Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"passive sampler"”.
-
Assessment of a Passive Sampler for Aquifer Microbial Community Profiling and Comparison of Porous Media
… fashion. With this goal, we developed a passive sampler that employs removable cartridges containing solid media designed to re-create the aquifer environment in a controlled fashion and support consistent, repeatable, time-series sampling. A bench-scale, continuous-loop study compared …
-
Benchtop testing of polyethylene passive sampling towards a quantitative analysis of volatile organic compounds (VOCs) in soil vapours
The feasibility of polyethylene (PE) as a passive sampler for quantitative analysis of volatile organic compounds (VOCs) was analysed in this work by means of a benchtop testing. A benchtop physical model was setup, which consisted of a jar of glass beads or sand, containing a known mass of toluene …
-
Can polyethylene passive samplers be used to measure infiltration?
… including groundwater seepage. Polyethylene passive samplers have been used extensively to measure a chemical's concentration in the sediment or water column and conventional seepage meters are deployed to infer the infiltration flux. A model was developed to describe how passive samplers …
-
Demonstrating the feasibility of polyethylene passive samplers for quantitative assessment of volatile organic compounds in soil
… by the successful use of polyethylene (PE) passive samplers in sediments, this research focused on demonstrating the feasibility of PE samplers to accurately assess volatile organic compounds in soil vapors. Experimental values of PE-water partitioning coefficients (Kpew) for benzene, …
-
The science behind Tenax extractable concentrations and their use in evaluating environmental risk
… by organic carbon alone. Desorption-based samplers, such as single-point Tenax extractions (SPTE), provide a clearer estimate of bioaccessibility than organic carbon normalization by serving as a sink for desorbing compound for the length of the extraction. In this way, SPTEs account for …
-
Quantitative analysis of volatile organic compounds (VOCs) in soil via passive sampling : polyethylene sampler design and optimization
… still limited. A polyethylene (PE) quantitative passive sampler using performance reference compounds and deployed via a hand driven probe is proposed as a solution. Additionally, a 1D diffusion mass transfer model was developed in MATLAB to predict the mass uptake into the PE sampler over time. …
-
Investigation of polyethlyene passive samplers' efficacy in deducing sediment pore water concentrations of PCBs
… measurement of pore water concentrations. PE passive samplers are an inexpensive, fast alternative to liquid-liquid extraction of pore waters and sediment extraction with equilibrium partitioning. To demonstrate the potential of PE passive samplers to measure sediment pore water …
-
Using Polar Organic Chemical Integrated Sampler (POCIS) to monitor pesticide fluxes in Alpine streams
… been proposed over the past 20 years based on passive samplers, including the Polar Organic Chemical Integrative Sampler (POCIS). POCIS is a simple and robust passive sampler, composed of a receiving phase enclosed between two polymeric membrane sheets, like an Oasis HLB phase and by two …