Figure 1 (IMAGE) Shinshu University Caption Left image: The picture of a nano-polystyrene suspension (500 mg L−1, pH 7) (left) and the nano-polystyrene suspension after adding pectin (15 mg L−1) and Fe(III) (0.10 mM) after storage for 72 h (right). Right image: TEM image of the precipitate Credit CREDIT: COPYRIGHT © 2022 ELSEVIER LTD. ALL RIGHTS RESERVED. Usage Restrictions Credit must be given to the creator. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.