TitleImprovements in pollutant monitoring: optimizing silicone for co-deployment with polyethylene passive sampling devices.
Publication TypeJournal Article
Year of Publication2014
AuthorsO'Connell, SG, McCartney, MA, L Paulik, B, Allan, SE, Tidwell, LG, Wilson, G, Anderson, KA
JournalEnviron Pollut
Date Published2014 Oct
KeywordsEnvironmental Monitoring, Polycyclic Aromatic Hydrocarbons, Polyethylene, Silicones, Water Pollutants, Chemical

Sequestering semi-polar compounds can be difficult with low-density polyethylene (LDPE), but those pollutants may be more efficiently absorbed using silicone. In this work, optimized methods for cleaning, infusing reference standards, and polymer extraction are reported along with field comparisons of several silicone materials for polycyclic aromatic hydrocarbons (PAHs) and pesticides. In a final field demonstration, the most optimal silicone material is coupled with LDPE in a large-scale study to examine PAHs in addition to oxygenated-PAHs (OPAHs) at a Superfund site. OPAHs exemplify a sensitive range of chemical properties to compare polymers (log Kow 0.2-5.3), and transformation products of commonly studied parent PAHs. On average, while polymer concentrations differed nearly 7-fold, water-calculated values were more similar (about 3.5-fold or less) for both PAHs (17) and OPAHs (7). Individual water concentrations of OPAHs differed dramatically between silicone and LDPE, highlighting the advantages of choosing appropriate polymers and optimized methods for pollutant monitoring.

Alternate JournalEnviron. Pollut.
PubMed ID25009960
PubMed Central IDPMC4140445
Grant ListR21 ES020120 / ES / NIEHS NIH HHS / United States
T32ES007060-32 / ES / NIEHS NIH HHS / United States
P42 ES016465 / ES / NIEHS NIH HHS / United States
T32 ES007060 / ES / NIEHS NIH HHS / United States
P30 ES000210 / ES / NIEHS NIH HHS / United States