High-Density Polyethylene Membrane Containing Fe0 as a Contaminant Barrier
| Autor: | William A. Arnold, Edward L Cussler, Tsutomu Shimotori |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Chlorinated solvents Materials science Nanoparticle Polymer Polyethylene chemistry.chemical_compound Membrane chemistry Geomembrane Chemical engineering Carbon tetrachloride Environmental Chemistry Organic chemistry High-density polyethylene General Environmental Science Civil and Structural Engineering |
| Zdroj: | Journal of Environmental Engineering. 132:803-809 |
| ISSN: | 1943-7870 0733-9372 |
| DOI: | 10.1061/(asce)0733-9372(2006)132:7(803) |
| Popis: | To improve the performance of polymer-based containment barriers with respect to the breakthrough of chlorinated solvents, a high-density polyethylene (HDPE) membrane containing zero-valent iron ( Fe0 ) nanoparticles was developed as a reactive barrier. The performance of the reactive membrane was evaluated by challenging it with carbon tetrachloride in a diaphragm cell apparatus. In a Fe0 /HDPE system, reaction between carbon tetrachloride and Fe0 did not occur due to a lack of water in the polymer matrix. A glycerol-modified Fe0 /HDPE membrane successfully increased the lag time before breakthrough by 13–16 fold compared to HDPE alone. Calculations estimate that only 2.5–3.0% of the Fe0 initially present in the membrane reacted before breakthrough of carbon tetrachloride. Extrapolations of these results to practical situations with larger membrane thicknesses and lower contaminant concentrations predict lag times on the order of years. |
| Databáze: | OpenAIRE |
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