Adsorption of Cu2+ Ions using Rubber-Based HydrogelSiti Salihah Jamaluddin, Rozidaini Mohd Ghazi, Nik Raihan Nik Yusoff and Siti Fairus Mohd YusoffBIO Web Conf., 73 (2023) 05003DOI: https://doi.org/10.1051/bioconf/20237305003