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Article: Lead Extraction from Cathode Ray Tube (CRT) Funnel glass: Reaction Mechanisms in Thermal Reduction with Addition of Carbon (C)

TitleLead Extraction from Cathode Ray Tube (CRT) Funnel glass: Reaction Mechanisms in Thermal Reduction with Addition of Carbon (C)
Authors
KeywordsCathode Ray Tube (CRT)
Funnel glass
Lead recovery
Quantitative X-ray diffraction
Thermal reduction
Issue Date2018
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/wasman
Citation
Waste Management, 2018, v. 76, p. 671-678 How to Cite?
AbstractThis study quantitatively determined the extraction of lead from CRT funnel glass and examined the mechanisms of thermally reducing lead in the products of sintering Pb-glass with carbon in the pre-heated furnace. The experimentally derived results indicate that a 90.3 wt% lead extraction efficiency can be achieved with 20 wt% of C addition at 950 °C for 3 min under air. The formation of viscous semi-liquid glass blocked the oxygen supply between the interaction of C and Pb-glass, and was highly effective for the extraction of metallic Pb. A maximum of 87.3% lead recover was obtained with a C to Na2CO3 ratio of 1/3 at 1200 °C. The decrease of C/Na2CO3 ratio enhanced the metallic lead recovery by increasing the glass viscosity for effective sedimentation of metallic lead in the bottom. However, with the further increase of temperature and treatment time, re-vitrification of lead back to silicate-glass matrix was detected in both Pb-glass/C and Pb-glass/C/Na2CO3 systems. The findings indicated that with proper controls, using C as an inexpensive reagent can effectively reduce treatment time and energy, which is crucial to a waste-to-resource technology for economically recovering lead from the waste CRT glass.
Persistent Identifierhttp://hdl.handle.net/10722/262306
ISSN
2017 Impact Factor: 4.723
2015 SCImago Journal Rankings: 1.764
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLu, X-
dc.contributor.authorNing, X-
dc.contributor.authorChen, D-
dc.contributor.authorChuang, KH-
dc.contributor.authorShih, K-
dc.contributor.authorWang, F-
dc.date.accessioned2018-09-28T04:57:02Z-
dc.date.available2018-09-28T04:57:02Z-
dc.date.issued2018-
dc.identifier.citationWaste Management, 2018, v. 76, p. 671-678-
dc.identifier.issn0956-053X-
dc.identifier.urihttp://hdl.handle.net/10722/262306-
dc.description.abstractThis study quantitatively determined the extraction of lead from CRT funnel glass and examined the mechanisms of thermally reducing lead in the products of sintering Pb-glass with carbon in the pre-heated furnace. The experimentally derived results indicate that a 90.3 wt% lead extraction efficiency can be achieved with 20 wt% of C addition at 950 °C for 3 min under air. The formation of viscous semi-liquid glass blocked the oxygen supply between the interaction of C and Pb-glass, and was highly effective for the extraction of metallic Pb. A maximum of 87.3% lead recover was obtained with a C to Na2CO3 ratio of 1/3 at 1200 °C. The decrease of C/Na2CO3 ratio enhanced the metallic lead recovery by increasing the glass viscosity for effective sedimentation of metallic lead in the bottom. However, with the further increase of temperature and treatment time, re-vitrification of lead back to silicate-glass matrix was detected in both Pb-glass/C and Pb-glass/C/Na2CO3 systems. The findings indicated that with proper controls, using C as an inexpensive reagent can effectively reduce treatment time and energy, which is crucial to a waste-to-resource technology for economically recovering lead from the waste CRT glass.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/wasman-
dc.relation.ispartofWaste Management-
dc.subjectCathode Ray Tube (CRT)-
dc.subjectFunnel glass-
dc.subjectLead recovery-
dc.subjectQuantitative X-ray diffraction-
dc.subjectThermal reduction-
dc.titleLead Extraction from Cathode Ray Tube (CRT) Funnel glass: Reaction Mechanisms in Thermal Reduction with Addition of Carbon (C)-
dc.typeArticle-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.wasman.2018.04.010-
dc.identifier.pmid29650298-
dc.identifier.scopuseid_2-s2.0-85045118553-
dc.identifier.hkuros292707-
dc.identifier.volume76-
dc.identifier.spage671-
dc.identifier.epage678-
dc.identifier.isiWOS:000435064000067-
dc.publisher.placeUnited Kingdom-

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