Removal of mercury metal in food industry wastewater using reduced graphene oxide adsorbent composited with magnetic nanoparticlesAdel Beig Babaei*a, Arash Dara b, Hanieh Sadat Taheri a Department of Food Chemistry, Research Institute of Food Science and Technology (RIFST), Mashhad, Iran Department of Food Processing, Research Institute of Food Science and Technology (RIFST), P.O.Box 91735-147, Mashhad, Iran Corresponding Email: *Baikbabaei2004yahoo.com Abstract: Water pollution by heavy metals is a major and evolving problem worldwide. Heavy metals are among the environmental pollutants whose contact can lead to chronic and sometimes acute poisoning in humans. In recent years, various methods have been used to remove heavy metals from aquatic environments, including the process of surface absorption. Graphene oxide nanoparticles are widely used