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NANOFIBER-ENABLED, MULTI-TARGET PASSIVE SAMPLING DEVICE FOR DETERMINATION OF THE FREELY-DISSOLVED SEDIMENT PORE WATER CONCENTRATIONS OF ORGANIC CONTAMINANTS
Martinez, A. and D.M. Cwiertny.
SERDP Project ER-2543, 63 pp, 2016
A suite of electrospun nanofiber mats (ENMs) was fabricated as next-generation multi-target passive samplers to test their sorption capacities for a set of hydrophilic (aniline and nitrobenzene) and hydrophobic compounds (PCBs and dioxin). The average diameter of the ENMs ranged from 70 (PET) to 1,000 (EVA) nm, with a relative standard deviation of less than 50% for each material. In water the ENMs yielded a fast equilibration time (<3 days) for the tested compounds. The ENM-water partition coefficient (KENM-w) for the hydrophilic compounds ranged from 0.72 to 2.8 log units. The KENM-w for hydrophobic compounds ranged from 3.2 to 6.4 log units. Collectively, the rates and KENM-w measured for the best performing ENMs often exceeded partition coefficients achieved with commercially available passive sampling materials (e.g., low-density polyethylene and PDMS glass fiber), particularly for hydrophilic compounds. https://www.estcp.com/content/download/40977/391652/file/ER-2543%20Final%20Report.pdf
SERDP Project ER-2543, 63 pp, 2016
A suite of electrospun nanofiber mats (ENMs) was fabricated as next-generation multi-target passive samplers to test their sorption capacities for a set of hydrophilic (aniline and nitrobenzene) and hydrophobic compounds (PCBs and dioxin). The average diameter of the ENMs ranged from 70 (PET) to 1,000 (EVA) nm, with a relative standard deviation of less than 50% for each material. In water the ENMs yielded a fast equilibration time (<3 days) for the tested compounds. The ENM-water partition coefficient (KENM-w) for the hydrophilic compounds ranged from 0.72 to 2.8 log units. The KENM-w for hydrophobic compounds ranged from 3.2 to 6.4 log units. Collectively, the rates and KENM-w measured for the best performing ENMs often exceeded partition coefficients achieved with commercially available passive sampling materials (e.g., low-density polyethylene and PDMS glass fiber), particularly for hydrophilic compounds. https://www.estcp.com/content/download/40977/391652/file/ER-2543%20Final
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