Value-added materials from the hydrometallurgical processing of jarosite waste Benjamin P. Wilson, Petteri Halli, Inka Orko, Petteri Kangas, Mari Lundström and Petteri Koukkari E3S Web Conf., 8 (2016) 01015 Published online: 16 September 2016 DOI: 10.1051/e3sconf/20160801015