leaching gold from printed circuit boards thiourea

The present communication deals with theleachingofgoldand silver from theprinted circuit boards(PCBs) of waste mobile phones using an effective and less hazardous system, i.e., athiourea leachingprocess as an alternative to the conventional

The present communication deals with theleachingofgoldand silver from theprinted circuit boards(PCBs) of waste mobile phones using an effective and less hazardous system, i.e., athiourea...

Mar 26, 2015· The present communication deals with theleachingofgoldand silver from theprinted circuit boards(PCBs) of waste mobile phones using an effective and less hazardous system, i.e., athiourea...

Jun 01 2012 · The present communication deals with theleachingofgoldand silver from theprinted circuit boardsPCBs of waste mobile phones using an effective and less hazardous system ie athiourea leachingprocess as an alternative to the conventional and toxic cyanideleachingofgoldThe influence of particle sizethioureaand Fe 3 concentrations and temperature on theleachingofgold

Metalsleachingfrom wasteprinted circuit boards. Part II: Influence ofthiourea, thiosulfate and thiocyanate concentration on theleachingprocess ... Theleachingofgoldinthiourea...

Jan 01, 2012· Journal of Qingdao University (E&T), 2011, 26: 69-73. [34] Wu J, Qiu LJ, Chen L, et al.Goldand silver selectivelyleaching from printed circuit boardsscrap with acidthioureasolution. Nonferrous Metals, 2009, 61: 90-93. [35] Zhong FW, Li DT, Wei JX. Experimental study onleaching goldinprinted circuit boardsscrap withthiourea.

Thiourea leaching goldand silver from theprinted circuit. The rapid growth in the use of electronic equipments combined with early obsolescence has contributed enormously to the generation of large quantity of electronic e waste One such e-waste the mobile phoneprinted circuit boardsPCBs contain various precious metals which can be extracted by different hydrometallurgical routes The ...

Jun 01 2012 ·Thioureais a selective and less hazardous agent as an alternative to the conventional and toxic cyanide The agent was applied toleach goldand silver from PCBs of waste mobile phones The influence of the particle sizethioureaand Fe 3 concentrations and temperature was investigated In the best condition about 90 ofgoldand only 50 of silver were leached with a contact time ...

Sep 09, 2020· The present communication deals with theleachingofgoldfrom theprinted circuit boards(PCBs) of waste mobile phones using an effective and …

The present communication deals with theleachingofgoldand silver from theprinted circuit boards(PCBs) of waste mobile phones using an effective and less hazardous system, i.e., athiourea leachingprocess as an alternative to the conventional

X. Li Jing-ying and W. Liu, “Thiourea leaching goldand silver from theprinted circuit boardsof waste mobile phones,” Waste Management,32, No. 6, 1209–1212 (2012). Article Google Scholar

The objective of this work was to recovergoldand silver from theprinted circuit board(PCB) of discarded mobile phones bythiourea leaching. Effects ofthioureaconcentration,leaching...

Jan 30, 2018· Zhong F et al (2006) Experimental study onleaching goldinprinted circuit boardsscrap withthiourea. Non-Ferrous Metals Recycl Util 6:25–27. Google Scholar 28. Wu J et al (2008) Study on selectivelyleaching goldfrom wasteprinted circuit boardswiththiourea. Chin JGold6:55–58. Google Scholar 29. Gernon M (1996) Preparation of a ...

Apr 08, 2019· Article Summary X. To removegoldfromcircuit boards, start by purchasing concentrated nitric acid from an industrial or chemical store. You’ll also need a face mask, safety glasses, and industrial gloves to work with nitric …

Apr 12, 2017· Computers and other electronic devices containgoldand other precious metals in theircircuit boards. As consumers upgrade their electronic gadgets, the precious metals remain trapped in piles of waste. There’s about 0.2 grams (0.007 ounces) ofgoldin a typical mobile phone handset. Recovery of thisgoldrequires ...

Aug 31, 2016·Goldis often found onprinted circuit boards, particularly under keyboards where its durability is an advantage. According to the UE researchers, about 300 tonnes of the metal are used in ...

Thiourea leaching goldand silver from theprinted circuit. The rapid growth in the use of electronic equipments combined with early obsolescence has contributed enormously to the generation of large quantity of electronic e waste One such e-waste the mobile phoneprinted circuit boardsPCBs contain various precious metals which can be extracted by different hydrometallurgical routes The ...

Thiourea leaching goldand silver from theprinted circuit boardsof waste mobile phones. Waste Management, 2012, 32(6): 1209–1212 DOI: 10.1016/j.wasman.2012.01.026 PMID: 22386109

The objective of this work was to recovergoldand silver from theprinted circuit board(PCB) of discarded mobile phones bythiourea leaching. Effects ofthioureaconcentration,leachingtemperature,leachingtime, and ferric ion (Fe3+) concentration on the recovery ofgoldand silver were investigated. The PCB was pretreated physically to reduce thethioureaconsumption and enhance the ...

The recovery rate of copper was found to be 96.42%, and 94.3% of thegoldwas leached in the former process. Similar trends were obtained for theleachingof copper andgoldin the latter process, but it was lower that about 95.27% of copper was recycled, while 93.4% ofgoldwere leached. Both the two processes were nontoxic and non-cyanide system.