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Showing 1 to 20 of 80 for “"Chemical Oxidation"”.
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Biological and Chemical Oxidation of Sulfidic Minerals at Alkaline pH
The oxidation of sulfidic minerals to liberate gold is currently performed with the utilization of microorganisms and chemical reagents. Biooxidation is a hydrometallurgical oxidation method which can be a pre-treatment method for gold recovery. Iron- and sulfur-oxidizing microorganisms with …
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Biodegradation and Chemical Oxidation of Recalcitrant Organic Contaminants during Water Reuse
… exhibit higher removal efficiency using Mn(VII) oxidation as compared to observed biodegradation rates in the batch studies, although the oxidation rate of PPCPs by Mn(VII) in natural water system is still uncertain.
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Removal of complexed iron by chemical oxidation and/or alum coagulation
… compounds was investigated as a function of both chemical oxidative and coagulation removal methods. Dissolved organic carbon (DOC) utilized in the studies was obtained from a variety of sources and included humic and fulvic acids, tannic acid and oxalic acid. Oxidants evaluated were potassium …
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Compatibility and effectiveness of polymer-enhanced chemical oxidation and reductive dechlorination groundwater remediation strategies
Includes bibliographical references (pages 167-176).
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Kinetics and Mechanisms of Adenovirus Type 2 Inactivation With Chemical Oxidation, Irradiation, and Photocatalysis Processes
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.
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Comparative evaluation of potassium permanganate and catalyzed hydrogen peroxide during in situ chemical oxidation of DNAPLs
Includes bibliographical references (pages 105-113).
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Experimental evaluation of mass transfer and matrix interactions during in situ chemical oxidation relying on diffusive transport
Includes bibliographical references (pages 93-97).
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Removal of soluble iron and manganese from groundwater by chemical oxidation and oxide-coated multi-media filtration
… for removing soluble manganese by adsorption and oxidation onto the surface of manganese oxide-coated media, and (2) to develop mathematical models to predict the removal of soluble manganese both in the presence and absence of free chlorine. Results from a pilot-scale experiment in Columbus, …
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Investigation of Color Removal by Chemical Oxidation for Three Reactive Textile Dyes and Spent Textile Dye Wastewater
… Institute (ADMI) units. The effects of the three chemical oxidation treatments provided color reduction for all three dyes. The results suggested UV/H₂O₂ and UV/ClO₂2 treatments provided maximum color reduction of the red and blue dyes, and UV/H₂O₂ was the most effective for maximum reduction of …
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Critical analysis of the field scale application of in situ chemical oxidation for the remediation of contaminated groundwater
Includes bibliographical references.
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An investigation into the mechanism of bioleaching of a predominantly-chalcopyrite concentrate with mesophiles
… is a complex process in which bacterial and chemical oxidation processes occur simultaneously. Recent studies has provided convincing evidence that the bioleaching of pyrite occurs via a two-step mechanism (Boon, 1996).
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The analysis of salt resistant surfactants used in enhanced oil recovery.
… developed.In the last section of this thesis the chemical oxidation of NPEOS used Fenton's reagent and biological oxidation of NPEOS using a microorganism (Paracoccus halodenitrificans) is reported. The intermediate products formed in the chemical oxidation have been identified and characterized …
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Nanoporous monolayer graphene membranes for water purification : from concept to realization
… pores through ion bombardment followed by chemical oxidation, and 3) seal leaks in the composite membrane by covering intrinsic graphene defects with hafnium oxide via atomic layer deposition and large cracks with an impermeable polymer through interfacial polymerization. We found the …
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Degradation of gasoline oxygenates in the subsurface
… ETBE and possibly MTBE. Addition of H₂O₂, caused chemical oxidation of MTBE and ETBE. The chemical oxidation was faster in the organically rich soils, but slower in the organic-poor soils. Soil microorganisms were able to catalyze the cleavage of the ether bond in ETBE but not MTBE. This …
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A Preliminary Investigation of Physical-Chemical Treatment of Slagging Gasifier Aqueous Effluent
… slagging gasifier wastewater by physical-chemical means was studied. Pretreatment and treatment flow schemes were developed by using batch and continuous tests. Results were based mainly on wastewater residual total organic carbon (TOC). A treatment facility was designed and economically …
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The minor theaflavins of black tea
… of theaflavins and related compounds under chemical oxidation conditions. The results clearly showed the importance of size (galloylation of flavan-3-ol at the 3 position on the C-ring) and configuration (2,3-cis vs 2,3-trans) of the flavan-3-ol precursors in determining the yields of these …
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Characterisation of unresolved complex mixtures of hydrocarbons
… response. Further analyses were performed by chemical ionisation-MS (CI-MS), probe distillation EI-MS, field ionisation-MS (FIMS), and elemental analysis; yet the information provided by each was limited to a few "average, molecular types. In view of the limitations of conventional methods of …
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Combining chemical with biological oxidation for efficient treatment of chloronitrobenzene in groundwater
… immediate remedial approaches, such as advanced oxidation processes (AOPs). While AOPs are effective for the removal of many organic contaminants from water, these techniques are often costly, especially when complete mineralization is the goal. In this study, it was hypothesized that chemical …
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Structure-Function Relationships in Poly(3-hexylthiophene)s Formed via Manipulation of Oxidative Coupling Routes
… effects that the experimental conditions during chemical oxidation using iron(III) chloride as an oxidant impart on the structure of the resulting polymers. Poly(3-alkylthiophene)s are extensively studied materials due to their high electrical conductivities and unique optical properties that …
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