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- Publisher Website: 10.1016/j.chemosphere.2018.09.121
- Scopus: eid_2-s2.0-85054609368
- PMID: 30265931
- WOS: WOS:000449891300028
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Article: Formation of Lead Ferrites for Immobilizing Hazardous Lead into Iron-Rich Ceramic Matrix
Title | Formation of Lead Ferrites for Immobilizing Hazardous Lead into Iron-Rich Ceramic Matrix |
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Authors | |
Keywords | Lead Stabilization Lead ferrite Mechanism Crystal transformation |
Issue Date | 2019 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphere |
Citation | Chemosphere, 2019, v. 214, p. 239-249 How to Cite? |
Abstract | A strategy of immobilizing lead in the framework of ferrite-ceramic matrix, to reduce its environmental hazard was explored in this study. The mechanisms of incorporating lead into lead ferrites (delta-phase (2PbO center dot Fe2O3), gamma-phase (PbO center dot(2-2.5)Fe2O3) and beta-phase (PbO center dot(5-6)Fe2O3)) was revealed by observing the phase transformation in the products. The beta-phase was dominantly formed at low temperature of 700-800 degrees C at Pb/Fe of 1/1 -1/3. The significant growth of gamma-phase was observed at 750-850 degrees C and Pb/Fe of 1/4-1/7. The beta-phase substantially formed at 900-1000 degrees C with Pb/Fe of 1/7-1/12. The transformation of delta-phase to gamma-phase and/or beta-phase indicated the destruction of delta-phase unit and reconstruction of gamma-phase and beta-phase units during sintering process. However, the transformation of gamma-phase into beta-phase suggested a structure conversion process, local structural changes arose as a consequence of the addition of Fe2O3. When comparing the leaching ability of delta-, gamma- and beta-phase, the results showed the superiority of beta-phase for lead immobilization over the longer leaching period. (C) 2018 Elsevier Ltd. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/274872 |
ISSN | 2023 Impact Factor: 8.1 2023 SCImago Journal Rankings: 1.806 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lu, X | - |
dc.contributor.author | Yang, J | - |
dc.contributor.author | Ning, XA | - |
dc.contributor.author | Shih, K | - |
dc.contributor.author | Wang, F | - |
dc.contributor.author | Chao, Y | - |
dc.date.accessioned | 2019-09-10T02:30:37Z | - |
dc.date.available | 2019-09-10T02:30:37Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Chemosphere, 2019, v. 214, p. 239-249 | - |
dc.identifier.issn | 0045-6535 | - |
dc.identifier.uri | http://hdl.handle.net/10722/274872 | - |
dc.description.abstract | A strategy of immobilizing lead in the framework of ferrite-ceramic matrix, to reduce its environmental hazard was explored in this study. The mechanisms of incorporating lead into lead ferrites (delta-phase (2PbO center dot Fe2O3), gamma-phase (PbO center dot(2-2.5)Fe2O3) and beta-phase (PbO center dot(5-6)Fe2O3)) was revealed by observing the phase transformation in the products. The beta-phase was dominantly formed at low temperature of 700-800 degrees C at Pb/Fe of 1/1 -1/3. The significant growth of gamma-phase was observed at 750-850 degrees C and Pb/Fe of 1/4-1/7. The beta-phase substantially formed at 900-1000 degrees C with Pb/Fe of 1/7-1/12. The transformation of delta-phase to gamma-phase and/or beta-phase indicated the destruction of delta-phase unit and reconstruction of gamma-phase and beta-phase units during sintering process. However, the transformation of gamma-phase into beta-phase suggested a structure conversion process, local structural changes arose as a consequence of the addition of Fe2O3. When comparing the leaching ability of delta-, gamma- and beta-phase, the results showed the superiority of beta-phase for lead immobilization over the longer leaching period. (C) 2018 Elsevier Ltd. All rights reserved. | - |
dc.language | eng | - |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphere | - |
dc.relation.ispartof | Chemosphere | - |
dc.subject | Lead | - |
dc.subject | Stabilization | - |
dc.subject | Lead ferrite | - |
dc.subject | Mechanism | - |
dc.subject | Crystal transformation | - |
dc.title | Formation of Lead Ferrites for Immobilizing Hazardous Lead into Iron-Rich Ceramic Matrix | - |
dc.type | Article | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.chemosphere.2018.09.121 | - |
dc.identifier.pmid | 30265931 | - |
dc.identifier.scopus | eid_2-s2.0-85054609368 | - |
dc.identifier.hkuros | 303606 | - |
dc.identifier.volume | 214 | - |
dc.identifier.spage | 239 | - |
dc.identifier.epage | 249 | - |
dc.identifier.isi | WOS:000449891300028 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0045-6535 | - |