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Showing 1 to 20 of 154 for “"Fe(III)"”.
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An investigation into the precipitation of Fe(III) oxyhydroxides in lime neutralization processes
… which is dominated by iron, necessitates an effective treatment protocol. The tendency of iron to precipitate as a sludge has drawn attention to the mechanisms and the associated kinetics of Fe(III) oxyhydroxide precipitation and the post precipitation solidliquid separation processes within …
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The effects of Fe(III) reduction on biodegradation of fuel oxygenates and chlorinated ethenes
… contaminants prevalent in groundwater systems. Fe(III) reducing conditions are dominant in many sedimentary environments. However, the effects of Fe(III) reduction on biotransformation of MTBE/TBA and chlorinated ethenes are not well understood. This research investigated the biodegradation of …
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Parameters influencing the concentration of aqueous tin in acidic sulphate solutions containing Fe(III
… tin in acidic sulphate solutions containing Fe(III/II) as they arise in the Reduction Releach process at Teck Cominco Trail Operations (TCML). This study documents the impact of initial sulphuric acid and As(V) concentrations, temperature, and lead concentrate reductant amount on tin …
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Kinetics of the Fe(III) initiated decomposition of hydrogen peroxide : experimental and model results
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
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Thermodynamics of the partition of oxine and its Ni(II) and Fe(III) chelates
The effects of temperature on the first and second acid dissociation constants of 8-hydroquinoline (oxine) have been measured and the following thermodynamic values assigned to solutions of 0.1M strength. For the process, H₂Ox⁺ ⇋ H⁺ + HOx at 25°C., pK₁ = 5.103, ΔH = 5.7 kcal/mole, and ΔS° = -4 e.u. …
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Development of solution-phase extreme ultraviolet spectroscopy and photophysics of μ-oxo-bridged Fe(III)porphyrins
… transient spectrum of a liquid sheet containing FeTPPCl could be collected with a reasonable signal to noise ratio. However, it is found that the liquid sheet of an iron monoporphyrin was unstable in the XUV sample chamber under high vacuum conditions. The transient M-edge absorption spectroscopy …
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The effects of PVP(FE(III)) catalyst and polymer molecular weight on gene delivery via biodegradable crosslinked polyethylenimine
… the immunogenicity and oncogenity of viruses. Safe and efficient alternative gene delivery vehicles are needed to implement gene therapy in clinical practice. Polymeric vectors are an attractive option due to their availability, simple chemistry, and low toxicity and immunogenicity. Our group has …
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Towards a fragment approach to haemozoin inhibiting antimalarials : exploration of coordination and π-stacking interactions with Fe(III)PPIX by spectroscopy and synthesis
… of coordination and π-stacking interactions with ferriprotoporphyrin IX (Fe(III)PPIX) using a fragment approach was undertaken in order to propose and synthesise novel compounds which followed a hypothesised mechanism of action to inhibit β-haematin formation. Coordination of a series of …
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A Multifunctional Solution Composed Of TMPyP, 1,5-DHN, And Fe(III) Ions That Produces Reactive Oxygen Species (ROS) In Aerobic, Anaerobic, And H2O2 Environments
… a multifunctional solution that is comprised of Fe(III) ions, cationic meso-tetra(N-methyl-4-pyridyl)porphine tetrachloride (TMPyP), and 1,5-dihydroxynapthalene (1,5-DHN), was shown to produce reactive oxygen species (ROS) such as singlet oxygen (<sup>1</sup>O<sub>2</sub>) or hydroxyl radicals …
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Production of Light-independent Reactive Oxygen Species during Microbially-mediated Fe(II)/Fe(III) redox cycling and its Application in the Degradation of Organic Contaminants
… in aquatic systems. In the presence of Fe(II), H2O2 represents a potential source of •OH via the Fenton reaction, which is commonly used in remediation for organic contaminant degradation. The degradation of various organic contaminants during aerobic oxidation of Fe(II) species without …
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Encapsulation of iron(III) protoporphyrin IX and tetraphenylporphyrin in metal-organic frameworks for application as heterogeneous oxidation catalysts
… investigated as potential hosts to encapsulate Fe(III) protoporphyrin IX (ferrihaem = Fe(III)PPIX) and Fe(III) tetraphenylporphyrin (Fe(III)TPP). Methyl orange (MO) adsorption was used as an initial model for substrate uptake in MOFs 1 and 2. MOF 1 showed good adsorption of MO (10.3 ± 0.8 mg.g-1 …
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Interactions of ferriprotoporphyrin IX with neutral lipids and detergents: insights into their role in β-haematin formation
… which is catabolised to amino acids and ferriprotoporphyrin (Fe(III)PPIX), that it subsequently detoxifies to form the bio crystal, haemozoin. Neutral lipids have been implicated as the biological molecules responsible for the nucleation of haemozoin in vivo, though their exact role is …
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Arsenic mobilization through bioreduction of iron oxide nanoparticles
Arsenic sorbs strongly to the surfaces of Fe(III) (hydr)oxides. Under aerobic conditions, oxygen acts as the terminal electron acceptor in microbial respiration and Fe(III) (hydr)oxides are highly insoluble, thus arsenic remains associated with Fe(III) (hydr)oxide phases. However, under anaerobic …
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Abschätzung der mikrobiellen Diversität in anoxisch sauren Sedimenten von Braunkohle-Restseen unter Berücksichtigung des Eisenschwefelkreislaufs
… im oberen Bereich bei 3 und steigt mit der Tiefe auf Werte von 5,5-6 an. Anhand des pH-Verlaufs wurde das Sediment in die Zonen I bis IV unterteilt. In Zonen I und III konnte eine spontane Fe(II)ges.-Freisetzung beobachtet werden, wobei diese in Zone I abhängig vom pH-Wert war. Diese konnte …
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Understanding the factors which Influence the interactions of iron (II) and iron (III) in porphyrins and the chemistry of silicon phthalocyanine
… thesis involved the study of iron(II) and iron(III) porphyrins using high-pressure Mössbauer spectroscopy. Further work was aimed at the formation of a new complex between iron(III) tetraphenylporphyrin chloride [Fe(III)TPPCl] and silicon phthalocyanine di-4pyridinecarboxylic acid …
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The Ferrous Regeneration Process for Use in Alternate Anode Reaction Technology in Copper Hydrometallurgy
The Fe(II) regeneration process is an important aspect of Alternate Anode Reaction Technology (AART) using Fe(II)/Fe(III)-SO2 reactions for copper hydrometallurgy; however little has been done to study it specifically. The process regenerates Fe(II) via Fe(III) reduction by SO2(aq), catalyzed by …
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