ELECTROCHEMICAL METHOD FOR TREATING EXCESS ACCUMULATED SEDIMENT ON THE RIVERBANK OF TIDAL RIVERS

Abstract

 Recently, sediment treatments via electrochemical methods have been paid attention. In this paper, removal mechanisms of nutrient salts and hydrogen sulfide (H₂S) via an electrokenetic method, and the factors that impact the performance of electrokenetic method are reviewed. Furthermore, field experiments were conducted to confirm the removal rates of nutrient salts and H₂S via our developed electrochemical method, i.e. solar cell-combined electrokenetic method. The combination of solar cell makes it possible to increase the anode potential from the sediment potential to 1.5 V. This can facilitate oxidation reactions at the anode (various oxidations occur), leading to a larger increase in the removal rates of nutrient salts and H₂S. From field experiments, high removal rates of nutrient salts and H₂S were confirmed, indicating that our deveolpoed method can be used for treating excess accumulated sediment in littoral regions.