Proceedings - Teaching and Learning Centre - Simon Fraser ...
Proceedings - Teaching and Learning Centre - Simon Fraser ... Proceedings - Teaching and Learning Centre - Simon Fraser ...
Fraser River Action Plan 3rd Research Workshop % in Suspended Sediments % in Suspended Sediments PAH Phase Partitioning and Molecular Mass (mean values for Fraser River sites Oct.1992) 70 60 50 40 30 20 10 0 166 202 228 Increasing molecular weight 0 20 40 Acenaphth Fluorene Page 79 Phenanthr Fluoranthe Fluorene Phenanthene Anthracene Pyrene Fluoranthene Benz(a)anthracene Crysene PAH Phase Partitioning and TOC (Savona) Oct. 1992 (TOC = 4.9%) Feb. 1993 (TOC = 18.5%) Pyrene Chrysene
Fraser River Action Plan 3rd Research Workshop % in Suspended Sediments 0 25 50 75 100 Conclusions PAH Phase Partitioning and the Suspended Sediment Concentration (Yale) Oct. 1992 (SS = 226 mg/L) Feb. 1993 (SS = 2.1 mg/L) Fluorene Phenanthr Anthracene 1. Suspended sediments are a good indicator of contaminant levels in the aquatic environment, especially for those contaminants which are found at low concentrations in river water. 2. Although tetra-chlorinated dioxin and furan levels have decreased since 1990, chlorinated pulp mill contaminants are still detectable in the receiving environment. 3. Pulp mill contaminants and PAHs are higher in concentration during winter base flow conditions. 4. Site specific environmental factors such as the TOC and suspended sediment concentration appear to affect the phase partitioning of PAHs. Page 80 Fluoranthe Pyrene Benz(a)ant Crysene
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<strong>Fraser</strong> River Action Plan 3rd Research Workshop<br />
% in Suspended<br />
Sediments<br />
0 25 50 75 100<br />
Conclusions<br />
PAH Phase Partitioning <strong>and</strong> the Suspended<br />
Sediment Concentration (Yale)<br />
Oct. 1992 (SS = 226 mg/L)<br />
Feb. 1993 (SS = 2.1 mg/L)<br />
Fluorene<br />
Phenanthr<br />
Anthracene<br />
1. Suspended sediments are a good indicator of contaminant levels<br />
in the aquatic environment, especially for those contaminants which<br />
are found at low concentrations in river water.<br />
2. Although tetra-chlorinated dioxin <strong>and</strong> furan levels have decreased<br />
since 1990, chlorinated pulp mill contaminants are still detectable in the<br />
receiving environment.<br />
3. Pulp mill contaminants <strong>and</strong> PAHs are higher in concentration during<br />
winter base flow conditions.<br />
4. Site specific environmental factors such as the TOC <strong>and</strong> suspended<br />
sediment concentration appear to affect the phase partitioning of PAHs.<br />
Page 80<br />
Fluoranthe<br />
Pyrene<br />
Benz(a)ant<br />
Crysene
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