Synthesis and characterization of graphite/magnetite composite as low cost potential adsorbent from graphite wasteEny Kusrini, Felix Oktavianto, Agustina Simanjuntak, Giovanni Pasca and Anwar UsmanE3S Web Conf., 67 (2018) 03029DOI: https://doi.org/10.1051/e3sconf/20186703029