Journal article
Recovery of gold ions from discarded mobile phone leachate by solvent extraction and polymer inclusion membrane (PIM) based separation using an amic acid extractant
Fukiko Kubota, Riho Kono, Wataru Yoshida, Maha Sharaf, Spas D Kolev, Masahiro Goto
Separation and Purification Technology | Elsevier | Published : 2018
Abstract
This paper reports on the selective separation and recovery of gold ions from leachates of discarded mobile phones using liquid-liquid extraction and a polymer inclusion membrane (PIM) transport system. The collected mobile phones were crushed by a mill and the obtained powder was calcinated. After leaching with aqua regia, the metal composition of the leachate was analyzed by inductively coupled plasma atomic emission spectrometry (ICP-AES). The analysis results confirmed that the mobile phone waste contained 397 g/ton of gold. Liquid-liquid extraction and PIM-based separation procedures for the selective recovery of gold(III) from synthetic and actual leachates were developed. The extracti..
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Awarded by Japan Society for the Promotion of Science
Funding Acknowledgements
The authors express sincere thanks to Sibata Ind. Co. Ltd., Seishin Enterprise Co. Ltd. and Matsuda Sangyo Co. Ltd., Japan, for kindly providing leachates from crushed and milled discarded mobile phones. The authors also thank Ms Sachie Hikino for her assistance with the analysis of the metal content of the leachates. This work was supported by a Grant-in Aid for Scientific Research (No. JP16K06830) from the Ministry of Education, Science, Sports, and Culture of Japan, the Environment Research and Technology Development Fund (ERTDF, grant No. 3-1710) from the Ministry of the Environment Japan, and Open Partnership Joint Project of the Japanese Society for the Promotion of Science (Grant No. AJ179065 (29-9111-t13)).