Labradorite dissolution in aqueous organic acid solutions : an experimental study /
(pHi=3.5, 4.7), pH-buffered solutions of 0.07m
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (pHi=3.5, 4.7), pH-buffered solutions of 0.07m (pHi=4.4), and 0.07m acetate-0.005m citrate (pHi=4.4). Pore acetate solution. On the other hand, both oxalate and acetate-oxalate solution to 42 KJ/mol for the acetate-citrate acetate(pHi=3.5, 4.7, 5.4), 0.07m acetate0.005m oxalate activation energies of dissolution was different for Al was below detection limit in the studies with 0.07m citrate > oxalate > acetate. However, at 50'C, the order of citrate in pH-buffered acetate solution can result in compared to distilled deionized water and HCI in the order different fluids and ranged between 18 KJ/mol for the dissolution is weakly dependent on pH in acetate buffer dissolution rates. The reproducibility between studies are essentially identical. Scanning electron microscope experimental conditions, reacting solid, and reaction Experiments were conducted in sand-pack, flow-through fluid flow was essentially constant (25-30 ml/hr) for rate increased both solubility and dissolution rate of labradorite investigation. SEM images also show extensive leach-pits on kinetics at 50' and IOO'C and 13.8 MPa. Labradorite grains mechanisms, they are quite reasonable. Labradorite observations revealed secondary precipitates, which is the OO'C, all the organic acids used in this study significantly possible reason for incongruent dissolution observed in this predicted by surface reaction models, considering the probable cause of removal of oxalate from solution and also a processes. The reaction history has little effect on measured reacted labradorite surfaces indicating surface controlled reactors to study labradorite solubility and dissolution region, the rates in the acetate buffer, DDW, and HCI are significant Al (up to 4 mmolal) in solution. Calculated solubility determinations. Under mildly acidic condition at I solution over the pH range of 3.5 to 5.5. In the neutral solution. Although, these values are lower than that studies and semi-static and slow (0.03-0.3 ml/hr) for the dissolution rate changes to oxalate > citrate > acetate. very good. were reacted with distilled deionized water, HCI solutions |
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| Item Description: | "Major subject: Geology". Vita. |
| Physical Description: | x, 64 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |