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Degradation and residue dynamics of fluazinam in diverse indian soil types and water pH conditions: a comprehensive study using kinetic models

Mukhopadhyay, Soumyadeep; Mandal, Jajati; Kanrar, Bappaditya; Chatterjee, Debasish; Bhattacharyya, Anajan; Majumder, Santanu

Degradation and residue dynamics of fluazinam in diverse indian soil types and water pH conditions: a comprehensive study using kinetic models Thumbnail


Authors

Soumyadeep Mukhopadhyay

Bappaditya Kanrar

Debasish Chatterjee

Anajan Bhattacharyya

Santanu Majumder



Abstract

Fluazinam a promising fungicide, is not yet registered in India. Consequently it is important to study the dissipation of its specific formulation in Indian soil and water. This study focuses on the degradation and residue dynamics of Fluazinam (40% SC) in different soil types (alluvial, lateritic, coastal saline and black) and water pH (4.0, 7.0, 9.2). Adsorption kinetic models suggested that the half-life period (days) varies among soils following the order lateritic (Jhargram), 54.07 > alluvial (Mohanpur), 45.10 > coastal saline (Canning), 28.33 > black (Pune) 26.18. These differences are attributed to soil pH and organic carbon (OC) content, where higher pH levels reduce pesticide adsorption, leading to quicker dissipation, while higher organic carbon content provides more binding sites, slowing down the process. The first order kinetics explained the dissipation better compared to second order model across all soil types. The study also found that the half-life of was lowest at pH 9.2, as compared to pH 7.0, and very high stability at pH 4.0. Additionally, the study introduces an interactive R-based tool for analysing dissipation kinetics and half-life of different pesticides offering a valuable resource for researchers and stakeholders.

Citation

Mukhopadhyay, S., Mandal, J., Kanrar, B., Chatterjee, D., Bhattacharyya, A., & Majumder, S. (in press). Degradation and residue dynamics of fluazinam in diverse indian soil types and water pH conditions: a comprehensive study using kinetic models. Frontiers in Environmental Science, 12, 1394847. https://doi.org/10.3389/fenvs.2024.1394847

Journal Article Type Article
Acceptance Date Jun 11, 2024
Online Publication Date Jun 27, 2024
Deposit Date Jun 19, 2024
Publicly Available Date Jun 27, 2024
Journal Frontiers in Environmental Science
Publisher Frontiers Media
Peer Reviewed Peer Reviewed
Volume 12
Pages 1394847
DOI https://doi.org/10.3389/fenvs.2024.1394847
Keywords dissipation kinetics, pesticides, soil, fluazinam, water

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