Process related copper leaching during a combined wood preservation process

Treu, Andreas; Larnøy, Erik; Militz, Holger

doi:10.1007/s00107-010-0427-9

Cited by 12 publications

(14 citation statements)

References 5 publications

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“…The inability of solvent extraction to completely remove the oils indicates that they could potentially be used as immobilisation agents in combination with other treatments such as impregnation with wood preservatives and thereby reduce the amount of active component of the protective agent (Liibert et al 2011;Tomak et al 2011;Treu et al 2011). However, the motivation for using olive oil-based products in this study was to make the use of biocides unnecessary and utilise low-grade agricultural residues.…”

Section: Leachingmentioning

confidence: 99%

Utilisation of chemically modified lampante oil for wood protection

et al. 2018

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Within the Slovenian region of Istria, the olive growing and oil production industry is strong. This industry has a long history and the olives grown here have high levels of biologically active compounds including a variety of phenolic compounds. Using residual materials generated by this industry in potential wood protection systems would not only valorise low-value materials and stimulate rural economies but would also provide an alternative to currently used oil-based protection systems. The objective of this study was to produce an oil treatment for wood protection and assess its efficacy in reducing leaching, weathering effects, and fungal decay. Two maleinisation techniques were used to chemically modify low-value lampante oil in an attempt to limit leaching when impregnated in wood. Pinus sylvestris (Scots pine) and Fagus sylvatica (European beech) were treated with the modified oils and underwent leaching, accelerated weathering, and decay tests. Leaching of the treatment oils was relatively low compared with other experiments and beech wood specimens treated with a direct maleinisation treatment showed improvement in performance compared to control specimens. In addition, it was found that the modified oils were not completely removed from the wood after solvent extraction indicating that they could potentially be used as an immobilisation agent in combination with other treatments thereby reducing the amount of active component of the protective agent.

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Section: Leachingmentioning

confidence: 99%

Utilisation of chemically modified lampante oil for wood protection

et al. 2018

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“…Active ingredients contained in Tanalith E3492 are constituted of copper carbonate (20,5% w/w), propiconazole (0,23% w/w), tebuconazole (0,23% w/w) and boric acid (4,5% w/w). Such chromium free preservative systems have been proposed to substitute CCA formulations and constitute a model preservative easily quantifiable through copper analysis for our study (Temiz et al 2014, Treu et al 2011, Islam et al 2009). …”

Section: Treatment Chemicalmentioning

confidence: 99%

Evaluation of axial impregnation as an alternative to classical wood vacuum pressure impregnation method

Damay

Fredon

Gérardin

et al. 2015

Maderas, Cienc. tecnol.

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The evolution of laws on the use of biocide products has led to important changes in the field of wood preservation leading to an increasing interest for non "biocidal treatments" like thermal or chemical modifications. While thermal modifications become more and more common on industrial scale, development of chemical modifications progresses slowly. One reason for the challenges encountered is probably the difficulty to use actual vacuum pressure plant to impregnate wood with solutions of reactive chemicals aimed to react with or within the wood. In this context, the presented research focuses on a new alternative called axial impregnation, derived from Boucherie process, for impregnation of treatable non durable hardwood species. This process consists of low-pressure impregnation of green wood logs through its lower extremity with treatment solution transiting via natural pathways of vessels. In order to evaluate the feasibility of the method, logs of different hardwood species were impregnated with a copper based preservative solution and the distribution of copper within the wood was determined. Results indicated that treatable wood species like beech, hornbeam and birch can be easily and homogeneously treated using axial impregnation method, while ash known for its weak impregnability remained untreated.

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“…The chemical and physical methods were tested in this context. Lowering water uptake by treatment of wood surfaces by water repellants, polymers, and nanoparticles was one of the approaches ( H ä ger 1980 ;Cooper et al 1997 ;Cui and Walcheski 2000 ;Lebow et al 2003 ;Mourant et al 2009 ;Salma et al 2010 ;Sun et al 2010 ;Treu et al 2011 ;Pankras et al 2012 ). Thicker coatings and paints were also applied for this purpose (Stilwell 1998 ;Lebow et al 2004 ).…”

Section: Introductionmentioning

confidence: 97%

Reducing copper leaching from treated wood by sol-gel derived TiO₂ and SiO₂ depositions

Mahr¹,

Hübert²,

Stephan³

et al. 2012

Holzforschung

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The antileaching efficacy of sol-gel-derived TiO 2 -and SiO 2 -based precursors has been evaluated through laboratory leaching trials with pine sapwood in two different ways. In a one-step process, wood was vacuum impregnated by the precursor solutions containing CuCl 2 . The copper (Cu) emission rates of the sol-gel-based impregnated woods were up to 70 % lower than that of wood treated with pure CuCl 2 solution at the same level of concentration. More improvement (80 % ) could be achieved in a two-step process, in which sol-gel precursors were introduced into an already CuCl 2 -treated wood. The refinement was attributed to several effects. In the one-step approach, Cu was embedded in the TiO 2 / SiO 2 gels formed in the wood texture. During a twostep impregnation, gel layers that were formed in the wooden interior acted as an effective diffusion barrier. The sol-gel impregnations made wood more hydrophobic; therefore, the low amount of water that penetrated the cell wall was less efficient to leach out Cu.

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Process related copper leaching during a combined wood preservation process

Cited by 12 publications

References 5 publications

Utilisation of chemically modified lampante oil for wood protection

Utilisation of chemically modified lampante oil for wood protection

Evaluation of axial impregnation as an alternative to classical wood vacuum pressure impregnation method

Reducing copper leaching from treated wood by sol-gel derived TiO₂ and SiO₂ depositions

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Process related copper leaching during a combined wood preservation process

Cited by 12 publications

References 5 publications

Utilisation of chemically modified lampante oil for wood protection

Utilisation of chemically modified lampante oil for wood protection

Evaluation of axial impregnation as an alternative to classical wood vacuum pressure impregnation method

Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions

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Product

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Reducing copper leaching from treated wood by sol-gel derived TiO₂ and SiO₂ depositions