AI Article Synopsis
- The study examined the loss of deuterated polycyclic aromatic hydrocarbons (PAHs) as performance reference compounds in semipermeable membrane devices at fifteen coastal sites in Norway to investigate photodegradation.
- Unusual dissipation profiles, particularly for samplers located less than 5 meters below the water surface, suggest significant photodegradation of these compounds.
- The findings highlight the importance of accounting for photodegradation, especially in passive sampling applications near the water surface or in Arctic environments, as it can notably affect the measured concentrations of PAHs.
Article Abstract
Losses of deuterated polycyclic aromatic hydrocarbons (PAHs) used as performance reference compounds (PRCs) in semipermeable membrane devices deployed at fifteen coastal sampling sites near Harstad harbour in Northern Norway were used to investigate photodegradation of these photosensitive compounds. Unusual PRC dissipation profiles, especially for samplers exposed <5m below the water surface are indicative of photodegradation. A strong correlation between loss rates for d12-chrysene and d12-benzo[e]pyrene with consistently higher losses of the latter was found. The observed photodegradation rates may be sufficiently high to impact PAH masses absorbed by a factor of two. This study demonstrates that photodegradation during exposure of passive water samplers needs to be taken into account, particularly with deployments close to the water surface, when using SPMD canisters, or when sampling in the Arctic.
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| http://dx.doi.org/10.1016/j.marpolbul.2016.02.018 | DOI Listing |
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