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@ -4,7 +4,7 @@ date: 2018-07-31
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cardImage: library
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draft: false
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featured: false
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type: poster
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medium: poster
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authors:
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- Thomas A. Christensen II
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- Jonathan Counts
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@ -21,12 +21,12 @@ microorganisms to perform this remediation. Polyvinylalginate (PVA) shows
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promise as a useful shield for microorganisms carrying out bioremediation of TCE
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by surrounding them in a protective biofilm-like layer, however, key information
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is missing which relates diffusion of TCE or its metabolic products through PVA.
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To measure the effective diffusion coefficient of H{{< sup "+" >}} ions through a PVA membrane
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cross-linked with boric acid and calcium ions, we used a modified diaphragm
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cell. We found the effective diffusion coefficient to be 1.40 × 10{{< sup -5 >}}
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± 1.91 × 10{{<sup -6 >}} cm{{< sup 2 >}}s, a nearly seven-fold decrease in
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diffusivity compared to protons in water, with an unexpected significant but as
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of yet unquantified adsorption capacity. These results suggest that
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polyvinylalginate is effective in slowing diffusion of protons and buffering
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these acids produced by trichloroethylene metabolism, and remains suitable for
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encapsulation of microorganisms involved in bioremediation.
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To measure the effective diffusion coefficient of H{{< sup "+" >}} ions through
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a PVA membrane cross-linked with boric acid and calcium ions, we used a modified
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diaphragm cell. We found the effective diffusion coefficient to be 1.40 ×
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10{{< sup -5 >}} ± 1.91 × 10{{<sup -6 >}} cm{{< sup 2 >}}s, a nearly
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seven-fold decrease in diffusivity compared to protons in water, with an
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unexpected significant but as of yet unquantified adsorption capacity. These
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results suggest that polyvinylalginate is effective in slowing diffusion of
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protons and buffering these acids produced by trichloroethylene metabolism, and
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remains suitable for encapsulation of microorganisms involved in bioremediation.
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