کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4414969 1307732 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polymer selection for passive sampling: A comparison of critical properties
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Polymer selection for passive sampling: A comparison of critical properties
چکیده انگلیسی

Next to the bi-phasic semipermeable membrane devices (SPMDs), single-phase passive samplers are becoming more popular for the sampling of hydrophobic contaminants. We therefore evaluated some critical properties of 13 polymers: low-density polyethylene (LDPE), polyoxymethylene (POM), silicone rubbers (SRs), including polydimethylsiloxane, and ethylene/octene co-polymer (EXACT). Polymer comparison included four critical properties: release of oligomers, swelling in solvents (dichloromethane, hexane, ethyl acetate, acetone and methanol), contaminant diffusion coefficients and partition coefficients for naphthalene, fluoranthene, benzo[a]pyrene and dibenz[a,h]anthracene. Amounts of extracted oligomers ranged from 2% to 4% for SRs and LDPE, to about 1% for EXACT. No oligomer release was observed for POM. Diffusion coefficients were higher in all SRs compared with LDPE and EXACT. No measurable diffusion was observed in POM after 24 h of exposure. Differences in polymer–water partition coefficients spanned two orders of magnitude, with the lowest values observed for POM and the highest values observed for LDPE and EXACT. For the ten tested SRs, this range was less than 0.4 log units. Transport resistances estimated on the basis of diffusion coefficients and partition coefficients were generally lower for SRs than for LDPE and EXACT.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 68, Issue 7, July 2007, Pages 1344–1351
نویسندگان
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