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Mobility of organotin pesticides: azocyclotin and cyhexatin in clayey and sandy soils from the Northern Paraná state—Brazil

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Abstract

Azocyclotin and cyhexatin are pesticides commonly used in mite control. However, these organotin compounds (OTC) are highly harmful to the aquatic ecosystem and supposedly mobile in the soil. In addition to not existing defined rules of use, few studies have been carried out on organotins’ behavior and environmental control. Liquid chromatography has been pointed out for the OTC quantitation because of gas chromatography’s thermal stability and derivatization limitations. Hence, a new high-performance liquid chromatography method with photodiode array detection was developed for quality assurance and quality control and environmental performance assessment purposes. Hysteresis index (HI) and mobilization factor were determined from sorption/desorption in sandy and clayey soils to assess mobility and environmental risk. Mobilization was observed for the two compounds by applying the dual-mode Freundlich–Langmuir model to the isotherms. Azocyclotin showed greater mobility, 23% and 19%, and HI of − 0.15 and 7.8 \(\times \) 10\(^{-4}\) for clayey and sandy soil samples, respectively. Although cyhexatin was practically immobile for both soil samples, it can be mobilized as an azocyclotin metabolite, increasing the environmental impact and risk for agricultural uses.

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  1. The main numerical results in this section can be generated from the MatLab script available at https://data.mendeley.com/datasets/2xz2w7w2jd/1. Ferreira Lima, Andre; Onishi, Bruno S. D.; Watanabe, Lycio S.; Santos, Maria Josefa; Abrao, Taufik (2021), “Mobility of organotin pesticides: azocyclotin and cyhexatin in clayey and sandy soils from the Northern Parana state - Brazil”, Mendeley Data, V1, https://doi.org/10.17632/2xz2w7w2jd.1

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Acknowledgements

The authors would like to thank Capes (Coordination for the Improvement of Higher Education Personnel) and State University of Londrina for their financial support and fellowships and the Spectroscopy Laboratory (LABESPEC), the Laboratory of X-ray Analysis (LARX) and the Analytical Instrumentation and Analytical Automation Development Laboratory (DIA) of UEL by FT-IR, XRD measurements and chromatography analysis

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The authors would like to thank Capes—Coordination for the Improvement of Higher Education Personnel for their financial support on fellowships.

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All the authors whose names appear on the submission: (1) made substantial contributions to the conception or design of the work; the acquisition, analysis, and interpretation of data, (2) drafted the work or revised it critically for important intellectual content, (3) approved the version to be published, and (4) agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

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Correspondence to Maria J. Santos.

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Lima, A.A.A., Onishi, B.S.D., Watanabe, L.S. et al. Mobility of organotin pesticides: azocyclotin and cyhexatin in clayey and sandy soils from the Northern Paraná state—Brazil. Environ Earth Sci 81, 236 (2022). https://doi.org/10.1007/s12665-022-10351-7

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