Effect of climatic variables on chromated copper arsenate (CCA) leaching during above-ground exposure
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James L. Taylor
Abstract
Until recently, most research on the leaching of preservatives from treated wood was conducted in the laboratory. Although these studies have contributed to the understanding of leaching, the data generated under controlled conditions often do not apply to leaching during natural exposure and weathering. In addition, little is known about the effects of climatic variables and long-term emission rates. This paper examines leaching of chromated copper arsenate (CCA) from lumber exposed above ground to 685 mm of precipitationduring 351 days of natural weathering. Stepwise multiple regression analysis revealed relationships between leaching and a number of treatment and climatic variables, including: species of wood, initial preservative loading, amount of precipitation, average air temperature, average light intensity, pH and duration of rain event. Regression models explained approximately 30% of the variation in chromium and arsenic leaching and 44% of the variation in copper leaching.
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Articles in the same Issue
- Chemical changes in silver birch (Betula pendula Roth) wood caused by hydrogen peroxide bleaching and monitored by color measurement (CIELab) and UV-Vis, FTIR and UVRR spectroscopy
- Hydrophobisation and densification of wood by different chemical treatments
- Functionalisation of wood by reaction with 3-isocyanatopropyltriethoxysilane: Grafting and hydrolysis of the triethoxysilane end groups
- Isolation and fractionation of lignosulfonates by amine extraction and ultrafiltration: A comparative study
- Bioactive phenolic substances in industrially important tree species. Part 4: Identification of two new 7-hydroxy divanillyl butyrolactol lignans in some spruce, fir, and pine species
- Characterization of physiological functions of sapwood IV: Formation and accumulation of lignans in sapwood of Cryptomeria japonica (L.f.) D. Don after felling
- X-ray scattering studies of thermally modified Scots pine (Pinus sylvestris L.)
- Differences in acoustic velocity by resonance and transit-time methods in an anisotropic laminated wood medium
- Parallel-plate rheology of latex films bonded to wood
- An assessment of the feasibility of ultrasound as a defect detector in lumber
- Vibrational properties of green wood in high-temperature water vapor
- The stiffness modulus in Norway spruce as a function of year ring
- Strain analysis in bulk forming of wood
- Decay fungi from playground wood products in service using 28S rDNA sequence analysis
- Effect of climatic variables on chromated copper arsenate (CCA) leaching during above-ground exposure
- Protic ionic liquids with organic anion as wood preservative
