dc.contributor.author | Jeschke, Alexander A | |
dc.date.accessioned | 2010-10-12T18:55:17Z | |
dc.date.available | 2010-10-12T18:55:17Z | |
dc.date.issued | 2002 | |
dc.identifier.uri | http://hdl.handle.net/11858/00-1735-0000-0001-315A-5 | |
dc.description.abstract | The dissolution kinetics of gypsum and anhydrite have been measured under various conditions. For gypsum an almost linear rate equation R=ks1(1-c/ceq)n1 is valid, where R is the surface rate, n1 1 is the kinetics order, c is the total calcium concentration at the surface, and ceq the equilibrium concentration with respect to gypsum. For the determination of the entire dissolution kinetics a batch set-up was used. This batch experiment reveals a dissolution rate equation R=ks1(1-c/ceq)n1 which switch close to equilibrium to a nonlinear rate equation R=ks2(1-c/ceq)n2 with n2 4.5. The experimentally observed dissolution rates from the batch experiment could be fitted by only minor variations with a mixed kinetics model. The rotating disk experiment on anhydrite reveals a surface controlled rate equation. For anhydrite the observed experimentally dissolution rates by a batch experiment are described by R=ks(1-c/ceq})n, where ks is the surface rate constant and n 4.2 is the kinetic order. Furthermore, a method for the determination of the rate equation parameters was developed ... | |
dc.format.extent | 120 S. | |
dc.format.mimetype | application/pdf | |
dc.language.iso | deu | |
dc.publisher | Univ. Bremen | |
dc.rights.uri | http://e-docs.geo-leo.de/rights | |
dc.subject.ddc | 549 | |
dc.subject.gok | VJK 000 | |
dc.subject.gok | VHB 600 | |
dc.subject.gok | VGC 000 | |
dc.title | Lösungskinetik von Gips und Anhydrit | |
dc.type | monograph | |
dc.subject.gokverbal | Experimentelle Geochemie | |
dc.subject.gokverbal | Sulfate, Chromate, Molybdate und Wolframate {Mineralogie} | |
dc.subject.gokverbal | Mineralchemie | |
dc.identifier.doi | 10.23689/fidgeo-210 | |
dc.identifier.ppn | 358564662 | |
dc.type.version | publishedVersion | |
dc.relation.collection | Geologische Wissenschaften | |
dc.description.type | thesis | |