DEVELOPMENT OF AN IRON ELUTION DEVICE USING IRON AND STEEL SLAG AS AN IRON SOURCE

Abstract

 It is said that the poverty of iron supplied to the coastal areas contributes to the decrease in marine products. The concentration of iron in natural water is low, and it is difficult to clarify the role of iron locally. In this study, an experiment was conducted to develop an iron elution device that uses a microbial fuel cell to elute a sufficient amount of Fe²⁺ from steel slag. At the first stage of the iron elution device development, the balance of the charge in the dissolution of steel slag to the elution of iron ions into the water layer.At the second stage, a prototype was evaluated for site to determine the elution and supply form of iron ions in natural water. As a result, it became clear that the supply of H+ and O₂ to the water layer is indispensable in order to elute sufficient Fe²⁺ ions. Furthermore, the presence of Fe²⁺ was confirmed even in the field where the oxidation of Fe²⁺ to Fe³⁺ was concerned, and the possibility of supplying Fe²⁺ to the tidal flat by this device was found.