New Methodology of Organic Electrochemical Synthesis - Fundamentals and Applications of Organic Electrochemistry - page 312

anode materials to optimize this technique
because the electrolytic products strongly
depend on these materials as well as the
operating conditions such as the current
density and temperature [18]. Various materials
have been developed to date as anodes. They
are classified as follows: carbon (amorphous
carbon, graphite), noble metal or metal oxides
(Pt, IrO 2 , RuO 2 ) and non-noble metal oxides
(PbO 2 , SnO 2 , TiO x ). Since early times,
electrolysis has been used for the treatment of
dye waste water by anodic oxidation of saline to
generate sodium hypochlorite solution, which is
used for decolouration of dye waste water.
Effluent water treatment has also been
performed using ozone generated by oxidation
of water with PbO 2. In recent years, BDD
electrodes have been developed, and they have
proved to be effective for detoxifying treatment
of waste water containing dye, organic acids,
phenols, soluble polymers and so on [19-21]. It
has also been shown that diamond-like carbon,
is effective for the degradation of persistent
organic fluoro compounds [22]. The efficient
degradation is attributable to hydroxyl radicals
electrogenerated at the BDD anode, resulting in
complete degradation to CO 2 [18].
Interestingly, this decomposition mechanism is
quite similar to that with TiO 2 photocatalyst.
BDD electrodes are also effective in the
degradation of organic additives in plating