Influence of Solution Composition and Chemical Structure of Dye on Removal of Organic Dye by DC Diaphragm Discharge in Water solutions

journal article - other

English

The process of organic dye removal from various water solutions containing organic dyes and inorganic additives by the DC diaphragm discharge has been studied in so called "negative part" of this discharge. The concentration of treated dye decreases almost exponentially to constant residual value. The final dye concentration reached approximately 20% of the initial value after 10 minutes of the treatment of the Direct Red 79 dye solution. The dye de-coloration was affected by the dye structure. The azo and diazo compounds have been degraded significantly faster to be compared to thiazine compounds. The degradation process requires an optimal adjustment of the initial solution conductivity. The optimum conductivity of approximately 600 microS cm-1 was found when the dye solution contained either NaCl or NaBr electrolytes. The type of electrolyte used for the conductivity adjustment considerably affects the process of dye de-coloration. Halogen compounds have been found to be the most proper compounds for such purpose.

diaphragm discharge, electric discharge in water solutions, organic dye decomposition

KOZÁKOVÁ, Z.; KRČMA, F.; NEJEZCHLEB, M.; SKALNÝ, J.

2008

25. 1. 2008

1203-8407

JOURNAL OF ADVANCED OXIDATION TECHNOLOGIES

11

1

Canada

155

162

8