固体高分子電解質を用いた電解法による染料含有着色水の脱色処理-オレンジIIの電解処理-

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A solution of Orange II, one of the typical azo dyestuffs was electrolyzed by Solid Polymer Electrolyte (SPE) electrolysis with two high oxygen overvoltage anodes, PbO2 and SnO2 without adding any electrolytes. The solution was decolorized completely by the 120 minutes electrolysis, using PbO2 anode at current density of 0.2 A·:cm-2. However, even after 180 minutes of electrolysis with PbO2 anode at 0.3 A·cm-2, 60% of total organic carbon (TOC) and 35% of chemical oxygen demand (COD) remained. Biodegradability of the electrolyzedobserved at high current density condition (about 0.5 A·cm-2) and longterm electrolysis (about 200 hours). TOC reduction was higher for SnO2 electrode doped with 1% Sb than for PbO2. Although Sb doping reduced cell resistance, the electrolytical cell voltage for SnO2 (8.5V) was much higher than that of PbO2 (3.5V).
社団法人　日本水環境学会の論文
1998-01-10