Item – Theses Canada

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OCLC number
46528726
Author
Rubinstein, Edward M.,1970-
Title
Laboratory evaluation of factors affecting leaching and migration of CCA from pole sections.
Degree
M. Sc. -- University of Toronto, 1996
Publisher
Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 1996.
Description
2 microfiches.
Notes
Includes bibliographical references.
Abstract
Red pine pole sections, treated with a type C chromated-copper-arsenate solution and fixed under either ambient or high temperature/high humidity conditions, were placed in three different soil types and subjected to simulated rainfall delivered by a pump driven spray unit. Analysis of the leachate, after being allowed to pass through the soil, showed only concentrations of chromium to be significantly affected by fixation condition while soil type influenced only the levels of copper found in the leachate. A clear relationship between the length of time the poles were exposed to rainfall and the amounts of CCA leached could not be established. Levels of both chromium and copper were found to exceed the CCME criteria for freshwater life while arsenic concentrations were slightly above the standards for drinking water. Total amounts of CCA in the collected leachate, however, were far below those retained by the soil, the majority of which remained in a 0-2 cm annulus around and directly beneath the pole-sections as well as in the 0 to 5 cm depth range. Concentrations of all three elements within the soil were well below the CCME criteria for soil. CCA levels were generally found to be higher in the leaves and stems than the below ground edible portions of radishes that had been planted on soil exposed to the leaching procedure. There was some suggestion that those radishes grown directly adjacent to the pole-sections contained higher concentrations of CCA than those grown furthest away.
ISBN
0612127583
9780612127586