Prof. Jui-Yen Lin
Department Chemical and Materials Engineering, National Kaohsiung University of Science and TechnologySpeech Title: Continuous electrochemical synthesis of dopamine decorated magnetite for enhanced arsenic removal from synthetic groundwater
Abstract: Arsenic pollution is widespread in groundwater systems, posing a serious threat to the environment and human health. Therefore, the development of highly efficient and recyclable adsorption materials is of great significance. This study used nano-magnetite (Fe3O4) as a substrate and modified it with dopamine to form a composite material (Fe3O4@PDA) with a high specific surface area. The adsorption capacity for arsenic species was enhanced by the catechol and amino functional groups abundant on the polydopamine surface. The surface properties and structure of the material were characterized using relevant analytical techniques. The results showed that dopamine was successfully coated on the magnetite surface, providing a large number of active adsorption sites. In adsorption experiments, Fe3O4@PDA exhibited good removal effects for both As(III) and As(V), suggesting that the main mechanisms include multiple interactions such as surface coordination, hydrogen bonding, and electrostatic adsorption. This electrochemical synthesis method offers a promising and feasible solution for the dispersion removal and recovery of arsenic from contaminated groundwater.