Department of Mining Engineering;
Science and Research Branch;
Islamic Azad University;
Tehran;
Iran;
Faculty of Mining;
Petroleum & Geophysics Engineering;
Shahrood University of Technology;
Shahrood;
Iran;
Department of Civil Engineering and Architecture;
University of Catania;
Catania;
Italy;
Faculty of Mining Engineering;
Amirkabir University of Technology;
Tehran;
Iran;
LEACHING; Total Sulfur; Pyritic Sulfur; Organic Sulfur; Response Surface Methodology (R.S.M.);