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. 2023 Jan;42(1):46-59.
doi: 10.1002/etc.5509. Epub 2022 Dec 13.

Adsorption and Removal Kinetics of 2,4-Dinitroanisole and Nitrotriazolone in Contrasting Freshwater Sediments: Batch Study

Thivanka Ariyarathna  1   2 , Sydney Twarz  1 , Craig Tobias  1
Affiliations

Adsorption and Removal Kinetics of 2,4-Dinitroanisole and Nitrotriazolone in Contrasting Freshwater Sediments: Batch Study

Thivanka Ariyarathna et al. Environ Toxicol Chem. 2023 Jan.

Abstract

Environmental release of 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO) is of great concern due to high migration potential in the environment. In the present study we evaluated the adsorption and microbially-mediated removal kinetics of dissolved DNAN and NTO in contrasting freshwater sediments with different total organic carbon (TOC) content. River sand (low TOC), pond silt (high TOC), clay-rich lake sediment (low TOC), wetland silt (high TOC), carbonate sand (low TOC), and iron-rich clay (low TOC) were evaluated. Separate abiotic and biotic bench-top sediment slurry incubations were carried out at 23, 15, and 4 °C for DNAN and NTO. Experiments were conducted over 3 weeks. Time series aqueous samples and sediment samples collected at the end of the experiment were analyzed for DNAN and NTO concentrations. The DNAN compound equilibrated with sediment within the first 2 h after addition whereas NTO showed no adsorption. 2,4-Dinitroanisole adsorbed more onto fine-grained organic-rich sediments (Kd = 2-40 L kg-1 sed-1 ) than coarse-grained organic-poor sediments (Kd = 0.2-0.6 L kg-1 sed-1 ), and the TOC content and cation exchange capacity of sediment were reliable predictors for abiotic DNAN adsorption. Adsorption rate constants and equilibrium partitioning constants for DNAN were inversely proportional to temperature in all sediment types. The biotic removal half-life of DNAN was faster (t1/2 = 0.1-58 h) than that of NTO (t1/2 = 5-347 h) in all sediment slurries. Biotic removal rates (t1/2 = 0.1-58 h) were higher than abiotic rates (t1/2 = 0.3-107 h) for DNAN at 23 °C. Smaller grain size coupled with higher TOC content enhanced biotic NTO and DNAN removal in freshwater environments. Environ Toxicol Chem 2023;42:46-59. © 2022 SETAC.

Keywords: 2,4-Dinitroanisole; 3-Nitro-1,2,4-triazol-5-one; Adsorption; DNAN; NTO; environmental fate; freshwater sediments; microbial removal.

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References

REFERENCES

    1. Ariyarathna, T. , Vlahos, P. , Smith, R. W. , Fallis, S. , Groshens, T. , & Tobias, C. (2017). Biodegradation and mineralization of isotopically labeled TNT and RDX in anaerobic marine sediments. Environmental Toxicology and Chemistry, 36, 1170-1180.
    1. Ariyarathna, T. , Vlahos, P. , Tobias, C. , & Smith, R. (2015). Sorption kinetics of TNT and RDX in anaerobic freshwater and marine sediments: Batch studies. Environmental Toxicology and Chemistry, 35, 47-55.
    1. Ariyarathna, T. , Ballentine, M. , Vlahos, P. , Smith, R. W. , Cooper, C. , Böhlke, J. L. , Fallis, S. , Groshens, T. J. , & Tobias, C. (2020). Degradation of RDX (Hexahydro-1,3,5-trinitro-1,3,5-triazine) in contrasting coastal marine habitats: Subtidal non-vegetated (sand), subtidal vegetated (silt/eel grass), and intertidal marsh. Science of the Total Environment, 745, 140800.
    1. Arthur, J. D. , Mark, N. W. , Taylor, S. , Šimunek, J. , Brusseau, M. L. , & Dontsova, K. M. (2017). Batch soil adsorption and column transport studies of 2,4-dinitroanisole (DNAN) in soils. Journal of Contaminant Hydrology, 199, 14-23.
    1. Brannon, J. M. , Price, C. B. , Yost, S. L. , Hayes, C. , & Porter, B. (2005). Comparison of environmental fate and transport process descriptors of explosives in saline and freshwater systems. Marine Pollution Bulletin, 50, 247-251.

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