... Abstract It was studied experimentally the leaching of bioactive elements (Cu, Co, Mo) from carbamide-free and high-carbamide compositions based on phosphogypsum. ... It was demonstrated that the Mo-, Cu- and Co- salts leaching from carbamide-free phosphogypsum granuls are more than from granuls with high carbamide content. ... Moscow University Chemistry Bulletin . 2008, Vol. ... 4, P. 270 . Copyright (C) Chemistry Dept., ... Copyright (C) Chemisty Department of Moscow State University . ...