期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 168, 期 2-3, 页码 1269-1273出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2009.03.007
关键词
PAH; Soil remediation; AOPs; Factorial design
资金
- French government
- Region Lorraine
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico CNPQ
- GISFI
- Laboratory for Soils and Environment
- LCPME Laboratory
Potassium permanganate, widely used in water treatment, has shown its applicability to reduce PAH contamination in groundwater and soils. The first stage to design a treatment at the site scale is the feasibility study at the bench scale, generally performed by means of batch experiments. The aim of the present contribution was to investigate the influence of two factors on PAH degradation in spiked soils, following the method of factorial designs. These factors were the weight ratio KMnO4/PAH and the reaction time. Three factorial designs were performed and batch experiments were run to study the degradation of phenanthrene and pyrene on soils spiked at different concentrations, between 700 and 2100 ring kg(-1). We showed that treatment with potassium permanganate significantly reduced PAH concentration, but pyrene was more recalcitrant than phenanthrene. Both variables had negative main effects and a positive two-factor interaction effect: increasing the weight ratio or the reaction time enhanced PAH degradation but the reduction produced by the two factors was lower than the sum of the individual contributions. The comparison of these results with results that we published previously under comparable conditions showed that Fenton's reagent was more efficient than potassium permanganate. (C) 2009 Elsevier B.V. All rights reserved.
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