Estimating dermal transfer of copper particles from the surfaces of pressure-treated lumber and implications for exposure

The Science of the Total Environment
William E PlattenTodd Peter Luxton

Abstract

Lumber pressure-treated with micronized copper was examined for the release of copper and copper micro/nanoparticles using a surface wipe method to simulate dermal transfer. In 2003, the wood industry began replacing CCA treated lumber products for residential use with copper based formulations. Micronized copper (nano to micron sized particles) has become the preferred treatment formulation. There is a lack of information on the release of copper, the fate of the particles during dermal contact, and the copper exposure level to children from hand-to-mouth transfer. For the current study, three treated lumber products, two micronized copper and one ionic copper, were purchased from commercial retailers. The boards were left to weather outdoors for approximately 1year. Over the year time period, hand wipe samples were collected periodically to determine copper transfer from the wood surfaces. The two micronized formulations and the ionic formulation released similar levels of total copper. The amount of copper released was high initially, but decreased to a constant level (~1.5mgm(-2)) after the first month of outdoor exposure. Copper particles were identified on the sampling cloths during the first two months of the experiment,...Continue Reading

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Citations

Oct 27, 2017·Environmental Toxicology and Chemistry·Kay T HoRobert M Burgess
Jul 20, 2018·Environmental Toxicology and Chemistry·Ashley N ParksRobert M Burgess
Nov 30, 2016·Journal of Nanobiotechnology·Chiara CivardiFrancis W M R Schwarze
Apr 28, 2017·The Science of the Total Environment·Jennifer L GriggsKaren D Bradham
Mar 25, 2019·The Science of the Total Environment·Justin G ClarTodd P Luxton
Jun 18, 2021·The Science of the Total Environment·Sydney B ThorntonJustin G Clar

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