·Gold recovery from printed circuit boards by selective breaking of internal metallic bonds using activated persulfate solutions J Clean Prod 166 2017 pp 1102 1112 / View PDF View article View in Scopus Google Scholar Arshadi and Mousavi 2015
·Recovery of gold and other precious metal resources from environmental polluted E waste printed circuit board by bioleaching Frankia Int J Environ Res 14 2 2020 pp 165 176
·An environmental benign non acid process was successfully developed for selective recovery of palladium from waste printed circuit boards PCBs In the process palladium was firstly enriched during copper recovery procedure and dissolved in a special solution made of CuSO 4 and NaCl The dissolved palladium was then extracted by
·Extraction and Stripping Behaviour Study on Gold Recovery from Printed Circuit Board Mohd Jumain Jalil 1 Mohd Saufi Md Zaini 2 Intan Suhada Azmi 1 and Nik Nur Farahanim Wan Shah 1 Published under licence by IOP Publishing Ltd
·1 Introduction Printed circuit boards PCBs essential in all sorts of electronic equipment and portable gadgets laptop computers and mobile phones contain substantial amounts of gold Au which oftentimes exceed those found in natural Au ores Jeon et al 2018a; Park et al 2017 Arima et al 2002 for example reported that
·Precious metal recovery from waste printed circuit boards using cyanide and non cyanide lixiviants—a review Waste Manag 1 2015 p 15 Google Scholar Aylmore and Muir 2001 Optimizing the thiosulfate leaching of gold from printed circuit boards of discarded mobile phone Hydrometallurgy 149 2014 pp 118 126
·The recovery of precious metals from waste printed circuit boards PCBs is an effective recycling process Sheng P & Etsell T Recovery of gold from computer circuit board scrap using aqua
on gold precipitation and characteristics of the resultant colloidal solutions as well as gold particles formed have investigated Based on the experimental results gold recovery from waste printed circuit boards WPCBs via the defined iodine iodide leaching followed by a direct precipitation was examined Influences of metal impurities
·Higher gold recovery at 75% was obtained for F casuarinae and copper 94% recovery by Frankia sp bioleaching of the biooxidised e waste at % low pulp densities The results were confirmed by XRD and SEM with EDX analysis Recovery of Gold and Other Precious Metal Resources from Environmental Polluted E waste Printed
·The paper describes a small full scale plant based on the Gold REC 1 process designed and patented by the University of L Aquila; the hydrometallurgical process allows the treatment of printed circuit boards PCBs The first step is a mechanical treatment to reduce the size of the scraps below 2 mm The extraction of base metals
·This study proposes a more environmentally friendly effective and selective technology for the recovery of Au from FPCBs providing a reference for the recovery of precious metals Download Download high res image 201KB Download Download full size image; Fig 1 General process flow diagram for gold recovery from
·Recovery of gold and other precious metal resources from environmental polluted E waste printed circuit board by bioleaching Frankia Int J Environ Res 14 2 2020 pp 165 176
Based on the experimental results gold recovery from waste printed circuit boards WPCBs via the defined iodine iodide leaching followed by a direct precipitation was examined Influences of metal impurities exist in WPCBs on the iodine iodide leaching and ascorbic acid precipitation were also discussed
·Precious metal recovery from waste printed circuit boards using cyanide and non cyanide lixiviants A review Waste Manag 45 2015 pp 258 271 Epub 2015/02/24 Recycling gold from printed circuit boards gold plated layer of waste mobile phones in mild aqua regia system J Clean Prod 278 2021 p
·At present the main metal recovery methods for WPCB MPs include mechanical physical separation pyrometallurgy hydrometallurgy and biometallurgy Hadi et al 2015 Traditional hydrometallurgy mainly uses strong acids or alkalis to leach the metal in the waste circuit board before the leaching solution is separated and impurities are
·Printed circuit boards PCBs are an essential and central component of electronic waste The rapid depletion of natural resources massive generation of end of life PCBs and inherently metal loaded values inevitably call for recycling and recovery
·Printed circuit boards PCBs and other electronic equipments are the major contributors to e waste encompassing a higher concentration of precious metallic elements like copper Cu silver Ag
·Recovery Gold from Waste Printed Circuit Boards by One Step Combination Electrolysis and Chlorination Process Yan Lu Zizhen He Bo Zeng Jianbo Wang with which waste printed circuit boards WPCBs containing 150 to 350 g/t of gold ac counting for roughly 3 4% [4 5] As a result there is widespread agreement that
·If you have access to a large amount of e waste you may literally be sitting on a gold mine There is gold that can be recovered from discarded computer circuit boards but in such small amounts that the time consuming and dangerous process required to remove gold from computer circuits is only worth your while if you have at least tons of
·A hydrometallurgical process for the recovery of gold and silver from waste printed circuit boards PCBs was experimentally verified and tested at pilot scale
·Printed circuit board PCB is the main component of e waste and comprises 4 7% of the total mass of e waste with approximately 90% intrinsic value in the precious metal content 2020 Qiu et al 2020 and gold recovery Rao et al 2020; Syed 2012
·Studies Tan et al 2017 have shown that 1 ton of waste mobile phone printed circuit boards WMPCBs contain kg of gold kg of silver and 259 550 kg of copper and the amount of gold recovered from waste mobile phones can meet nearly 10% of the global electronics manufacturing industry s demand for gold
The effect of a preliminary acid leaching for the recovery of gold by thiourea from printed circuit boards PCBs of spent mobile phones was investigated and qualitative considerations on the technical and economic feasibility of the different routes were made
·Rapid global technological development has led to the rising production of electronic waste that presents both challenges and opportunities in its recycling In this review we highlight the value of metal resources in the printed circuit boards PCBs commonly found in end of life electronics the differences betw Renewable materials and
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