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Article: Incorporation mechanism of stabilizing simulated lead-laden sludge in aluminum-rich ceramics

TitleIncorporation mechanism of stabilizing simulated lead-laden sludge in aluminum-rich ceramics
Authors
KeywordsSludge
Lead
Stabilization
Leaching behavior
Issue Date2012
PublisherWorld Academy of Science, Engineering and Technology (WASET). The Journal's web site is located at http://www.waset.org/publications.php
Citation
World Academy of Science, Engineering & Technology, 2012, v. 69, p. 921-926 How to Cite?
AbstractThis study investigated a strategy of blending lead-laden sludge and Al-rich precursors to reduce the release of metals from the stabilized products. Using PbO as the simulated lead-laden sludge to sinter with γ-Al2O3 by Pb:Al molar ratios of 1:2 and 1:12, PbAl2O4 and PbAl12O19 were formed as final products during the sintering process, respectively. By firing the PbO + γ-Al2O3 mixtures with different Pb/Al molar ratios at 600 to 1000 °C, the lead transformation was determined through X-ray diffraction (XRD) data. In Pb/Al molar ratio of 1/2 system, the formation of PbAl2O4 is initiated at 700 °C, but an effective formation was observed above 750 °C. An intermediate phase, Pb9Al8O21, was detected in the temperature range of 800-900 °C. However, different incorporation behavior for sintering PbO with Al-rich precursors at a Pb/Al molar ratio of 1/12 was observed during the formation of PbAl12O19 in this system. In the sintering process, both temperature and time effect on the formation of PbAl2O4 and PbAl12O19 phases were estimated. Finally, a prolonged leaching test modified from the U.S. Environmental Protection Agency’s toxicity characteristic leaching procedure (TCLP) was used to evaluate the durability of PbO, Pb9Al8O21, PbAl2O4 and PbAl12O19 phases. Comparison for the leaching results of the four phases demonstrated the higher intrinsic resistance of PbAl12O19 against acid attack.
Persistent Identifierhttp://hdl.handle.net/10722/188778
ISSN
2014 SCImago Journal Rankings: 0.133

 

DC FieldValueLanguage
dc.contributor.authorLu, X-
dc.contributor.authorShih, K-
dc.date.accessioned2013-09-17T07:17:36Z-
dc.date.available2013-09-17T07:17:36Z-
dc.date.issued2012-
dc.identifier.citationWorld Academy of Science, Engineering & Technology, 2012, v. 69, p. 921-926-
dc.identifier.issn2010-376X-
dc.identifier.urihttp://hdl.handle.net/10722/188778-
dc.description.abstractThis study investigated a strategy of blending lead-laden sludge and Al-rich precursors to reduce the release of metals from the stabilized products. Using PbO as the simulated lead-laden sludge to sinter with γ-Al2O3 by Pb:Al molar ratios of 1:2 and 1:12, PbAl2O4 and PbAl12O19 were formed as final products during the sintering process, respectively. By firing the PbO + γ-Al2O3 mixtures with different Pb/Al molar ratios at 600 to 1000 °C, the lead transformation was determined through X-ray diffraction (XRD) data. In Pb/Al molar ratio of 1/2 system, the formation of PbAl2O4 is initiated at 700 °C, but an effective formation was observed above 750 °C. An intermediate phase, Pb9Al8O21, was detected in the temperature range of 800-900 °C. However, different incorporation behavior for sintering PbO with Al-rich precursors at a Pb/Al molar ratio of 1/12 was observed during the formation of PbAl12O19 in this system. In the sintering process, both temperature and time effect on the formation of PbAl2O4 and PbAl12O19 phases were estimated. Finally, a prolonged leaching test modified from the U.S. Environmental Protection Agency’s toxicity characteristic leaching procedure (TCLP) was used to evaluate the durability of PbO, Pb9Al8O21, PbAl2O4 and PbAl12O19 phases. Comparison for the leaching results of the four phases demonstrated the higher intrinsic resistance of PbAl12O19 against acid attack.-
dc.languageeng-
dc.publisherWorld Academy of Science, Engineering and Technology (WASET). The Journal's web site is located at http://www.waset.org/publications.php-
dc.relation.ispartofWorld Academy of Science, Engineering & Technology-
dc.subjectSludge-
dc.subjectLead-
dc.subjectStabilization-
dc.subjectLeaching behavior-
dc.titleIncorporation mechanism of stabilizing simulated lead-laden sludge in aluminum-rich ceramicsen_US
dc.typeArticleen_US
dc.identifier.emailShih, K: kshih@hkucc.hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.hkuros222362-
dc.identifier.volume69-
dc.identifier.spage921-
dc.identifier.epage926-
dc.publisher.placeTurkey-

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