tral irradiance through the effects of climate change on catchment vegetation and the export of colored dissolved organic material. (Pienitz, R.; Vincent, W. "Effect of Climate Change Relative to Ozone Depletion on UV Exposure in Subarctic Lakes", Nature 2000, 404 (6777), 484-487)
Health Indoor contaminants. Indoor air quality measurements were carried out during three concerts and one ice hockey game in three different halls with possible health effects inflicted by exposure based on measured concentrations of various contaminants. (Junker, M., et al., "An Assessment of Indoor Air Contaminants in Buildings With Recreational Activity", Sci. Total Environ. 2000,246 (2-3), 139-152)
Mercury speciation The methylation of mercury occurs mainly in anoxic waters and is believed to be generally mediated by sulfate-reducing bacteria. Understanding factors controlling mercury methylation consequently requires understanding mercury bioavailability in such systems and mercury solubility and chemical speciation in sulfidic waters. J. Jay and co-workers quantified a large increase in the solubility of cinnabar (HgS(s)) in the presence of elemental sulfur, particularly at high pH. They propose that the complex Hg(S ) 2~ dominates the speciation of Hqlll) in such waters At lower sulfide concentrations and at high pH the data are best fitted by considering also the formation of the species HgS OH" Octanol-water distribution (D ) firm the charged nature of the rinm
Soils
inant
Metal speciation. Three inactive railway yards in Montreal were sampled to investigate the speciation and bioavailability of Cd, Cu, Ni, Pb, and Zn, with results indicating that in these urban soils, trace metals were in stable forms, and bioavailability was extremely low. (Ge, Y., et al. "Trace Metal Speciation and Bioavailability in Urban Soils", Environ. Pollut. 2000 107 (1), 137-144)
siich as HgS (Envimn
Tests Steel production dust. The relationship of the leachability of six Canadian electric arc furnace dusts in four leaching tests to their mineralogy is discussed. (Stegemann, J. A., et al. "Understanding Environmental Leachability of Electric Arc Furnace Dust", /. Environ. Eng. 2000, 126 (2), 112-120) Testing aquatic systems. This article summarizes chapters of a 1996 Society of Environmental Toxicology and Chemistry-sponsored workshop and provides a literature review of links between whole effluent toxicity testing and associated field biomonitoring. (La Point, T. W.; Waller, W. T.
"Field Assessments in Conjunction
mercury-po.lyst]lfirJp comn m s e r i c e of a
minor lipophilic nnlysulfirip nnl
