Analysis of 15 polycyclic aromatic hydrocarbons in creosote-contaminated water and sediments by HPLC-fluorescence detector
Conference
·
OSTI ID:367456
- Univ. of Guelph, Ontario (Canada)
- Canada Centre for Inland Waters, Burlington, Ontario (Canada)
Experimental design, sampling, sample preservation, extraction with a minimum cleanup procedure and subsequent quantification of 15 priority PAHs as a result of an introduction of creosote to mesocosms are presented. Creosote introduction to the mesocosms reflects two major types of creosote contamination in the aquatic environment: (1) leaching from creosote-impregnated pilings, and (2) introduction of pure creosote to aquatic environments in a spill event, and subsequent contamination of sediments by creosote. Doses for the creosote-impregnated pilings study consisted of seven levels with mesocosms containing 1 to 8 piling each, and doses for the liquid creosote study consisted of a logarithmic nominal concentration gradient from 0.3 to 300 ppm creosote. The creosote-impregnated pilings study revealed that the concentration of PAHs in the water column increased steadily with time, reaching maximum levels 7 days post-treatment, and declining thereafter. The liquid creosote study revealed that the high initial post-treatment concentration of PAHs decreased exponentially with time. The sediment data from the creosote-impregnated pilings study showed that the total amount of 15 PAHs ranged from 0.6 to 2 {micro}g/g of dry weight, while the sediment data from the liquid creosote study showed that the total amount of 15 PAHs were much higher than the pilings study, i.e.: ranging from 0.6 to 400 {micro}g/g dry weight at four weeks post-treatment. PAHs with higher molecular weight (5 and 6 aromatic ring structures) were present at very low to nondetectable concentrations in the water column; and significantly higher levels in the sediments.
- OSTI ID:
- 367456
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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