The Electrochemistry Of Metal Ions In Industrial Streams

Show simple item record Van Aswegen, Anton 2006-04-24T08:29:07Z 2006-04-24T08:29:07Z 2006-04-24
dc.description Degree: Master of Science Department: Engineering en
dc.description.abstract The electrochemical recovery of low concentrations ( < 200 1 l mg − ) of palladium and platinum from a selected refinery effluent was investigated. Cyclic Voltammetry (CV) provided qualitative evidence that palladium and platinum contained in an effluent with an acid chloride matrix could be deposited on a graphite cathode. Experimental techniques related to (i) the use of synthetic solutions (ii) the variation of potential scan ranges, (iii) the use of a witness ion ( + 3 Fe ), and (iv) the use of glassy carbon or platinum disc working electrodes were used to assist with the interpretation of voltammograms. Exhaustive electrolysis experiments via a graphite working electrode demonstrated the recovery of palladium and platinum in the refinery effluent to concentrations of < 1 1 l mg − . Copper present in the effluent was co-deposited with the precious metals. Exchange current densities ( o j ), electron transfer coefficients ( á), standard rate constants ( s k ) and mass transfer coefficients ( m k ) were determined for selected reduction-oxidation (redox) couples via a custom made Rotating Disc Electrode (RDE). en
dc.format.extent 2898561 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.subject Streams en
dc.subject Industrial en
dc.subject Metal en
dc.subject Electrocmemistry en
dc.title The Electrochemistry Of Metal Ions In Industrial Streams en
dc.type Thesis en

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