Poster (EARTH)

[PE1-036] Facile and efficient removal of metal anions using a amino function group assited precipitation for recycling high-purity rare metal

○Takashi Ogi¹, Takahiko Makino², Hayato Horiuchi¹, Kikuo Okuyama¹ (1. Depertment of Chemical Engineering, Fuculty of Engineering, Hiroshima University, 2. Cutting Tool R&D Division, Kyocera Corporation)

Keywords:sustainable recycling technique, Adsorption, Precipitation, Polyoxometalate, Recovery of rare metal

We present a facile method for tungsten ion removal using lysine for the development of an environmentally friendly and sustainable recycling technique. Lysine addition to the tungsten solution achieved 100% tungsten removal within 5 min, as a white lysine–tungsten precipitate. Calcination of the lysine–tungsten precipitate produced tungsten oxide powder of high purity (99.6%) because the lysine is completely decomposed. This facile and useful metal removal method can be used for polyoxometalates of other metals such as molybdenum, tantalum, and niobium.