Researchers developed a new material made from iron, lignin (a plant-derived substance), and chitosan that can effectively remove poisonous antimony from contaminated water. When tested, this material successfully removed over 95% of antimony from water samples and could be reused multiple times. The material works by creating chemical bonds with antimony molecules, trapping them on its surface. This environmentally friendly solution could help treat industrial wastewater containing multiple types of heavy metals.