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Total Germanium Recycling from Electronic and Optical Waste.
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SYSNO ASEP 0491882 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Total Germanium Recycling from Electronic and Optical Waste. Author(s) Bumba, Jakub (UCHP-M) SAI
Dytrych, Pavel (UCHP-M) RID, ORCID, SAI
Fajgar, Radek (UCHP-M) RID, ORCID, SAI
Kaštánek, František (UCHP-M) RID, SAI, ORCID
Šolcová, Olga (UCHP-M) RID, ORCID, SAISource Title Industrial and Engineering Chemistry Research. - : American Chemical Society - ISSN 0888-5885
Roč. 57, č. 27 (2018), s. 8855-8862Number of pages 8 s. Action ACS National Meeting /254./ Event date 20.08.2017 - 24.08.2017 VEvent location Washington, DC Country US - United States Event type WRD Language eng - English Country US - United States Keywords germanium ; recycling ; photovoltaic cells Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering R&D Projects GA15-14228S GA ČR - Czech Science Foundation (CSF) Institutional support UCHP-M - RVO:67985858 UT WOS 000439009400004 EID SCOPUS 85048356068 DOI 10.1021/acs.iecr.8b01237 Annotation The method of germanium and silicon regeneration from waste germanium lenses and photovoltaic cells was successfully verified. Preparation of magnesium germanide, magnesium silicide and their mixtures in an optimized semi-opened reactor was investigated in details. Obtained products were characterized by dispersive Raman spectroscopy, SEM/EDX and XRD, which confirmed high conversion, homogeneity and crystallinity of prepared products. The measured data, together with data obtained from literature, served as input parameters for a mathematical model. Subsequent hydrolysis of prepared products to obtain germanium and silicon hydrides was observed by FTIR and by GC/MS. Successful separation of hydrolysis products to individual hydrides was also performed. Magnesium hydrogen phosphate trihydrate, a desired fertilizer, and the only byproduct of the whole process, was crystalized out from hydrolysis residue with the purity of over 95 %. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2019
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