<?xml version="1.0" encoding="utf-8" standalone="yes"?><feed xmlns="http://www.w3.org/2005/Atom"><generator uri="https://gohugo.io" version="0.141.0">Hugo v0.141.0</generator><id>https://millironx.millironx.page/@indiewebpub/tags/bioremediation/</id><link rel="self" type="application/atom+xml" href="https://millironx.millironx.page/@indiewebpub/tags/bioremediation/feed.xml"/><link rel="alternate" type="text/html" href="https://millironx.millironx.page/@indiewebpub/tags/bioremediation/"/><updated>2025-03-31T00:14:19+00:00</updated><title>All content tagged "bioremediation" on Milliron X</title><entry><id>https://millironx.millironx.page/@indiewebpub/academia/thesis/</id><link rel="alternate" href="https://www.proquest.com/dissertations-theses/polyoxometalate-incorporation-effects-on-proton/docview/2502214356/se-2"/><title>Polyoxometalate Incorporation and Effects on Proton Transport in Hydrogel Polymers</title><published>2020-08-07T00:00:00+00:00</published><updated>2020-08-07T00:00:00+00:00</updated><author><name>Thomas A. Christensen II</name><uri>https://millironx.millironx.page/@indiewebpub/people/thomas-a.-christensen-ii/</uri></author><category term="thesis"/><category term="bioremediation"/><category term="polyoxometalate"/><category term="hydrogel polymers"/><category term="proton transport"/><category term="chemical engineering"/><summary type="text">
Polyoxometalate clusters embedded into hydrogel biobeads may be able to solve the challenges posed by free proton generation during remediation of trichloroethylene by acting as buffers and reducing protons to hydrogen gas. In this thesis, the challenges posed by systems that contain both diffusion and reaction processes for protons are considered mathematically, and a computer simulation to was developed to prove the relationship between diaphragm cell lag period and reactive capabilities of membranes. Two polyoxometalate compounds, sodium decavanadate and alumina sulfate, were successfully incorporated into a poly(vinyl alcohol) hydrogel membrane, and the diffusivity changes associated with each compound was determined. It was found that the diffusivity of protons through an unmodified 10% w/v poly(vinyl alcohol) membrane was 1.76 × 10-5 cm2 s-1 , the diffusivity through a 10%/2% w/w/v poly(vinyl alcohol)/sodium decavanadate membrane was 3.10 × 10-6 cm2 s-1 , and the diffusivity through a 10%/2% w/w/v poly(vinyl alcohol)/alumina sulfate membrane was 3.32 × 10-7 cm2 s-1 . Through analysis of the diaphragm cell lag period, it was found the incorporation of sodium decavanadate did not increase the reactivity of a poly(vinyl alcohol) hydrogel, and incorporation of alumina sulfate lowered the reactivity. These results indicate that polyoxometalate integration into hydrogel membranes is feasible, but does not provide any advantage to a bioremediation scenario.</summary><content type="html" xml:lang="en" xml:base="https://millironx.millironx.page/@indiewebpub/">
&lt;p>Polyoxometalate clusters embedded into hydrogel biobeads may be able to solve
the challenges posed by free proton generation during remediation of
trichloroethylene by acting as buffers and reducing protons to hydrogen gas. In
this thesis, the challenges posed by systems that contain both diffusion and
reaction processes for protons are considered mathematically, and a computer
simulation to was developed to prove the relationship between diaphragm cell lag
period and reactive capabilities of membranes. Two polyoxometalate compounds,
sodium decavanadate and alumina sulfate, were successfully incorporated into a
poly(vinyl alcohol) hydrogel membrane, and the diffusivity changes associated
with each compound was determined. It was found that the diffusivity of protons
through an unmodified 10% w/v poly(vinyl alcohol) membrane was 1.76 ×
10&lt;sup>-5&lt;/sup>
 cm&lt;sup>2&lt;/sup>
 s&lt;sup>-1&lt;/sup>
, the diffusivity through a
10%/2% w/w/v poly(vinyl alcohol)/sodium decavanadate membrane was 3.10 ×
10&lt;sup>-6&lt;/sup>
 cm&lt;sup>2&lt;/sup>
 s&lt;sup>-1&lt;/sup>
, and the diffusivity through a
10%/2% w/w/v poly(vinyl alcohol)/alumina sulfate membrane was 3.32 ×
10&lt;sup>-7&lt;/sup>
 cm&lt;sup>2&lt;/sup>
 s&lt;sup>-1&lt;/sup>
. Through analysis of the
diaphragm cell lag period, it was found the incorporation of sodium decavanadate
did not increase the reactivity of a poly(vinyl alcohol) hydrogel, and
incorporation of alumina sulfate lowered the reactivity. These results indicate
that polyoxometalate integration into hydrogel membranes is feasible, but does
not provide any advantage to a bioremediation scenario.&lt;/p>
</content></entry><entry><id>https://millironx.millironx.page/@indiewebpub/academia/pva-aiche/</id><link rel="alternate" href="/academia/pva-aiche/measuring_diffusion_of_trichloroethylene.pdf"/><title>Measuring Diffusion of Trichlorethylene Breakdown Products in Polyvinylalginate</title><published>2018-10-29T00:00:00+00:00</published><updated>2018-10-29T00:00:00+00:00</updated><author><name>Thomas A. Christensen II</name><uri>https://millironx.millironx.page/@indiewebpub/people/thomas-a.-christensen-ii/</uri></author><author><name>Samuel R. Wolfe</name><uri>https://millironx.millironx.page/@indiewebpub/people/samuel-r.-wolfe/</uri></author><author><name>Jonathan Counts</name><uri>https://millironx.millironx.page/@indiewebpub/people/jonathan-counts/</uri></author><author><name>Mark F. Roll</name><uri>https://millironx.millironx.page/@indiewebpub/people/mark-f.-roll/</uri></author><author><name>Kristopher v. Waynant</name><uri>https://millironx.millironx.page/@indiewebpub/people/kristopher-v.-waynant/</uri></author><author><name>James G. Moberly</name><uri>https://millironx.millironx.page/@indiewebpub/people/james-g.-moberly/</uri></author><category term="poster"/><category term="bioremediation"/><category term="polyoxometalate"/><category term="hydrogel polymers"/><category term="proton transport"/><category term="chemical engineering"/><summary type="text">
Trichloroethylene (TCE), a toxic and carcinogenic contaminant, presents unique challenges for cleanup because of its water solubility, density, and volatility. Bioremediation of TCE is a promising cleanup method; however, metabolism of TCE results in acid generation that inhibits remediating microorganisms. Calcium alginate(CA)-polyvinylalcohol (PVA) hydrogels show promise for protecting remediating microbes, however diffusion of TCE or its byproducts through these polymers is unknown. To measure the effective diffusion coefficient of TCE and byproducts through hydrogel membranes, we used a modified diaphragm cell. Measured effective diffusion coefficient of each species was (cm 2 /s × 106 ): 14.0 ± 1.91 for H+ ions, 12.4 ± 1.64 for TCE, 7.83 ± 0.54 for cis-1,2-dichloroethylene (DCE), and 4.68 ± 4.14 for vinyl chloride. These results aid in engineering biobeads and suggest that CA-PVA hydrogel blends are effective in slowing diffusion of protons, buffering acids produced by trichloroethylene metabolism, and remains suitable for encapsulation of microorganisms involved in bioremediation.</summary><content type="html" xml:lang="en" xml:base="https://millironx.millironx.page/@indiewebpub/">
&lt;p>Trichloroethylene (TCE), a toxic and carcinogenic contaminant, presents unique
challenges for cleanup because of its water solubility, density, and volatility.
Bioremediation of TCE is a promising cleanup method; however, metabolism of TCE
results in acid generation that inhibits remediating microorganisms. Calcium
alginate(CA)-polyvinylalcohol (PVA) hydrogels show promise for protecting
remediating microbes, however diffusion of TCE or its byproducts through these
polymers is unknown. To measure the effective diffusion coefficient of TCE and
byproducts through hydrogel membranes, we used a modified diaphragm cell.
Measured effective diffusion coefficient of each species was (cm &lt;sup>2&lt;/sup>
/s
× 10&lt;sup>6&lt;/sup>
): 14.0 ± 1.91 for H&lt;sup>&amp;#43;&lt;/sup>
 ions, 12.4 ± 1.64 for TCE,
7.83 ± 0.54 for cis-1,2-dichloroethylene (DCE), and 4.68 ± 4.14 for vinyl
chloride. These results aid in engineering biobeads and suggest that CA-PVA
hydrogel blends are effective in slowing diffusion of protons, buffering acids
produced by trichloroethylene metabolism, and remains suitable for encapsulation
of microorganisms involved in bioremediation.&lt;/p>
</content></entry></feed>