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Assessment of preservative migration from wood using a soil sachet method
Journal article   Peer reviewed

Assessment of preservative migration from wood using a soil sachet method

Matthew J Konkler and Jeffrey J Morrell
Environmental Science and Pollution Research, Vol.26(19), pp.19598-19605
2019
DOI: https://doi.org/10.1007/s11356-019-05289-6
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https://doi.org/10.1007/s11356-019-05289-6View
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Abstract

creosote ammoniacal copper zinc arsenate douglas-fir leaching environmental effects
The ability of standard soils to capture heavy metals or polycyclic aromatic hydrocarbons (PAHs) from ammoniacal copper zinc arsenate (ACZA)- or creosote-treated wood, respectively, was assessed using pressure-treated posts immersed in a freshwater pond. The soil, in heat-sealed, permeable plastic mesh sachets, was able to intercept copper, zinc, arsenic, and PAHs migrating from the posts. Chemical levels were much higher immediately adjacent to the posts and declined with distance from the posts. Metals were consistently detected around ACZA-treated posts, while 10 of the 16 EPA priority pollutants were detected in at least one sachet embedded around creosote-treated posts at each sampling point. These results were consistent with traditional sediment sampling methods. The primary advantages of the sachets were their consistency in terms of soil characteristics and the ease with which they could be retrieved from the pond. Further studies are planned to better understand the role of soil characteristics in the sachets on the ability to capture migrating preservatives.

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