title: Leaching of silver from solid waste using ultrasound assisted thiourea method.
abstract: Thiourea leaching of precious metals such as gold and silver from ores has several advantages when compared with conventional cyanidation process. In recent years, the use of ultrasound in leaching processes is becoming increasingly popular in hydrometallurgy. This paper deals with combining these two techniques for silver leaching from solid waste of a cyanidation leach plant located in Kutahya, Turkey. The primary aim of this research is to assess the technical performance of the method. To achieve maximum leaching yield, eight process variables have been selected to estimate optimum process conditions by means of statistical factorial design and steepest ascent techniques. Laboratory-scale experiments showed that complete leaching of silver may be achieved by this process.
authors.affiliation: Department of Environmental Engineering, Engineering Faculty, Gebze Institute of Technology, 41400 Gebze, Kocaeli, Turkey. soncel@gyte.edu.tr
authors.forename: M Salim
authors.initials: MS
authors.lastname: Oncel
authors.forename: Mahir
authors.initials: M
authors.lastname: Ince
authors.forename: Mahmut
authors.initials: M
authors.lastname: Bayramoglu
mesh_terms: D000465:Algorithms; D003486:Cyanides / Q000737:chemistry; D004785:Environmental Pollutants / Q000032:analysis; D008906:Mining; D010316:Particle Size; D012037:Refuse Disposal; D012834:Silver / Q000737:chemistry* / Q000302:isolation & purification; D018030:Silver Compounds / Q000737:chemistry; D013890:Thiourea / Q000737:chemistry*; D014465:Ultrasonics
chemical_list: D003486:Cyanides; D004785:Environmental Pollutants; D018030:Silver Compounds; D012834:Silver; D013890:Thiourea