Evaluation of the Fenton process effectiveness in the remediation of soils contaminated by gasoline: Effect of soil physicochemical properties.

Autor: Santos A; Departamento de Química, Universidade Federal do Paraná, C.P. 19032, 81531-980 Curitiba, Brazil. Electronic address: alecsandrads@hotmail.com., Firak DS; Departamento de Química, Universidade Federal do Paraná, C.P. 19032, 81531-980 Curitiba, Brazil., Emmel A; Instituto SENAI-PR de Tecnologia em Meio Ambiente e Química, 81.310-000 Curitiba, Brazil., Siedlecki K; Mineropar - Serviço Geológico do Paraná, 82630-900 Curitiba, Brazil., Lopes A; Laboratório de Análises de Combustíveis Automotivos- LACAUTs, Universidade Federal do Paraná, 81531-980 Curitiba, Brazil., Peralta-Zamora P; Departamento de Química, Universidade Federal do Paraná, C.P. 19032, 81531-980 Curitiba, Brazil.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2018 Sep; Vol. 207, pp. 154-161. Date of Electronic Publication: 2018 May 15.
DOI: 10.1016/j.chemosphere.2018.05.087
Abstrakt: The remediation of four different soils contaminated by gasoline was performed using Fenton processes. Herein, the effect of the main physicochemical characteristics of the soils in the Fenton performance is emphasized. Fenton processes were applied in a column system, with and without addition of soluble iron (II), using undisturbed soil samples collected in four regions of the Paraná State (Brazil). Two groups of contaminants were monitored during the remediation process: BTEX (benzene, toluene, ethylbenzene and xylenes) and TRHs (total recoverable hydrocarbons). Superior degradation efficiencies were observed in the soils with elevated mineral iron content (Red Argisol, Red-Yellow Argisol and Red Latosol), while the soils with low iron content (Spodosol) presented comparable degradation efficiencies only in the presence of soluble Fe 2+ . Although the presence of mineral iron enabled the Fenton processes, a good correlation between the iron content and the degradation efficiency was not observed, suggesting a dependence on the chemical nature of the native iron. BTEX leaching was observed in all systems, suggesting that the process should be applied with caution, especially in soils with high drainage.
(Copyright © 2018 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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