Preparation of green magnetic hydrogel from soybean residue cellulose for effective and rapid removal of copper ions from wastewater

The treatment of industrial wastewater has become a worldwide concern. Among them, heavy metal pollution is a serious threat to the ecological environment and human health. In this context, it is an inevitable trend to develop the corresponding governance system and technology . In this study, a magnetic hydrogel with adsorbable properties was prepared by physical cross-linking with soybean residue cellulose. It is adsorbed by chelating the -NH 2 groups with Cu 2+ . The results show that the increased of cellulose content benefits the mechanical strength and swelling property of the hydrogel. Through the study of adsorption isotherm , it was found that adsorption of Cu2 + by the magnetic hydrogel conforms to Freundlich model and belongs to multilayer mixed adsorption. This study provides a feasible method to prepare a new absorbent of magnetic hydrogels using natural and sustainable materials.