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Filtering by: Subject Iron -- Absorption and adsorption Remove constraint Subject: Iron -- Absorption and adsorption Decade 2010-2019 Remove constraint Decade: 2010-2019

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  • Persistence of aromatic compounds in soils and sediments : a molecular perspective

    Creator:
    Keiluweit, Marco
    Abstract:
    This thesis explores open questions regarding molecular forms and interactions of natural and synthetic aromatic compounds present in soils and sediments. Plant biomass-derived black carbon (biochar) generated through incomplete natural and anthropogenic combustion processes is a major source of aromaticity in terrestrial ecosystems. Chapter one represents a detailed account of...
    Resource Type:
    Masters Thesis
    Full Text:
    -based Near-edge X-ray Absorption Fine Structure (NEXAFS), and Fourier transform infrared (FT-IR

  • The assessment of copper and zinc removal from highway stormwater runoff using Apatite II™

    Creator:
    Huang, Hsiao-Wen
    Abstract:
    Copper and zinc are heavy metals commonly present in highway stormwater runoff. Discharge of these metals to surface waters inhabited by sensitive aquatic species including threatened and endangered salmonids has necessitated the need for improved treatment techniques. Although copper is of the greater toxicological concern, zinc is often present at...
    Resource Type:
    Masters Thesis
    Full Text:
    zinc was likely due to a combination of processes including adsorption, ion exchange and

  • Quantifying nisin adsorption behavior at pendant polyethylene oxide brush layers

    Creator:
    Dill, Justen K.
    Abstract:
    A more quantitative understanding of peptide loading and release from polyethylene oxide (PEO) brush layers will provide direction for development of new strategies for drug storage and delivery. The antimicrobial peptide nisin shows potent activity against Gram-positive bacteria including the most prevalent implant-associated pathogens, its mechanism of action minimizes the...
    Resource Type:
    Masters Thesis
    Full Text:
    adsorption-elution experiments with nisin, at uncoated and PEO-coated surfaces. PEO layers were prepared by

  • An investigation of chitosan for sorption of radionuclides

    Creator:
    Holfeltz, Vanessa Elaine
    Abstract:
    Chitosan is a biopolymer resulting from the deacetylation of chitin, the second most abundant biopolymer in nature. Chitosan has been successfully used in systems to remove metal ions and other pollutants from wastewater. Chitosan has shown promise as a sorbent for radionuclides in some aqueous waste streams. The sorption of...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 TABLE OF CONTENTS (Continued) Page 3.6 Modeling of adsorption kinetics and isotherms

  • A microchannel-based thermal management system for hydrogen storage adsorbent beds

    Creator:
    Steigleder, Leif J.
    Abstract:
    Hydrogen has been shown to be a promising replacement for fossil fuels for use in light duty vehicles because it is a clean, renewable and plentiful resource with a high gravimetric energy density. However, in order to obtain an acceptable volumetric energy density, densification of the hydrogen is required. Adsorptive...
    Resource Type:
    Masters Thesis
    Full Text:
    is that the adsorption process generates heat and optimal storage conditions are at temperatures

  • Synthesis and evaluation of PEO-coated materials for microchannel-based hemodialysis

    Creator:
    Heintz, Keely
    Abstract:
    The marked increase in surface-to-volume ratio associated with microscale devices for hemodialysis leads to problems with hemocompatibility and blood flow distribution that are more challenging to manage than those encountered at the conventional scale. In this work, stable surface modifications with pendant polyethylene oxide (PEO) chains were produced on polycarbonate...
    Resource Type:
    Masters Thesis
    Full Text:
    microchannel and membrane materials. Protein adsorption was detected by measurement of surface-bound enzyme

  • Molecular origins of surfactant-mediated stabilization of protein

    Creator:
    Lee, Hyo Jin
    Abstract:
    Nonionic surfactants are commonly used to stabilize proteins during upstream and downstream processing and drug formulation. Surfactants stabilize the proteins through two major mechanisms: (i) their preferential location at nearby interfaces, in this way precluding protein adsorption; and/or (ii) their association with protein into "complexes" that prevent proteins from interacting...
    Resource Type:
    Dissertation
    Full Text:
    and PS 80) will occur with surfactants that stabilize protein mainly by their own adsorption at

  • Retention of protein repulsive character and antimicrobial activity of PEO brush layers following nisin entrapment

    Creator:
    Auxier, Julie A.
    Abstract:
    Nisin, an amphiphilic, antimicrobial peptide, has been shown to integrate into the hydrophobic inner region of poly(ethylene oxide) (PEO) brush layers; however, the presence of integrated nisin may compromise the protein repulsive character of the PEO layer. In particular, the introduction of fibrinogen to nisin-loaded brush layers has been observed...
    Resource Type:
    Masters Thesis
    Full Text:
    uncoated surfaces following nisin, fibrinogen, and/or buffer challenges; and evaluation of adsorption and

  • Fabrication of precipitation-hardened aluminum microchannel cooling plates for adsorption-based hydrogen storage systems

    Creator:
    Pawar, Supriya V.
    Abstract:
    The need for clean and renewable fuel such as hydrogen is driven by a growing worldwide population and increasing air pollution from fossil fuels. One of the major barriers for the use of hydrogen in automotive industry is the storage of hydrogen. Physisorption is the most promising storage technique due...
    Resource Type:
    Masters Thesis
    Full Text:
    area of the material and the temperature. [9, 14] The adsorption of hydrogen molecules is directly

  • Enhancement and modeling of cryogenic solid-state hydrogen storage systems with a novel microchannel thermal management device

    Creator:
    Loeb, Christopher S.
    Abstract:
    Compact storage systems demonstrating increased hydrogen storage capacity are the key to advancing the growth of the hydrogen economy throughout the world and reducing the global dependence on fossil fuels for transportation. The use of highly porous adsorbent materials for reversible hydrogen storage is a promising pathway towards achieving storage...
    Resource Type:
    Dissertation
    Full Text:
    is the enhancement of solid-state hydrogen adsorption systems through the development and inclusion