A Brief Review on Environmental Application of Boron Doped Diamond Electrodes as a New Way for Electrochemical Incineration of Synthetic Dyes

Table 1

Percentage of color removal and COD decay obtained for the electrochemical oxidation treatment with BDD anodes of selected synthetic dyes solutions under optimized conditions at ambient temperature or 25°C.

Dye	Solution	Electrolytic system	j ^a/mA cm^−2	Color removal/%	COD decay/%	Ref.
Si/BDD; 3,4,5-; trihydroxybenzoic acid)	1000 mg dm^−3 in HClO4	A one-compartment electrolytic flow cell with parallel plate electrodes.	20–60	100	100	[43]
Remazol Brilliant Blue	50 mg dm^−3 RBBR, 0.05 M Na2SO4 and 0.01 M NaCl with an initial pH of 5.8 and conductivity 8.5 ms cm^−1	Batch mode in a 100-mL single-compartment cell with a boron-doped diamond anode of geometric area 5 cm^2.	20–40	99	98	[29]
Acid Yellow 1	1000 mg dm^−3 in 0.5 M HClO4	A one-compartment electrolytic flow cell with a BDD of 50 cm^2.	0.5–1.5^b	100	100	[30]
O-toluidine	1×10^−4-1×10^−3 M^c	A two compartments Thermostated cell under different current densities, temperatures, and COT concentration.	20–100	—^d	70–90	[33]
Basic Blue 3	1000 mg dm^−3	thermojacketed BTT reactor was used with BDD Raschig’s rings.	0.5–0.875	99	87	[34]
Crystal violet	33–600 mg dm^−3	In a 150 mL, one-compartment electrolytic cell with a BDD of 4 cm^2.	2.5–15	100	80–95	[44]
Acid Black 210	500 mg dm^−3	In an one-compartment filter-press flow cell.	25–100	100	80–97	[35]
Nb/BDD; Orange II	50 mg dm^−3 in the presence of different supporting electrolytes, 200 mL in each run	Batch recirculation reactorcontaining one-compartment cell equipped with boron-doped diamond anode and Pt cathode.	1.29–7.68	80–98	80–95	[31]
Ti/BDD; Alizarin Red S	0.278 mM^c	Electrolytic cell with a single compartment without diaphragm with Ti/BDD (1.5 cm^2) anode and Ti/RuO2–TiO2–SnO2 (9 cm^2) cathode.	40	100	100	[41]

^aApplied current density, ^bpotential, ^cmolar concentration, ^dnot determined.