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Atrazine behavior in an agricultural soil: adsorption–desorption, leaching, and bioaugmentation with Arthrobacter sp. strain AAC22

  • Soils, Sec 3 • Remediation and Management of Contaminated or Degraded Lands • Research Article
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Abstract

Purpose

To evaluate atrazine behavior in an agricultural soil (adsorption–desorption, leaching) and the effects of bioaugmentation with the Arthrobacter sp. strain AAC22, as a soil remediating strategy.

Material and methods

An agricultural soil with a history of atrazine application was used. Equilibrium batch experiments allowed the investigation of the adsorption–desorption of atrazine at different soil depths, while the atrazine leaching potential was assessed using disturbed soil columns. Arthrobacter sp. strain AAC22 was selected for bioaugmentation, to remove atrazine in soil microcosms. Removal efficiency was determined by a bioassay with oat seeds.

Results and discussion

Adsorption and desorption isotherms of atrazine at different soil depths were well described by the Freundlich equation (R2 > 0.99 and R2 > 0.98, respectively). The Freundlich constant (Kf) and desorption coefficient (Kfd1–3) decreased and increased, respectively, as soil depth increased. The Kf and Kfd1–3 values were correlated positively to organic carbon (r = 0.97) and negatively to pH (r =  − 0.93). In this soil, 70.2% of atrazine applied (2.5 kg ha−1) was recovered in the leachate and 7.6% remained in the soil column. The higher atrazine concentration leached can be explained by the negative hysteresis of adsorption–desorption in this soil. Bioaugmentation with AAC22 enhanced atrazine removal being nearly 70% after 2 days of treatment, and it was almost complete (> 99%) after 8 days. A bioassay demonstrated that bioaugmentation was successful and toxic by-products were not detected.

Conclusion

The adsorption–desorption and leaching experiments demonstrated the high mobility of the atrazine in the study soil. The bioaugmentation using the AAC22 strain is an effective strategy for atrazine removal in polluted soils.

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Data availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

References

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Acknowledgements

NU holds a doctoral grant from Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). This work was carried out with financial support from FONCyT (grant PICT Start up 0018/2016) and Instituto de Investigación, Universidad Nacional de Villa María. EA is a member of CONICET.

Funding

This research was financed by FONCyT (grant PICT Start up 0018/2016) and by the Instituto de Investigación, Universidad Nacional de Villa María (grant UNVM resolution N° 614/2018).

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Authors and Affiliations

Authors

Contributions

NU, RB, VM, EA, and CM conceived and designed the research. NU, RB, and VM contributed with material preparation, data collection, and analysis. NU and EA wrote the draft manuscript. All the authors read and approved the final manuscript.

Corresponding author

Correspondence to Elizabeth Agostini.

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Competing interests

The authors declare no competing interests.

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Responsible editor: Maria Manuela Abreu

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Urseler, N., Bachetti, R., Morgante, V. et al. Atrazine behavior in an agricultural soil: adsorption–desorption, leaching, and bioaugmentation with Arthrobacter sp. strain AAC22. J Soils Sediments 22, 93–108 (2022). https://doi.org/10.1007/s11368-021-03045-3

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  • DOI: https://doi.org/10.1007/s11368-021-03045-3

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