts such as the Vasa warship in Sweden or the Mary Rose in United Kingdom present acidification and salt precipitation issues and require a long-term monitoring [14].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, T. denitrificans, a facultative anaerobe bacterium, can employ nitrate NO 3 − as electron donor to oxidize sulfur compounds at neutral pH. Several case studies showed its faculty to dissolve iron sulfide compounds [14,21]:…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Bio-Based Extraction Methods by Spectroscopic Methods

et al. 2020

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New technologies are in development regarding the preservation of waterlogged archaeological wood items contaminated with Fe/S species. To this purpose, a bio-based treatment to extract these harmful species before further damages occur is presented. Thiobacillus denitrificans and desferoxamine were employed based on their specific properties to solubilize iron sulfides and uptake iron. The biological treatment was compared with oxidizing and complexing agents (sodium persulfate and ethylene diamine tetraacetate) traditionally used in conservation-restoration. Mock-ups of fresh balsa as well as fresh and archeological oak and pinewood were prepared to simulate degraded waterlogged wood by immersion in corrosive Fe/S solutions. The efficiency of both biological and chemical extraction methods was evaluated through ATR-FTIR and Raman spectroscopies and validated by statistical approach. Results showed that treatments did not affect the wood composition, meaning that no wood degradation was induced. However, the chemical method tended to bleach the samples and after treatment, reduced sulfur species were still identified by Raman analyses. Finally, statistical approaches allowed validating ATR-FTIR results.

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Section: Atr-ftir Spectroscopysupporting

confidence: 87%

Section: Atr-ftir Spectroscopymentioning

confidence: 81%

Section: Wood Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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