Nickel removal performance was adversely affected
by the decrease of initial pH from its original value of 6. Optimum working conditions for electrocoagulation
of metal plating effluent were established as follows: an applied current density of 9mA/cm2, the
effluent’s original electrolyte concentration and pH of the composite sample. TOC removal rates obtained
for all electrocoagulation runs fitted pseudo-first-order kinetics very well (R2 > 92–99).