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Herein,with the exploitation of iron and nickel electrodes,the 2,4-dichlorophenol (2,4-DCP)dechlorinating processes at the anode and cathode,respectively,were separately studied via various electrochemical techniques (e.g.,Tafel polarization,linear polarization,electrochemical impedance spectroscopy).With this in mind,Ni/Fe nanoparticles were prepared by chemical solution deposition,and utilized to test the dechlorination activities of 2,4-DCP over a bimetallic system.For the iron anode,the results showed that higher 2,4-DCP concentration and solution aridity aggravated the corrosion within the electrode.The charge transfer resistance (Rct) values of the iron electrode were 703,473,444,and 437 Ω·cm2 for the initial 2,4-DCP concentrations of 0,20,50,and 80 mg/L,respectively.When the bulk pH of the 2,4-DCP solution varied from 3.0,5.0 to 7.0,the corresponding Rct values were 315,376,and 444 Ω·cm2,respectively.For the nickel cathode,the reduction current densities on the electrode at-0.75 V (vs.saturated calomel electrode) were 80,106,and 111 μA/cm2,for initial 2,4-DCP concentrations of 40,80,and 125 mg/L.The dechlorination experiments demonstrated that when the initial pH of the solution was 7.0,5.0,and 3.0,the dechlorination percentage of 2,4-DCP by Ni/Fe nanoparticles was 62％,69％,and 74％,respectively,which was in line with the electrochemical experiments.10 wt％ Ni loading into Ni/Fe bimetal was affordable and gave a good dechlorination efficiency of 2,4-DCP,and fortunately the Ni/Fe nanoparticles remained comparatively stable in the dechlorination processes at pH 3.0.