Premium
Degradation of color photographic waste fix solution by anodic oxidation
Author(s) -
Ragauskas Romas,
Dikčius Arvydas,
Vengris Tomas,
Padarauskas Audrius
Publication year - 2003
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.747
Subject(s) - tetrathionate , thiosulfate , electrolysis , anode , chemistry , sulfur , inorganic chemistry , decomposition , sulfate , degradation (telecommunications) , ion exchange , electrolytic cell , cathode , electrode , ion , electrolyte , organic chemistry , computer science , telecommunications
By use of a capillary electrophoretic method for anion analysis the anodic oxidation of thiosulfate, present in color photo bleach‐fix solutions, was investigated. In a specially constructed electrolysis cell with a cation‐exchange membrane separating the electrode chambers and with a carbon flow‐through three‐dimensional anode the two‐stage anodic oxidation of S 2 O 3 2− anions was realized. In the first stage, S 2 O 3 2− anions were oxidized to a maximal degree to an intermediate compound – tetrathionate (S 4 O 6 2− ) – then S 4 O 6 2− anions were oxidized to the sulfate (SO 4 2− ), avoiding the decomposition of intermediate compounds and the formation of harmful sulfur compounds. © 2002 Society of Chemical Industry