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  • Modified Fenton oxidation of diesel fuel in arctic soils rich in organic matter and iron.

Modified Fenton oxidation of diesel fuel in arctic soils rich in organic matter and iron.

Chemosphere (2014-07-30)
Mary K Sherwood, Daniel P Cassidy
ABSTRACT

Modified Fenton (MF) chemistry was tested in the laboratory to treat three diesel fuel-contaminated soils from the Canadian arctic rich in soil organic matter (SOM) and Fe oxides. Reactors were dosed with hydrogen peroxide (HP), and treatment was compared in reactors with SOM as the only chelate vs. reactors to which ethylenediaminetetraacetate (EDTA) was added. Concentrations of diesel fuel and HP were measured over time, and the oxidation of both diesel fuel and SOM were quantified in each soil. A distinct selectivity for oxidation of diesel fuel over SOM was observed. Reactors with EDTA showed significantly less diesel fuel oxidation and lower oxidant efficiency (diesel fuel oxidized/HP consumed) than reactors with SOM as the only chelate. The results from these studies demonstrate that MF chemistry can be an effective remedial tool for contaminated arctic soils, and challenge the traditional conceptual model that SOM reduces the efficiency of MF treatment through excessive scavenging of oxidant.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
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Ethylenediaminetetraacetic acid solution, 0.02% in DPBS (0.5 mM), sterile-filtered, BioReagent, suitable for cell culture
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Ethylenediaminetetraacetic acid disodium salt dihydrate, suitable for electrophoresis, for molecular biology, 99.0-101.0% (titration)
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Ethylenediaminetetraacetic acid disodium salt dihydrate, Sigma Grade, suitable for plant cell culture, 98.5-101.5%
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Ethylenediaminetetraacetic acid disodium salt dihydrate, 98.5-101.5%, BioUltra
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Ethylenediaminetetraacetic acid calcium disodium salt hydrate
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Ethylenediaminetetraacetic acid disodium salt dihydrate, meets analytical specification of Ph. Eur., BP, USP, FCC, 99.0-101.0%
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Iron, foil, not light tested, 25x25mm, thickness 0.002mm, 99.85%
Iron, rod, 1000mm, diameter 30mm, as drawn, 98+%
Iron, foil, 100x100mm, thickness 0.15mm, hard, 99.5%
Iron, foil, not light tested, 300x300mm, thickness 0.05mm, hard, 99.5%
Iron, foil, light tested, 100x100mm, thickness 0.0125mm, 99.85%
Iron, rod, 1000mm, diameter 12.7mm, as drawn, 98+%
Iron, rod, 50mm, diameter 12.7mm, as drawn, 99.95%
Iron, rod, 500mm, diameter 19mm, as drawn, soft ingot 99.8%
Iron, foil, light tested, 100x100mm, thickness 0.075mm, as rolled, 99.99+%
Iron, rod, 500mm, diameter 40mm, as drawn, armcO« soft ingot 99.8%
Iron, foil, 8mm disks, thickness 0.125mm, hard, 99.5%
Iron, foil, 50x50mm, thickness 0.5mm, hard, 99.5%
Iron, foil, 25x25mm, thickness 1.5mm, as rolled, 99.5%