Research Article pubs.acs.org/journal/ascecg
Urea−Ammonium Nitrate Aqueous Solutions Containing Cu Micronutrient Obtained from Cable Manufacturing Solid Waste J. Baltrusaitis*,† and A.M. Sviklas‡ †
Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States ‡ Department of Physical and Inorganic Chemistry, Kaunas University of Technology, Radvilenu St. 19, LT-50254 Kaunas, Lithuania ABSTRACT: In this work, sustainable metal recovery from waste and conversion into Cumicronutrient-containing N fertilizers was developed utilizing the HNO3 extraction method. For this purpose, solubility diagrams, i.e., polytherms, were constructed of the ternary CO(NH2)2Cu(NO3)2-H2O and NH4NO3-Cu(NO3)2-H2O systems to determine the corresponding phase equilibria and solid material chemical composition. Copper extraction in the form of watersoluble Cu(NO3)2 was performed from the industrial Cu cable manufacturing waste, using HNO3 concentrations relevant to the industrial conditions (56−58%) at a moderate temperature of 60 °C. Waste dissolution in aqueous NH4NO3 solutions resulted in only partial dissolution of
