K. Fukatsu et S. Kokot, Bleaching of cotton fabric by electrogenerated species - Decoloration of coloring matter by electrolysis, TEXT RES J, 70(4), 2000, pp. 340-346
Decoloration of dyes such as methylene blue and tartrazine solutions is inv
estigated by subjecting dye solution to electrogenerated oxygen or chlorine
species in electrolytes at a Pt anode. Decoloration is weak in the presenc
e of electrogenerated oxygen species but increases in the KCl electrolyte.
Decoloration in this solution is accomplished by the electrogenerated hypoc
hlorite ion. Also, when placed in contact with a Pt anode, cotton fabric dy
ed with reactive dyes is decolorized significantly after short-term electro
lysis in an electrolyte containing KCl, but decoloration of dyed fabrics is
very weak in an electrolyte that is free from KCl.