Research " Activated Carbon Composite Materials from Rubber Wood Sawdust and Nanomagnetic Fe3O4 + PVDF for Adsorption of Liquid Waste Materials Based Heavy Metal". The study aims to measure the ability of activated carbon from rubber wood sawdust as an adsorbent of heavy metals such as Cu, Cd and Pb. This research was performed with colection and analizing data in the laboratory . The mixing pr…