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

Table 3

Removals of COD and TOC, Absorbance at 468 nm (AO7) and 250 nm (Arom), and relative current efficiency obtained after the electrochemical degradation of the effluents from the UASB reactors [27].

Current density/mA cm^−2 Electrolyte	10			20
	N	S	C	N	S	C
Mesophilic
% Removal
COD	45	52	67	72	84	72
TOC	41	21	19	31	31	24
Abs486	66	77	90	89	100	100
Abs250	73	70	75	85	86	81
EC/ECN20	0.31	0.19	0.19	1	0.57	0.52
Thermophilic
% Removal
COD	54	52	63	83	67	90
TOC	30	29	24	31	31	30
Abs486	72	43	100	81	81	100
Abs250	69	65	77	81	78	91
EC/ECN20	0.32	0.24	0.20	1	0.58	0.51

N: no added electrolyte, S: sulphate, C: chloride, 10, 20: current densities of 10 and 20 mA cm⁻², EC: energy consumption, EC/EC_N20: relative efficiencies values are calculated with respect to the assay with no added electrolyte at 20 mA cm⁻².