following table 2 the current efficiency was ca 100 at operating potentials of u2266 1 1 v but dropped to 77 at 1 2 v table 2______________________________________evaluations of operating potential for potentiostaticpulse electrolysistemperature 50 u00b0 c anolyte from 24 to 18 21 g l as sub 2 o sub 3 in 3 3 5mh sub 3 aso sub 4catholyte 1 9 2 1m h sub 2 so sub 4operating potential average current current efficiency v versus sce density ka sq m ______________________________________1 0 0 071 103 1 1 0 059 105 1 2 0 092 77______________________________________ based on anodic charge and surface area of both sides 8 4 cm sup 2 based on total anodic charge and loss of as iii oxide from anolyte due to the diffusional loss of as iii oxide to catholyte accounting for u2266 5 current efficiency temperature effect the temperature effect was evaluated over the range 50 u00b0 70 u00b0 c pulses were 1 0 v for 11 seconds and 0 2 v for 1 second at 70 u00b0 c the current efficiency and the average anodic current density were 96 and 0 143 ka sq m resp with an initial concentration of 17 g l as iii oxide and a final concentration of 12 g l as iii oxide in 3 76 4 02 m as v acid as anolyte at 50 u00b0 c they were 100 and 0 071 ka sq m with an.