Determination of polyoxymethylene (POM) – water partition coefficients for oxy-PAHs and PAHs. (January 2015)

• Record Type: Journal Article
• Authors: Josefsson, Sarah; Arp, Hans Peter H.; Kleja, Dan Berggren; Enell, Anja; Lundstedt, Staffan
• Is Part Of: Chemosphere. Volume 119(2015)
• Page Start: 1268
• Page End: 1274
• Publication Date: 2015-01
• Subjects: Oxy-PAHs -- PAHs -- Pore water concentrations -- Passive samplers -- Polyoxymethylene; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2014.09.102
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract : Graphical abstract: Highlights: POM – water partition coefficients ( K POM ) were determined for 11 oxy-PAHs. 28 d was sufficient to reach steady state in K POM . Oxy-PAH K POM were lower than for parent PAHs but higher than for PAHs of similar K OW . The method can be applied for bioavailability assessments of oxy-PAHs. Abstract: 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.