Insights into the Synergistic Removal of Copper(II), Cadmium(II), and Chromium(III) Ions Using Modified Chitosan Based on Schiff Bases‑g‑poly(acrylonitrile) - Rehab Khaled Mahmoud; Fatma Mohamed; Esraa Gaber; Omayma F. Abdel-Gawad (ACS Omega, 2022)