Electrochemically activated persulfate and peroxymonosulfate for furfural removal: optimization using Box-Behnken design.

ABSTRACT

Furfural removal by electrochemically activated peroxydisulfate (E-PS) and peroxymonosulfate (E-PMS) was investigated. The effect of different anodes was investigated for the electrochemical activation of oxidants. Box Behnken Design was applied to determine optimum operating conditions, which were determined as follows; PS concentration 2.3 mM, applied current 1.15 A, pH 3.5, and reaction time 118.3 min for E-PS process; PMS concentration 1.8 mM, applied current 1.05 A, pH 3.3, and reaction time 107.8 min for E-PMS process. The results of the study showed that the E-PMS process is more advantageous in terms of the chemical and electricity costs to be used.