Solidification/stabilization of arsenic salts: effects of long curetimes
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| Title: | Solidification/stabilization of arsenic salts: effects of long curetimes |
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| Authors: | Roy, A., Cartledge, F. K., Akhter, H., Tittlebaum, M. E. |
| Source: | Journal of Hazardous Materials. Apr1997, Vol. 52 Issue 2/3, p247. 0p. |
| Subjects: | Hazardous wastes, Solidification/stabilization |
| Abstract: | Leachability of AsIII and AsV from various solidification-stabilization (S/S) binders has been studied over a period of four years. Type I portland cement (OPC), both alone and mixed with a number of additives, results in toxicity characteristic leaching procedure (TCLP) leachabilities of |
| Copyright of Journal of Hazardous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 8198655 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Solidification/stabilization of arsenic salts: effects of long curetimes – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Roy%2C+A%2E%22">Roy, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Cartledge%2C+F%2E+K%2E%22">Cartledge, F. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Akhter%2C+H%2E%22">Akhter, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Tittlebaum%2C+M%2E+E%2E%22">Tittlebaum, M. E.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Hazardous+Materials%22">Journal of Hazardous Materials</searchLink>. Apr1997, Vol. 52 Issue 2/3, p247. 0p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Hazardous+wastes%22">Hazardous wastes</searchLink><br /><searchLink fieldCode="DE" term="%22Solidification%2Fstabilization%22">Solidification/stabilization</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Leachability of AsIII and AsV from various solidification-stabilization (S/S) binders has been studied over a period of four years. Type I portland cement (OPC), both alone and mixed with a number of additives, results in toxicity characteristic leaching procedure (TCLP) leachabilities of </= mg l- 1 for arsenite and</= 2 mg l-1 for arsenate. There is no appreciable change in leachability after 3 years of cure, compared with 28 days of cure. The combination of OPC and Class F fly ash as a binder results in substantially degraded performance, as measured by TCLP leachability. Furthermore, the OPC-FA-As mixtures show increasing leachability with time. These solidified products have been studied using powderX-ray diffraction (XRD), derivative thermal gravimetry (DTG) and solid-state magic angle spinning nuclear magnetic resonance spectroscopy(MAS-NMR). The, AsV salt, NaCaAsO4 - 7.5H2O, is identifiable by XRD in many of these samples, particularly when sodium arsenate is the model As waste, but even when sodium arsenite is the original form of As. The OPC-FA mixtures show substantial respeciation during long curing times. There is evidence for formation of stratlingite from XRD, and there is substantial conversion of octahedrally coordinated aluminum, which is the predominant form at28 days, to tetrahedrally coordinated aluminum at longer cure times,as shown by NMR. These matrix changes are correlated with increased leachability, although direct cause and effect cannot be established.These results emphasize the importance of long-term testing to identify specific combinations of S/S binders and wastes that are prone toundergo respeciation, and consequent leachability changes, after long cure times. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Hazardous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 0 StartPage: 247 Subjects: – SubjectFull: Hazardous wastes Type: general – SubjectFull: Solidification/stabilization Type: general Titles: – TitleFull: Solidification/stabilization of arsenic salts: effects of long curetimes Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Roy, A. – PersonEntity: Name: NameFull: Cartledge, F. K. – PersonEntity: Name: NameFull: Akhter, H. – PersonEntity: Name: NameFull: Tittlebaum, M. E. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr1997 Type: published Y: 1997 Identifiers: – Type: issn-print Value: 03043894 Numbering: – Type: volume Value: 52 – Type: issue Value: 2/3 Titles: – TitleFull: Journal of Hazardous Materials Type: main |
| ResultId | 1 |
