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Please use this identifier to cite or link to this item: http://hdl.handle.net/11375/26412
Title: Isotope Effects in the Chemical and Bacterial Reduction of Sulphur Compounds
Authors: Harrison, Alexander
Advisor: Thode, H. G.
Department: Chemistry
Keywords: isotope effect;chemical reduction;bacterial reduction;sulphur compounds
Publication Date: Oct-1956
Abstract: Equilibrium exchange constants were calculated for exchange of sulphite with other sulphur compounds. The equilibrium constant for sulphur Isotope exchange between sulphate in solution and solid calcium sulphate was calcu­lated and measured experimentally. In the chemical reduc­tion of sulphate to sulphide S^32O-4 reacted 2.5% faster than S340-4 , in agreement with the calculated kinetic isotope effect for the step sulphate to sulphite. The isotope effect in the reduction of sulphate by Desulphovibrio desulphuricans was found to vary from 0.0 to 2.5% The results were inter­preted on the basis of a mechanism involving two consecutive steps, pick-up of sulphate and reduction of sulphate to sul-phite, competing for control of the rate. The isotope effect in bacterial reduction of sulphite was studied briefly.
URI: http://hdl.handle.net/11375/26412
Appears in Collections:Digitized Open Access Dissertations and Theses

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