Journal
ENVIRONMENTAL POLLUTION
Volume 193, Issue -, Pages 71-78Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.06.019
Keywords
Polyethylene; Silicone; Passive sampling; PAHs; OPAHs; Oxygenated-PAHs; Pesticides
Categories
Funding
- associated Analytical Chemistry Facility Core
- National Institute of Environmental Health Sciences [P30 ES000210, R21 ES020120]
- OSU Food Safety and Environmental Stewardship Program
- NIEHS from the National Institutes of Health [T32ES007060-32]
- [P42 ES016465]
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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 K-ow 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. (C) 2014 Elsevier Ltd. All rights reserved.
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