DC Field | Value | Language |
---|---|---|
dc.contributor.author | Son, Jieun | ko |
dc.contributor.author | Hong, Yeongran | ko |
dc.contributor.author | Han, Gyeol | ko |
dc.contributor.author | Nguyen, Thien S. | ko |
dc.contributor.author | Yavuz, Cafer T. | ko |
dc.contributor.author | Han, Jong-In | ko |
dc.date.accessioned | 2020-01-20T06:20:07Z | - |
dc.date.available | 2020-01-20T06:20:07Z | - |
dc.date.created | 2019-11-07 | - |
dc.date.created | 2019-11-07 | - |
dc.date.issued | 2020-02 | - |
dc.identifier.citation | SCIENCE OF THE TOTAL ENVIRONMENT, v.704 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/10203/271589 | - |
dc.description.abstract | Electronic wastes containing precious metals have great potential as a sustainable source of such metals. Separation and refining, however, remain complicated, and none of the existing technologies have yet experienced commercialization. A novel porphyrin-based porous polymer, named COP-180, was recently introduced as a powerful adsorbent option, especially for gold, and in this study, aspects of desorption and recovery of adsorbed gold and regeneration of the polymer were investigated. A hydrometallurgical method using non-cyanide leaching agents was developed, and an acid thiourea-based solution was found to be particularly suited for the method based on COP-180 with gold desorption efficiency of 97%. Fourier-transform infrared spectroscopy spectra demonstrated the unaffected structure of COP-180 after desorption, implying the potential of its reuse. This high desorption efficiency was achieved even without typical aiding agents by means of a formamidine disulfide-mediated route that prevented thiourea consumption, which is considered a major drawback of the otherwise promising reagent. Using this method, the polymer was able to maintain more than 94% desorption efficiency after five times of regeneration. The results suggest that acid thiourea can offer a workable means of recovering gold particularly from the excellent gold-adsorbent of COP-180, and that repeated regeneration is also possible. (C) 2019 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER | - |
dc.title | Gold recovery using porphyrin-based polymer from electronic wastes: Gold desorption and adsorbent regeneration | - |
dc.type | Article | - |
dc.identifier.wosid | 000504672800068 | - |
dc.identifier.scopusid | 2-s2.0-85076602716 | - |
dc.type.rims | ART | - |
dc.citation.volume | 704 | - |
dc.citation.publicationname | SCIENCE OF THE TOTAL ENVIRONMENT | - |
dc.identifier.doi | 10.1016/j.scitotenv.2019.135405 | - |
dc.contributor.localauthor | Yavuz, Cafer T. | - |
dc.contributor.localauthor | Han, Jong-In | - |
dc.contributor.nonIdAuthor | Nguyen, Thien S. | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Gold recovery | - |
dc.subject.keywordAuthor | Electronic wastes | - |
dc.subject.keywordAuthor | Desorption | - |
dc.subject.keywordAuthor | Thiourea | - |
dc.subject.keywordAuthor | Regeneration | - |
dc.subject.keywordPlus | PRINTED-CIRCUIT BOARDS | - |
dc.subject.keywordPlus | PRECIOUS METALS | - |
dc.subject.keywordPlus | CYANIDE | - |
dc.subject.keywordPlus | AU(III) | - |
dc.subject.keywordPlus | SILVER | - |
dc.subject.keywordPlus | IONS | - |
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