Adsorption–desorption and leaching behavior of benzovindiflupyr in different soil types

• Published in: Ecotoxicology and environmental safety Vol. 282; p. 116724
• Main Authors: Chang, Hailong, Wu, Tianqi, Lin, Wei, Gu, Xiaoxue, Zhou, Rendan, Li, Yuqi, Li, Baotong
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Inc 01.09.2024; Elsevier
• Subjects: Adsorption–desorption; Benzovindiflupyr; Leaching behavior; Mechanism of action; Soil; Soil; Mechanism of action; Leaching behavior; Adsorption–desorption; Benzovindiflupyr
• ISSN: 0147-6513; 1090-2414; 1090-2414
• DOI: 10.1016/j.ecoenv.2024.116724

Benzovindiflupyr is a succinate dehydrogenase inhibitor fungicide that targets mitochondrial function for disease control. In this study, we investigated the adsorption–desorption and leaching behavior of benzovindiflupyr in eight soil types using the batch equilibrium method and the soil column leaching method. A Freundlich model (r2 > 0.9959) was used to better characterize the adsorption-desorption process in eight soil types, with adsorption coefficients (KF-ads) ranging from 2.303 to 17.886. KF-ads was significantly and positively correlated (p < 0.05) with the organic carbon content. High temperatures and increased initial pH of aqueous solutions led to a decrease in benzovindiflupyr adsorption in the soil. The adsorption was also influenced by factors such as ionic strength, humic acid, surfactant type, microplastic type, and particle size and concentration. Moreover, benzovindiflupyr exhibited low leachability in all four soils selected, but different leaching solutions affected the risk of benzovindiflupyr migration to groundwater. Overall, this study provides insights into the adsorption characteristics of benzovindiflupyr in different soils and provides key information for environmental risk assessment. [Display omitted] •Study of the adsorption-desorption and leaching behavior of benzovindiflupyr in soil.•The adsorption-desorption process can be better described by the Freundlich model.•First study of benzovindiflupyr adsorption on microplastic-soil mixtures.•Risk of benzovindiflupyr migration to groundwater as affected by drench solutions.•The adsorption mechanism of benzovindiflupyr in soil was evaluated.