Phosphorus Release and Speciation in Manganese(IV) Oxide and Zeolite-Amended Flooded Soils

Attanayake, Chammi P.; Kumaragamage, Darshani; Amarawansha, Geethani; Hettiarachchi, Ganga M.; Indraratne, S. P.; Goltz, Douglas M.

doi:10.1021/acs.est.2c01185

Cited by 11 publications

(28 citation statements)

References 70 publications

(121 reference statements)

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Section: Soil and Materials Characterizationmentioning

confidence: 99%

“…This experiment was conducted with four soils (Dencross, Lakeland, Osborne, and Scanterbury soil series) using intact soil monoliths collected from agricultural fields in the Red River Valley of Manitoba in May 2019, as described in Attanayake et al (2022). Soil classification information, the analysis of basic properties of soils such as soil texture, pH, calcium carbonate equivalent, Mehlich-3 extractable metals (Ca, Mg, Al, Fe, Mn, As, and V), and cation exchange capacity methods were given in details in Attanayake et al (2022). Analysis of total As and V in MnO 2 , zeolite, and the four soil samples were conducted by one-step digestion using 0.25 g of soil/material with perchloric, nitric, and hydrofluoric acids and analyzed by inductively coupled plasma mass spectrometry (ICP-MS; Agilent 7900).…”

Section: Soil and Materials Characterizationmentioning

confidence: 99%

“…Because there was a difference in filter size between floodwater and pore water, floodwater would include more colloidal PTEs than pore water, which, however, allows comparisons of pore water (or floodwater) across flooding times and treatments. Further details of the collection of pore water and floodwater and pH measurements are given in Attanayake et al (2022). Water samples were acidified with 50 μl of concentrated nitric acid (trace metal grade) and stored at 4˚C to analyze for concentrations of Ca, Mg, Fe, Mn, Al, As, and V using ICP-AES spectroscopy (ICP-AES; Thermo iCAP 6500 Duo, Cambridge, UK).…”

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

“…The detection limits of ICP-AES were 0.030 and 0.001 mg L −1 for As and V, respectively. Anions (Cl − , Fl − , NO 3 − , PO 4 3− , and SO 4 2− ) were measured using ion chromatography, and alkalinities of pore water samples were assessed using the titrimetric method at 0, 4, and 8 weeks after flooding (WAF) (Attanayake et al, 2022). Anions and cations were measured within 2 weeks after the final sampling.…”

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

“…Osborne soil was selected for the X-ray diffractometry (XRD) characterization as both As and V showed a significant amendment effect after the addition of zeolite and MnO 2 . Further information on analysis is given at Attanayake et al (2022).…”

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

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

et al. 2023

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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 (<100 μg L−1), whereas aqueous V concentrations exceeded the threshold for sensitive aquatic species (2–80 μg L−1). MnO2‐amended soils were reduced to sub‐oxic levels, whereas zeolite‐amended and unamended soils were reduced to anoxic levels by 8 WAF. MnO2 decreased As and V mobilities, whereas zeolite had no effect on As but increased V mobility, compared to unamended soils. Arsenic mobility increased under anoxic conditions, and V mobility increased under oxic and alkaline pH conditions. Conversion of As(V) to As(III) and V(V) to V(IV) was regulated by MnO2 in flooded soils. MnO2 can be used as an amendment in immobilizing As and V, whereas the use of zeolite in flooded calcareous soils should be done cautiously.

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Section: Soil and Materials Characterizationmentioning

confidence: 99%

Section: Soil and Materials Characterizationmentioning

confidence: 99%

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

Section: Simulated Summer Flooding Experimentsmentioning

confidence: 99%

See 3 more Smart Citations

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

et al. 2023

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Alum reduced phosphorus release from flooded soils under cold spring weather conditions

et al. 2023

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The effectiveness of amendments such as alum [Al2(SO4)3·18H2O] in reducing phosphorus (P) loss to floodwater has been reported under summer conditions and laboratory‐controlled environments, but not under actual spring weather conditions in cold climate regions with high diurnal temperature variations when potential for P losses is high. The effectiveness of alum in reducing P release under Manitoba spring weather conditions was evaluated in a 42‐day experiment using 15‐cm soil monoliths from eight agricultural soils, which were unamended or alum‐amended (5 Mg ha−1) and flooded to a 10‐cm head. Dissolved reactive P (DRP) concentrations and pH of porewater and floodwater were determined on flooding day and every 7 days after flooding (DAF). Porewater and floodwater DRP concentrations in unamended soils increased 1.4‐ to 4.5‐fold, and 1.8‐ to 15.3‐fold, respectively, from 7 to 42 DAF. In alum‐amended soils, DRP concentrations averaged across soils was 43%–73% (1.0–2.0 mg L−1) lower in porewater, and 27%–64% (0.1–1.2 mg L−1) lower in floodwater than unamended soils during the flooding period. The reduction of DRP by alum was more pronounced under high fluctuating diurnal spring air temperature than with controlled air temperature (4°C) in a previous similar study. Acidic pH in porewater and floodwater due to alum did not persist over 7 days. This study showed that alum application is a viable option in reducing P released to floodwater in agricultural soils of cold regions where flooding‐induced P loss is prevalent in the spring.

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Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

Kumaragamage,

Hettiarachchi,

Amarakoon

et al. 2024

J of Env Quality

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Snowmelt runoff is a dominant pathway of phosphorus (P) losses from agricultural lands in cold climatic regions. Soil amendments effectively reduce P losses from soils by converting P to less soluble forms; however, changes in P speciation in cold climatic regions with fall‐applied amendments have not been investigated. This study evaluated P composition in soils from a manured field with fall‐amended alum (Al2(SO4)3·18H2O), gypsum (CaSO4·2H2O), or Epsom salt (MgSO4·7H2O) using three complementary methods: sequential P fractionation, scanning electron microscopy with energy‐dispersive X‐rays (SEM‐EDX) spectroscopy, and P K‐edge X‐ray absorption near‐edge structure spectroscopy (XANES). Plots were established in an annual crop field in southern Manitoba, Canada, with unamended and amended (2.5 Mg ha−1) treatments having four replicates in 2020 fall. Soil samples (0–10 cm) taken from each plot soon after spring snowmelt in 2021 were subjected to P fractionation. A composite soil sample for each treatment was analyzed using SEM‐EDX and XANES. Alum‐ and Epsom salt‐treated soils had significantly greater residual P fraction with a higher proportion of apatite‐like P and a correspondingly lower proportion of P sorbed to calcite (CaCO3) than unamended and gypsum‐amended soils. Backscattered electron imaging of SEM‐EDX revealed that alum‐ and Epsom salt‐amended treatments had P‐enriched microsites frequently associated with aluminum (Al), iron (Fe), magnesium (Mg), and calcium (Ca), which was not observed in other treatments. Induced precipitation of apatite‐like species may have been responsible for reduced P loss to snowmelt previously reported with fall application of amendments.

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Phosphorus Release and Speciation in Manganese(IV) Oxide and Zeolite-Amended Flooded Soils

Cited by 11 publications

References 70 publications

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

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

Alum reduced phosphorus release from flooded soils under cold spring weather conditions

Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

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