| It is urgent to solve the pollution problem of microorganism in ballast water. Based on the electrolytic process, taking seawater of Bohai Bay as treatment object, the corresponding bactericidal effect of three kinds of anode materials (graphite rod, carbon plate and carbon fiber) was investigated with carbon fiber as cathode at 2.00 V; then the bactericidal performance of carbon plate as anode material was characterized under different cell voltages, and a preliminary analysis on the bactericidal mechanism was carried out. The results showed that the bactericidal effect of the three anode materials was in the order of graphite rod > carbon plate > carbon fiber, and the bactericidal effect of each anode material was obvious; the bactericidal ratio could reach 100% at 18 min with carbon plate as anode. When carbon plate was used as the anode, the higher the cell voltage was, the more significant sterilization effect would be, and 1.81V was preferred and the corresponding bactericidal ratio was above 99% at 18 min in this study. The concentration of chloride ions and pH in the system showed a decreasing trend with time under different cell voltages, which could explain the sterilization process to some extent. The results could provide reference for the treatment of ballast water by electrolysis. |
