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- Publisher Website: 10.1021/acs.est.0c00643
- Scopus: eid_2-s2.0-85085903959
- PMID: 32364717
- WOS: WOS:000538420500051
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Article: Pb Stabilization by a New Chemically Durable Orthophosphate Phase: Insights into the Molecular Mechanism with X-ray Structural Analysis
Title | Pb Stabilization by a New Chemically Durable Orthophosphate Phase: Insights into the Molecular Mechanism with X-ray Structural Analysis |
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Authors | |
Keywords | Crystalline structure Hexagonal structures Interaction mechanisms Piezoelectric technology Selected area electronic diffraction |
Issue Date | 2020 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag |
Citation | Environmental Science & Technology, 2020, v. 54 n. 11, p. 6937-6946 How to Cite? |
Abstract | The rapid progression of piezoelectric technology and the upgradation of electronic devices have resulted in a global increase in Pb-based piezoelectric ceramic materials. In this study, the feasibility of incorporating Pb into a PbZr(PO4)2 double orthophosphate structure was evaluated by investigating the interaction mechanism of the perovskite with phosphate. The unique combination of X-ray absorption spectroscopy, selected area electronic diffraction, and Pawley refinement revealed that Pb was incorporated into a hexagonal structure and tetra-coordinated with oxygen in the phosphate-treated product. The chemical durability was enhanced through the structural alterations via Zr− O−P and Pb−O−P bond linkages. The stable phase encapsulating both Pb and phosphate showed effectiveness not only in stabilizing Pb but also in inhibiting P release as a secondary pollution risk within a wide pH range (1 ≤ pH ≤ 13). Despite the excellent chemical durability of the robust PbZr(PO4)2 crystalline phase, the increased Ti doping amounts at the Zr site resulted in a slight decrease in the lattice parameters and further enhanced the Pb stabilization effect through the formation of PbZrxTi(1−x)(PO4)2 solid solutions. This study demonstrates that the newly robust crystalline structure, developed through a well-designed thermal treatment scheme, provides an effective strategy for the treatment of Pb frequently encountered in electronic wastes. |
Persistent Identifier | http://hdl.handle.net/10722/290875 |
ISSN | 2023 Impact Factor: 10.8 2023 SCImago Journal Rankings: 3.516 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhou, Y | - |
dc.contributor.author | Zhang, J | - |
dc.contributor.author | Liao, C | - |
dc.contributor.author | Chan, TS | - |
dc.contributor.author | Lu, YR | - |
dc.contributor.author | Chuang, YC | - |
dc.contributor.author | Chang, CK | - |
dc.contributor.author | Shih, K | - |
dc.date.accessioned | 2020-11-02T05:48:21Z | - |
dc.date.available | 2020-11-02T05:48:21Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Environmental Science & Technology, 2020, v. 54 n. 11, p. 6937-6946 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.uri | http://hdl.handle.net/10722/290875 | - |
dc.description.abstract | The rapid progression of piezoelectric technology and the upgradation of electronic devices have resulted in a global increase in Pb-based piezoelectric ceramic materials. In this study, the feasibility of incorporating Pb into a PbZr(PO4)2 double orthophosphate structure was evaluated by investigating the interaction mechanism of the perovskite with phosphate. The unique combination of X-ray absorption spectroscopy, selected area electronic diffraction, and Pawley refinement revealed that Pb was incorporated into a hexagonal structure and tetra-coordinated with oxygen in the phosphate-treated product. The chemical durability was enhanced through the structural alterations via Zr− O−P and Pb−O−P bond linkages. The stable phase encapsulating both Pb and phosphate showed effectiveness not only in stabilizing Pb but also in inhibiting P release as a secondary pollution risk within a wide pH range (1 ≤ pH ≤ 13). Despite the excellent chemical durability of the robust PbZr(PO4)2 crystalline phase, the increased Ti doping amounts at the Zr site resulted in a slight decrease in the lattice parameters and further enhanced the Pb stabilization effect through the formation of PbZrxTi(1−x)(PO4)2 solid solutions. This study demonstrates that the newly robust crystalline structure, developed through a well-designed thermal treatment scheme, provides an effective strategy for the treatment of Pb frequently encountered in electronic wastes. | - |
dc.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/esthag | - |
dc.relation.ispartof | Environmental Science & Technology | - |
dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html]. | - |
dc.subject | Crystalline structure | - |
dc.subject | Hexagonal structures | - |
dc.subject | Interaction mechanisms | - |
dc.subject | Piezoelectric technology | - |
dc.subject | Selected area electronic diffraction | - |
dc.title | Pb Stabilization by a New Chemically Durable Orthophosphate Phase: Insights into the Molecular Mechanism with X-ray Structural Analysis | - |
dc.type | Article | - |
dc.identifier.email | Zhou, Y: yzhou223@hku.hk | - |
dc.identifier.email | Liao, C: liaocz@hku.hk | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acs.est.0c00643 | - |
dc.identifier.pmid | 32364717 | - |
dc.identifier.scopus | eid_2-s2.0-85085903959 | - |
dc.identifier.hkuros | 318187 | - |
dc.identifier.volume | 54 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | 6937 | - |
dc.identifier.epage | 6946 | - |
dc.identifier.isi | WOS:000538420500051 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0013-936X | - |