The migration of highly concentrated pesticide solutions in the soil has been experimentally studied. A mathematical model of the diffusion process in the soil environment has been developed. Based on the mathematical model, a system of equations for calculating the duration and intensity of the process depending on environmental parameters was obtained. The dependence of the process velocity on the direction of the diffusion front is determined, and the diffusion coefficients, kinetic coefficients of the diffusion process and the diffusion front velocity were calculated. Environmental aspects of pesticide migration were analysed. The diffusion coefficient of glyphosate in the model soil environment is established. Under the experimental conditions, the diffusion coefficient value was D = 1.755×10-12 m2/s. The study results of the process of migration of the component up the soil profile indicate the mechanism of molecular diffusion of glyphosate in the soil environment. The results of experimental research and the solution of the mathematical model were used to model the migration process in the Comsol Multiphysics environment. Analysis of theoretical and experimental results showed that the developed model could be used to calculate the dynamics of the spread of the pesticide front in the soil with sufficient accuracy.
1. Ajiboye, T. O., Oladoye, P. O., Olanrewaju, C. A., & Akinsola, G. O. (2022). Organophosphorus Pesticides: Impacts, Detection and Removal Strategies. Environmental Nanotechnology, Monitoring & Management, 100655. https://doi.org/10.1016/j.talanta.2021.123093
https://doi.org/10.1016/j.talanta.2021.123093
2. Arias-Estévez, M., López-Periago, E., Martínez-Carballo, E., Simal-Gándara, J., Mejuto, J. C., & García-Río, L. (2008). The mobility and degradation of pesticides in soils and the pollution of groundwater resources. Agriculture, ecosystems & environment, 123(4), 247-260. doi: https://doi.org/10.1016/j.agee.2007.07.011
https://doi.org/10.1016/j.agee.2007.07.011
3. Borgohain, X., Boruah, A., Sarma, G. K., & Rashid, M. H. (2020). Rapid and highly high adsorption performance of porous MgO nanostructures for fluoride removal from water. Journal of Molecular Liquids, 305, 112799. doi: https://doi.org/10.1016/j.molliq.2020.112799
https://doi.org/10.1016/j.molliq.2020.112799
4. Hyvlud, A., Sabadash, V., Gumnitsky, J., & Ripak, N. (2019). Statics and kinetics of albumin adsorption by natural zeolite. Chemistry & Chemical Technology, 1(13), 95-100. doi: https://doi.org/10.23939/chcht13.01.095
https://doi.org/10.23939/chcht13.01.095
5. Jiang, M., Chattopadhyay, A. N., Geng, Y., & Rotello, V. M. (2022). An array-based nanosensor for detecting cellular responses in macrophages induced by femtomolar levels of pesticides. Chemical Communications, 58(17), 2890-2893. doi: https://doi.org/10.1039/D1CC07100A
https://doi.org/10.1039/D1CC07100A
6. Kang, D., Yu, X., & Ge, M. (2017). Morphology-dependent properties and adsorption performance of CeO2 for fluoride removal. Chemical Engineering Journal, 330, 36-43. doi: https://doi.org/10.1016/j.cej.2017.07.140
https://doi.org/10.1016/j.cej.2017.07.140
7. Lopes-Ferreira, M., Maleski, A. L. A., Balan-Lima, L., Bernardo, J. T. G., Hipolito, L. M., Seni-Silva, A. C., & Lima, C. (2022). Impact of pesticides on human health in the last six years in Brazil. International journal of environmental research and public health, 19(6), 3198. doi: https://doi.org/10.3390/ijerph19063198
https://doi.org/10.3390/ijerph19063198
8. Rajmohan, K. S., Chandrasekaran, R., & Varjani, S. (2020). A review of the occurrence of pesticides in the environment and current technologies for their remediation and management. Indian Journal of Microbiology, 60(2), 125-138. doi: https://doi.org/10.1007/s12088-019-00841-x
https://doi.org/10.1007/s12088-019-00841-x
9. Sabadash, V., Gumnytskyy, J., Mylianyk, O., & Romaniuk, L. (2017). Concurrent sorption of copper and chromium cations by natural zeolite. Environmental problems, 2(1), 33-36. Retrieved from https://science.lpnu.ua/sites/default/files/journal-paper/2017/oct/6413/...
10. Srivastav, A. L., Singh, P. K., Srivastava, V., & Sharma, Y. C. (2013). Application of a new adsorbent for fluoride removal from aqueous solutions. Journal of Hazardous materials, 263, 342-352. doi: https://doi.org/10.1016/j.jhazmat.2013.04.017
https://doi.org/10.1016/j.jhazmat.2013.04.017
11. Wongmaneepratip, W., Gao, X., & Yang, H. (2022). Effect of food processing on reduction and degradation pathway of pyrethroid pesticides in mackerel fillet (Scomberomorus commerson). Food Chemistry, 384, 132523. https://doi.org/10.1016/j.foodchem.2022.132523
https://doi.org/10.1016/j.foodchem.2022.132523
12. Yorlano, M. F., Demetrio, P. M., & Rimoldi, F. (2022). Riparian strips as attenuation zones for the toxicity of pesticides in agricultural surface runoff: Relative influence of herbaceous vegetation and terrain slope on toxicity attenuation of 2, 4-D. Science of The Total Environment, 807, 150655. doi: https://doi.org/10.1016/j.scitotenv.2021.150655
https://doi.org/10.1016/j.scitotenv.2021.150655