出版社：Korean Society of Environmental Health and Toxicology
摘要：A laboratory experiment was conducted to study the characteristics of leaching of Cr,Cu,and As from chromated copper arsenate (CCA)-treated wood. The wood species tested was hemlock spruce (10 cm x 10 em x 10 cm cube). The leaching experiment was conducted over 60 days using I L of leachants whose pHs were adjusted to 20,3.7,and 5.6,respectively with nitric acid,and also using lake water,according to the OECD guideline. Each leachate was analyzed for Cr and Cu using flame-AAS,and for As using vapor generation- AAS. Three metals were leached at the highest levels at pH 2.0 but almost at similar levels at the other conditions. Cumulative quantities over 60 days of a leaching period were in order of.As>Cu>Cr. As was predicted to leach with an increase in flux over a 10 year period,while Cr and Cu fluxes were predicted to decrease with time. This result sugests that arsenic can pose a health risk to humans over a long period of time,when CCA-treated wood is used for building filtis (e.g. playgrounds,residential purposes. etc.) with which humans frequently contact.
