[6p-A401-1~14] 1.4 Energy conversion, storage, resources and environment

△ [6p-A401-2] Heavy metal adsorption and desorption behavior of bipolar NIPA gel

〇Atsunori Nagayama¹, Yoshiki Hidaka², Hirotaka Okabe^1,2, Kazuhiro Hara^1,2 (1.Kyushu Univ S.l.s., 2.Kyushu Univ.)

Keywords:gel, resource, heavy metal

To aim at separating and recovering heavy metals in industrial waste liquid, N-isopropylacrylamide (NIPA) having temperature sensitivity in the main chain introduced to prepare a bipolar NIPA gel aiming at simultaneous adsorption of positive and negative ions and selective desorption. Next, we investigated the adsorption / desorption behavior when changing the pH of the solution at the time of adsorption and desorption of the gel. As a result of the experiment, it was found that the adsorption amount is maximized at pH 4 to 5, and desorption of Cr (VI) hardly occurs at pH 3 or higher.