Abstract:
The utilization of electrochemical and advanced oxidation technologies for
industrial wastewater (IW) treatment has grown in popularity during the last
two decades. The effectiveness of several methods for treating IW, includ
ing hydrogen peroxide (H2O2), direct-current (DC) and alternating-current
(AC)-electrocoagulation (EC), and the combination of H2O2 with DC/AC-EC
(H2O2-DC/AC-EC) processes were all investigated. In comparison to the H2O2,
DC/AC-EC, and H2O2-DC/AC-EC technologies, the results showed that the
H2O2-AC-EC process produced 100% total colour and 100% chemical oxy
gen demand (COD) removal efficiency with a low power consumption of 4.4
kWhm−3.TheH2O2/AC-EC technology was optimized for treating IW using a
response surface methodology approach based on a central composite design
using a five-factor level. Utilizing statistical and mathematical techniques, the
optimum parameters were determined to minimize consumption of power (1.02
kWhm−3)andmaximumCODelimination(75%). The experimental parameters
comprised the following: H2O2 of 600 mg/L, current of 0.65 Amp, pH of 7.6,
CODof1600 mg/L, and treatment time (TT) of 1.26 h. When using a Fe/Fe elec
trode combination with the wastewater pHof 7,the CODremovalefficiencywas
shown to be enhanced by increasing the TT, current and H2O2, and decreas
ing the COD concentration. The synergistic impact, quantified as the combined
efficiency of eliminating % COD utilizing the H2O2, AC-EC, and H2O2/AC-EC
