Release and transformation of nanoparticle additives from surface coatings on pristine & weathered pressure treated lumber.

The Science of the Total Environment
Sydney B ThorntonJustin G Clar

Abstract

As the market for "nano-enabled" products (NEPs) continues to expand in commercial and industrial applications, there is a critical need to understand conditions that promote release of nanomaterials and their degradation products from NEPs. Moreover, these studies must aim to quantify both the abundance and form (aggregates, ions, hybrids, etc.) of material released from NEPs to produce reasonable estimates of human and environmental exposure. In this work ZnO nanoparticles (NPs), a common additive in NEP surface coatings, were dispersed in Milli-Q water and a commercially available wood stain before application to pristine and weathered (outdoor 1 year) micronized copper azole pressure treated lumber (MCA). Coated lumber surfaces were sampled consecutively eight times using a method developed by the Consumer Product Safety Commission (CPSC) to track potential human exposure to ZnO NPs and byproducts through simulated dermal contact. Surprisingly, the highest total release of Zn was observed from aged lumber coated with ZnO NPs dispersed in wood stain, releasing 233 ± 26 mg Zn/m2 over the course of all sampling events. Alternatively, separate leaching experiments using a synthetic precipitation solution to simulate environment...Continue Reading

References

Jun 22, 2005·Journal of Synchrotron Radiation·B Ravel, M Newville
Jul 14, 2010·Environmental Pollution·Ralf KaegiMichael Burkhardt
Dec 23, 2014·Nano Today·Nasim AnnabiAli Khademhosseini
Feb 2, 2016·The Science of the Total Environment·William E PlattenTodd Peter Luxton
Dec 20, 2016·Current Opinion in Biotechnology·Mary EleftheriadouPhilip Demokritou
Mar 11, 2019·The Science of the Total Environment·Ronald S LankoneD Howard Fairbrother
Mar 25, 2019·The Science of the Total Environment·Justin G ClarTodd P Luxton

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Citations

Jun 18, 2021·The Science of the Total Environment·Sydney B ThorntonJustin G Clar

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