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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Dissolution of iron oxide in aqueous solutions of sulphur dioxide

Monhemius, Andrew John January 1966 (has links)
A study has been made of the dissolution of naturally occurring α-iron oxide hydrate in acidified aqueous solutions of sulphur dioxide at 110°C. The dissolution was found to be independent of acidity at low concentrations of sulphur dioxide and inversely dependent on acidity at higher concentrations of sulphur dioxide. Both homogeneous and heterogeneous control of the reaction was observed. The addition of cupric ion to the system catalysed the rate. Dissolution is thought to occur via hydration of the oxide surface and subsequent reaction of undissociated sulphurous acid at the surface to form a ferric-sulphite complex. The rate determining step is considered to be the desorption of the complex from the surface. A limited study of the direct dissolution of iron oxide hydrate in sulphuric and perchloric acids at temperatures between 120 and 150°C is included. Under these conditions, the hydrated oxide surface is thought to undergo anion exchange during dissolution. Work carried out on the preparation and identification of the isomeric α- and γ-iron oxide hydrates is reported. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate
12

Precipitate flotation of colloidal ferric oxide.

Fung, David Tat-Fai. January 1972 (has links)
No description available.
13

The thermal chemistry of colloids II the heat of coagulation of ferric oxide hydrosol with electrolytes /

Browne, Frederick L. January 1921 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1921. / Typescript. With this is bound: The heat of coagulation of ferric oxide hydrosol with electrolytes / By Frederick Lincoln Browne and J. Howard Matthews. Reprinted from Journal of the American Chemical Society, vol. XLIII, no. 11 (Nov. 1921), p. [2336]-2352. Includes bibliographical references.
14

The so-called adsorption of ferric oxide hydrosol by charcoal ...

Le Compte, Thomas Robert, January 1926 (has links)
Thesis (Ph. D.)--Columbia University, 1927. / Vita.
15

Synthesis of iron oxide nanoparticles in a counterflow diffusion flame reactor

Ruiz, Hector Enrique, January 2008 (has links) (PDF)
Thesis (M.S.)--Missouri University of Science and Technology, 2008. / Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 24, 2009) Includes bibliographical references (p. 68-69).
16

Continuous Hydrothermal Production of Iron Oxide (Fe[subscript 2]0[subscript 3]) and Cobalt Oxide (Co[subscript 3]O[subscript 4])

Hao, Yalin 05 1900 (has links)
No description available.
17

Synthesis, modeling, and optimization of iron oxide nanoparticles for magnetic fluid hyperthermia /

Gonzales-Weyhmiller, Marcela. January 2007 (has links)
Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (p. 129-135).
18

Oxide nanoparticles and nanostructured coatings by wet chemical processing

Shi, Jingyu. January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Available online via OhioLINK's ETD Center; full text release delayed at author's request until 2007 May 23
19

In-situ morphological study of wustite scale growth in a hot stage environment SEM /

Lee, Moonyong January 1986 (has links)
No description available.
20

Spectrophotometric determination of aluminium oxide, calcium oxide and iron (III) oxide in Portland cement.

January 1993 (has links)
Shu King-hung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1993. / Includes bibliographical references (leaves 80-81). / ABSTRACT --- p.1 / Chapter CHAPTER I. --- INTRODUCTION --- p.3 / REFERENCES --- p.6 / Chapter CHAPTER II. --- BRIEF REVIEW OF THE ANALYTICAL METHODS USED / Chapter 1. --- Spectrophotometry --- p.8 / Chapter 2. --- Derivative spectrophotometry --- p.9 / Chapter 3. --- Atomic absorption spectrometry --- p.12 / Chapter 4. --- X - Ray fluorescence --- p.12 / REFERENCES --- p.14 / Chapter CHAPTER III. --- SIMULTANEOUS DETERMINATION OF ALUMINIUM OXIDE AND IRON (III) OXIDE / Chapter 1. --- Introduction / Review of the reported methods --- p.15 / Determination of aluminium and iron with / 8-hydroxyquinoline --- p.18 / Chapter 2. --- Experimental --- p.21 / Chapter 3. --- Results and discussion / Determination of iron --- p.28 / Determination of aluminium --- p.38 / Chapter 4. --- Conclusion --- p.52 / REFERENCES --- p.53 / Chapter CHAPTER IV. --- RAPID DETERMINATION OF CALCIUM OXIDE / Chapter 1. --- Introduction --- p.56 / Chapter 2. --- Experimental --- p.62 / Chapter 3. --- Results and discussion --- p.66 / Chapter 4. --- Conclusion --- p.79 / REFERENCES --- p.80 / FIGURES / Chapter II-1 --- Attenuation of a beam of radiation by an absorbing solution --- p.8 / Chapter II-2 --- Gaussian curve and its first to fourth derivatives --- p.11 / Chapter III-l --- Effect of pH on the extraction of metals with8- hydroxyquinoline --- p.19 / Chapter III-2 --- "Normal absorbance spectra of the metal - oxinates: A1 (5ppm), Fe (5ppm)" --- p.20 / Chapter III-3 --- Effect of pH on the determination of iron (5ppm) --- p.29 / Chapter III-4 --- Calibration curve for the determination of iron (III) by spectrophotometry at 580 nm --- p.33 / Chapter III-5 --- "The first derivative spectra of metal-oxinates A1: 5ppm, Fe : 5ppm" --- p.39 / Chapter III-6 --- "The second derivative spectra of metal-oxinates, A1: 5ppm, Fe : 5ppm" --- p.39 / Chapter III-7 --- "Normal absorption spectra of the metal-oxinates : A1(5 ppm), Ti (5 ppm)" --- p.41 / Chapter III-8 --- Effect of pH on the determination of aluminium --- p.43 / Chapter III-9 --- Calibration curve for the determination of aluminium by second derivative spectrophotometry at 390 nm --- p.47 / Chapter IV-1 --- "Effect of pH on the development of colour of Ca- GBHA complex. Ca : 1.2 ppm, wavelength : 530 nm" --- p.68

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