Engineering & Technologies, 2016, 9(5), 703-713 ~ ~ ~ УДК 628.316.12 Development of the Optimal Wastewater Treatment Technologies Refi ning of Precious Metals Liudmila V. <...> Lisakov* and Sergei D. Ershov Gipronickel Institute 11 Grazhdansky ave., St. <...> Petersburg, 195220, Russia Received 22.03.2016, received in revised form 14.05.2016, accepted 06.07.2016 The most widespread method in gold production is cyanide leaching of ore concentrates. <...> In this regard, there arises a need to solve the problem of wastewater treatment. <...> The process of cyanide removal is well known and proven in an industrial scale. <...> As a result, gold mining companies have to solve the problem of neutralization of discharged water both in terms of cyanide and thiocyanates. <...> The problem is currently particularly burning at Russia’s operations as requirements for cyanide and thiocyanate contents in treated effl uents are virtually commensurate. <...> This present paper summarizes the results of research in the fi eld of treatment of wastewater containing, along with cyanides, a signifi cant amount of thiocyanates. <...> Our studies have shown high effi ciency of the process of wastewater oxidation by ozone. <...> The developed method provides the compliance with the legislation requirements on the content of cyanides and thiocyanates in wastewater. <...> Development of the optimal wastewater treatment technologies refi ning of precious metals, J. <...> All rights reserved * Corresponding author E-mail address: jnlis@nickel.ru # 703 # Liudmila V. <...> Development of the Optimal Wastewater Treatment Technologies Refi ning… <...> Разработка оптимальной технологии очистки сточных вод рафинировочного производства драгоценных металлов Л.В. Бикетова, Ю.Н. Лисаков, С.Д. Ершов ООО «Институт Гипроникель» Россия, 195220 <...>