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EVALUATION OF MEMBRANE TYPE FOR USE IN DIFFUSION SAMPLERS TO MONITOR GROUND WATER QUALITY
Citation:
DILLINGHAM, M., C. J. PAUL, AND R. T. WILKIN. EVALUATION OF MEMBRANE TYPE FOR USE IN DIFFUSION SAMPLERS TO MONITOR GROUND WATER QUALITY. Presented at University of Central Oklahoma, Edmond, OK, November 11, 2005.
Impact/Purpose:
To inform the public.
Description:
The Discrete Multi-Level Sampler (DMLS®) system has proven to be a useful tool for obtaining discrete interval contaminant concentrations at hazardous waste sites. The DMLS® utilizes dialysis cells, which consist of a polypropylene vial, covered on both ends by a permeable membrane. In this study, two membrane materials, Supor and Versapor, were used to evaluate diffusion rates of different contaminants at three concentrations (10, 100, and 1000 ppm) across the membranes. Diffusion rates were determined for eight time periods (from 1hr to 275hrs). Alkalinity, pH, conductivity, and temperature were recorded for each sample. The diffusion rate across both membranes was compared for each of the contaminants and concentrations. Results of this study will aid researchers in determining the appropriate equilibration time and membrane to use at certain contaminated sites.