Determination of polyoxymethylene (POM) – water partition coefficients for oxy-PAHs and PAHs.
- Resource Type
- Article
- Authors
- Josefsson, Sarah; Arp, Hans Peter H.; Kleja, Dan Berggren; Enell, Anja; Lundstedt, Staffan
- Source
- Chemosphere. Jan2015, Vol. 119, p1268-1274. 7p.
- Subject
- *POLYOXYMETHYLENE
*PARTITION coefficient (Chemistry)
*WATER pollution
*POLYCYCLIC aromatic hydrocarbons
*WATER chemistry
- Language
- ISSN
- 0045-6535
Oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) are a class of ubiquitously occurring pollutants of which little is known. They can be co-emitted with PAHs or formed from PAHs in the environment. The environmental fate and risk of oxy-PAHs are difficult to assess due to a lack of methods to quantify their pore water concentrations. One sampler that can be used to determine freely dissolved concentrations of organic contaminants is polyoxymethylene (POM). In this study, POM – water partition coefficients ( K POM ) were determined for 11 oxy-PAHs. K POM values of 8 PAHs with similar hydrophobicities as the oxy-PAHs were determined for comparison. Results showed that log K POM values ranged from 2.64 to 4.82 for the PAHs (2–4 rings), similar to previously determined values. Log K POM values for investigated oxy-PAHs ranged from 0.96 to 5.36. The addition of carbonylic oxygen on a parent PAH generally lowered K POM by 0.5 to 1.0 log units, which is attributable to the presence of carbonylic oxygens increasing water solubility. The K POM values presented here will facilitate simultaneous assessments of freely dissolved water concentrations of oxy-PAHs and PAHs in environmental media. [ABSTRACT FROM AUTHOR]