Beneficial Use of Steel Slag Fines to Immobilize Arsenite and Arsenate

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dc.contributor.author Grubb, D.
dc.contributor.author Wazne, Mahmoud
dc.contributor.author Jagupilla, S.
dc.contributor.author Malasavage, N.
dc.date.accessioned 2016-02-29T13:22:55Z
dc.date.available 2016-02-29T13:22:55Z
dc.date.issued 2016-02-29
dc.identifier.issn 2153-5493 en_US
dc.identifier.uri http://hdl.handle.net/10725/3214
dc.description.abstract This study presents the results of an extensive beneficial-use evaluation of -in. minus steel slag fines (SSF) to immobilize arsenic. Two primary sets of experiments were undertaken to assess (1) the ability of SSF to immobilize [Math Processing Error] arsenite ([Math Processing Error]) and arsenate ([Math Processing Error]) in dredged material when blended with SSF, including slag cement doses (up to 2%) to determine if additional environmental polishing was necessary; and (2) the ability of SSF alone to immobilize each [Math Processing Error] species. Visually, the SSF materials resemble an AASHTO No. 9 (fine) aggregate, with a small fraction passing the No. 200 (0.075 mm) sieve. In order to establish the design parameters for deploying the slag media in geoenvironmental applications (soil blending, drainage, reactive trenches, and filters), the soil classification and grain-size distribution, specific gravity, loss on ignition (ash content), standard and modified Proctor compaction behavior, direct shear strength, and swell behavior of the SSF media were evaluated. Additionally, the following geochemical attributes of the SSF media were evaluated: bulk chemistry, mineralogy, pH, anion scan, total priority pollutant list (PPL) metals, toxicity characteristic leaching procedure (TCLP), and synthetic precipitation leaching procedure (SPLP) leaching behavior for PPL metals. Arsenic thresholding studies were performed, in which the uptake of each [Math Processing Error] source on the SSF materials was evaluated. The SSF materials immobilized approximately [Math Processing Error] [Math Processing Error] and [Math Processing Error] [Math Processing Error], producing TCLP and SPLP concentrations less than [Math Processing Error] in three of four cases. X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies were used in combination with MINTEQ modeling to isolate the mechanisms responsible for the [Math Processing Error] immobilization in the SSF materials en_US
dc.language.iso en en_US
dc.title Beneficial Use of Steel Slag Fines to Immobilize Arsenite and Arsenate en_US
dc.type Article en_US
dc.description.version Published en_US
dc.title.subtitle Slag Characterization and Metal Thresholding Studies en_US
dc.author.school SOE en_US
dc.author.idnumber 201205627 en_US
dc.author.woa N/A en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal Journal of Hazardous, Toxic, and Radioactive Waste en_US
dc.journal.volume 15 en_US
dc.journal.issue 3 en_US
dc.article.pages 130-150 en_US
dc.keywords Arsenic en_US
dc.keywords Dredge spoil en_US
dc.keywords Slag en_US
dc.keywords Recycling en_US
dc.identifier.doi http://dx.doi.org/10.1061/(ASCE)HZ.1944-8376.0000077 en_US
dc.identifier.ctation Grubb, D. G., Wazne, M., Jagupilla, S. C., & Malasavage, N. E. (2011). Beneficial use of steel slag fines to immobilize arsenite and arsenate: slag characterization and metal thresholding studies. Journal of Hazardous, Toxic, and Radioactive Waste, 15(3), 130-150. en_US
dc.author.email mahmoud.wazne@lau.edu.lb
dc.identifier.url http://ascelibrary.org/doi/abs/10.1061/(ASCE)HZ.1944-8376.0000077

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