Mobility of arsenic and vanadium in waterlogged calcareous soils due to addition of zeolite and manganese oxide amendments

Addition of manganese(IV) oxides (MnO2) and zeolite can affect the mobility of As and V in soils due to geochemical changes that have not been studied well in calcareous, flooded soils. This study evaluated the mobility of As and V in flooded soils surface‐amended with MnO2 or zeolite. A simulated s...

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Bibliographic Details
Published in:Journal of environmental quality 2023-03, Vol.52 (2), p.380-392
Main Authors: Indraratne, Srimathie P., Attanayake, Chammi P., Kumaragamage, Darshani, Amarawansha, Geethani, Goltz, Douglas M., Applin, Daniel M.
Format: Article
Language:English
Subjects:
Arsenic - analysis
Manganese Compounds
Oxidation-Reduction
Oxides
Soil
Soil Pollutants - analysis
Vanadium
Water
Zeolites
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Summary:Addition of manganese(IV) oxides (MnO2) and zeolite can affect the mobility of As and V in soils due to geochemical changes that have not been studied well in calcareous, flooded soils. This study evaluated the mobility of As and V in flooded soils surface‐amended with MnO2 or zeolite. A simulated summer flooding study was conducted for 8 weeks using intact soil columns from four calcareous soils. Redox potential was measured in soils, whereas pH, major cations, and As and V concentrations were measured biweekly in pore water and floodwater. Aqueous As and V species were modeled at 0, 4, and 8 weeks after flooding (WAF) using Visual MINTEQ modeling software with input parameters of redox potential, temperature, pH, total alkalinity, and concentrations of major cations and anions. Aqueous As concentrations were below the critical thresholds (
ISSN:0047-2425
1537-2537
DOI:10.1002/jeq2.20451