Comparison of degradation of 2,4-D herbicide using other methods^a.

Methods	Electrode type	pH	C 0 (mg L−1)	Time (min)	j	Degradation (%)	COD (%)	Ref.
Electrochemical process	SS316	7	100	50	3 mA cm−2	17.65	*	7
Electrochemical process	Graphite	7	100	50	3 mA cm−2	47.76	*	7
Electrochemical process	Pb/PbO2	6	100	120	60 mA cm−2	57	56	2
Coupling electrooxidation and oxone	PbO2	4	40	90	30 mA cm−2	91	*	1
Photo assisted electro-peroxone	Platinum sheet	7	25	30	350 mA	89	*	3
Microwave activated electrochemical	BDD	*	100	180	55 mA	91	88	4
Coupled Fenton and biological oxidation	*	3	180	480	*	80	85–90	5
Oxidation process	*	3	200	120	*	68	*	6
Electrochemical coagulation process	iron	7	50	180	100 mA cm−2	91	*	8
Electrodegradation**	G/β-PbO2	5	100	100	9 mA cm−2	87.6	92.1	This study
Electrodegradation***	G/β-PbO2	5	100	100	9 mA cm−2	70.2	75.3	This study

^a*Not considered, ** three-dimensional electrode and *** two-dimensional electrode.