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

RESUMEN

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.

MATERIALES

Referencia del producto

Marca

Descripción del producto

E5134

Sigma-Aldrich

Ácido etilenodiaminotetraacético disodium salt dihydrate, suitable for electrophoresis, for molecular biology, 99.0-101.0% (titration)

310050

Sigma-Aldrich

Iron(III) oxide, powder, <5 μm, ≥96%

12310

Sigma-Aldrich

Iron, ≥99%, reduced, powder (fine)

E8008

Sigma-Aldrich

Ethylenediaminetetraacetic acid solution, 0.02% in DPBS (0.5 mM), sterile-filtered, BioReagent, suitable for cell culture

E6758

Sigma-Aldrich

Ethylenediaminetetraacetic acid, anhydrous, crystalline, BioReagent, suitable for cell culture

431788

Sigma-Aldrich

Ethylenediaminetetraacetic acid, 99.995% trace metals basis

544884

Sigma-Aldrich

Iron(III) oxide, nanopowder, <50 nm particle size (BET)

323381

Sigma-Aldrich

Peróxido de hidrógeno solution, contains ~200 ppm acetanilide as stabilizer, 3 wt. % in H₂O

529311

Sigma-Aldrich

Iron(III) oxide, ≥99.995% trace metals basis

C3518

Sigma-Aldrich

Carbonyl iron, ≥97% Fe basis

1233009

USP

Ácido etilenodiaminotetraacético disodium salt dihydrate, United States Pharmacopeia (USP) Reference Standard

ED2SC

Sigma-Aldrich

Ethylenediaminetetraacetic acid calcium disodium salt hydrate

E6635

Sigma-Aldrich

Ácido etilenodiaminotetraacético disodium salt dihydrate, Sigma Grade, suitable for plant cell culture, 98.5-101.5%

44890

Sigma-Aldrich

Iron, puriss. p.a., carbonyl-Iron powder, low in magnesium and manganese compounds, ≥99.5% (RT)

E9884

Sigma-Aldrich

Ethylenediaminetetraacetic acid, ACS reagent, 99.4-100.6%, powder

413054

Sigma-Aldrich

Iron, granular, 10-40 mesh, >99.99% trace metals basis

E4884

Sigma-Aldrich

Ácido etilenodiaminotetraacético disodium salt dihydrate, ACS reagent, 99.0-101.0%

88597

Millipore

Peróxido de hidrógeno solution, 3%, suitable for microbiology

356808

Sigma-Aldrich

Iron, foil, thickness 0.1 mm, ≥99.9% trace metals basis

267945

Sigma-Aldrich

Iron, chips, 99.98% trace metals basis

356824

Sigma-Aldrich

Iron, wire, diam. 1.0 mm, ≥99.9% trace metals basis

E7889

Sigma-Aldrich

Ethylenediaminetetraacetic acid disodium salt solution, for molecular biology, 0.5 M in H₂O, DNase, RNase, NICKase and protease, none detected

EDS

Sigma-Aldrich

Ethylenediaminetetraacetic acid, anhydrous, BioUltra, ≥99% (titration)

03690

Sigma-Aldrich

Ethylenediaminetetraacetic acid disodium salt solution, BioUltra, for molecular biology, pH 8.0, ~0.5 M in H₂O

ED2SS

Sigma-Aldrich

Ácido etilenodiaminotetraacético disodium salt dihydrate, reagent grade, 98.5-101.5% (titration)

27285

Sigma-Aldrich

Ácido etilenodiaminotetraacético disodium salt dihydrate, meets analytical specification of Ph. Eur., BP, USP, FCC, 99.0-101.0%

Sigma-Aldrich

Ethylenediaminetetraacetic acid, purified grade, ≥98.5%, powder

GF45572474

Iron, foil, 100x100mm, thickness 0.25mm, hard, 99.5%

PHR1068

Supelco

Ácido etilenodiaminotetraacético disodium salt dihydrate, Pharmaceutical Secondary Standard; Certified Reference Material

338141

Sigma-Aldrich

Iron, foil, thickness 0.25 mm, ≥99.99% trace metals basis