Kinetic Modeling of Cr(VI) Reduction by nZVI in Soil: The Influence of Organic Matter and Manganese Oxide

• Published in: Bulletin of environmental contamination and toxicology Vol. 101; no. 6; pp. 692 - 697
• Main Authors: Di Palma, Luca, Verdone, Nicola, Vilardi, Giorgio
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2018; Springer Nature B.V
• Subjects: Aquatic Pollution; Chromium; Chromium - chemistry; Composition effects; Dissolved oxygen; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Hexavalent chromium; Industrial pollution; Iron; Iron - chemistry; Kinetics; Manganese; Manganese Compounds - chemistry; Manganese dioxide; Manganese oxides; model validation; Nanoparticles; Organic matter; Organic soils; Oxides - chemistry; Pollution; Reduction; soil; Soil - chemistry; soil composition; Soil contamination; Soil organic matter; Soil Pollutants - chemistry; Soil pollution; soil sampling; Soil Science & Conservation; Waste Water Technology; Water - chemistry; Water Management; Water Pollution Control; Kinetic-modeling; Cr(VI); nZVI; NOM; Manganese oxide
• ISSN: 0007-4861; 1432-0800; 1432-0800
• DOI: 10.1007/s00128-018-2394-5

The effect of soil composition on the reduction of hexavalent chromium (Cr(VI)) by zero valent iron nanoparticles was studied. A model was proposed, to investigate both the effect of manganese oxide and the simultaneous effect of manganese dioxide and soil organic matter on the kinetic of Cr(VI) reduction. Fe(0) nanoparticles consumption by the reaction with dissolved oxygen, water and soluble Cr(VI) was taken into account. The model was validated through experimental tests performed on soil samples collected at an industrial polluted site, and on artificially contaminated samples from the same site, in the presence of selected amount of leonardite.