Erratum to: Biosorption of Pb2+ and Cu2+ in aqueous solutions using agricultural wastes Aileen D. Nieva, Bonifacio T. Doma Jr, Huan-Ping Chao and Lai Siang Leng EPJ Web Conf., 162 (2017) 01088 Published online: 30 December 2017 DOI: 10.1051/epjconf/201716201088