Remediation of phenol-contaminated sediment by non-uniform electrochemical oxidation reactor

Using a new cylindraceous electrochemical oxidation reactor to remedy phenol-contaminated sediment was experimentally investigated for the first time. Under different conditions, such as the applied voltage and phenol concentration, the removing efficiency of phenol in this non-uniform electrochemical reactor was investigated. The Matlab method of interpolation and curve fitting was introduced into data processing, and a precise and visualized trend analysis was provided in a three-dimensional parameter field. Reaction kinetics of phenol degradation in this reactor was proven to be a pseudo first-order kinetics process, and the pseudo first-order rate constant was calculated as 0.04386 h(-1). The feasibility of electrochemical technology coupled with in situ carbon adsorption was also examined, and this cooperation could shorten treating-time significantly. In this non-uniform electric field, reversing the polarity of electrode to prolong the using lifetime of feeder electrodes was also tested. The experimental results have some contribution in the study of how to remediate sediment by electrochemical oxidation.