Feasibility study of the use of basic oxygen furnace sludge in a permeable reactive barrier.

Autor: Frade PR; Department of Environmental and Sanitary Engineering, Centro Universitário de Formiga (UNIFOR-MG), Formiga, Minas Gerais, 35570-000, Brazil., Notini L; Department of Environmental and Sanitary Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil., Santos SV; Department of Environmental and Sanitary Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil., Moreira RFPM; Department of Chemical Engineering and Food Engineering, Universidade Federal de Santa Catarina (UFSC), Florianópolis, Santa Catarina, 88040-970, Brazil., Leão MMD; Department of Environmental and Sanitary Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil., Amorim CC; Department of Environmental and Sanitary Engineering, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, 31270-901, Brazil. Electronic address: camila@desa.ufmg.br.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2018 Jun 05; Vol. 351, pp. 188-195. Date of Electronic Publication: 2018 Feb 18.
DOI: 10.1016/j.jhazmat.2018.02.035
Abstrakt: In this study, the steel manufacturing waste Basic Oxygen Furnace Sludge (BOFS) was tested as permeable reactive material for the remediation of soil contaminated with chromium. The material presents a high content of elemental iron and iron oxides typical of the steel manufacturing process. Here we propose a scheme of the chemical reactions responsible for remediation process including BOFS dissolution, Cr(VI) reduction and Cr(III) precipitation. Batch reactors showed that Cr(VI) removal increases as the pH decreases. Column tests demonstrated that the simulated PRB with BOFS as the reactive media was quite effective for removing Cr(VI) from groundwater, with a sorption capability of 0.213 mg Cr per gram of BOFS at an initial Cr(VI) concentration of 50 mg L -1 at pH 5.5. A long-term test lasting 71 days confirmed the proposed mechanisms and the suitability of using BOFS in a permeable reactive barrier.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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