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Adsorption–desorption of Atrazine with 9 Agricultural Soils in China

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Abstract

In this work, the characteristics and mechanisms for atrazine adsorption–desorption with 9 types of soils were investigated with batch equilibrium studies, elemental analyses, infrared spectroscopy, and UV‒visible spectroscopy. The atrazine sorption data for the 9 soils showed better fits with the Freundlich model than the Langmuir model, except with Red earth in Jiangxi (REJ) The results showed that the adsorption capacity was positively correlated with the organic matter (OM) content and negatively correlated with cation-exchange capacity (CEC) and pH. UV‒visible spectroscopy showed that dissolved organic matter (DOM) in the soil enhanced atrazine adsorption, but the adsorption on different DOM fractions was quite different. In addition, the infrared spectra revealed differences in the functional groups of soils and these functional groups may drive the adsorption process via hydrogen bonding and coordination with the -NH2 groups in atrazine.

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Acknowledgements

The study was supported by the Central Public-interest Scientific Institution Basal Research Fund of China (GYZX230104 and GYZX210502) and Jiangsu Province Key Research and Development Program (BE2022837). The authors thank anonymous reviewers for their comments on this article.

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Correspondence to Deyang Kong or Wenzhu Wu.

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Li, J., Cao, L., Xu, J. et al. Adsorption–desorption of Atrazine with 9 Agricultural Soils in China. Bull Environ Contam Toxicol 112, 32 (2024). https://doi.org/10.1007/s00128-023-03827-0

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  • DOI: https://doi.org/10.1007/s00128-023-03827-0

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