Adsorption-desorption and transport behavior of pydiflumetofen in eight different types of soil

Chuanfei Bian; Long Wang; Zongyin Cui; Zemin Dong; Xianluo Shi; Yuqi Li; Baotong Li

doi:10.1016/j.ecoenv.2022.113378

Adsorption-desorption and transport behavior of pydiflumetofen in eight different types of soil

Ecotoxicol Environ Saf. 2022 Apr 1:234:113378. doi: 10.1016/j.ecoenv.2022.113378. Epub 2022 Mar 4.

Authors

Chuanfei Bian¹, Long Wang¹, Zongyin Cui¹, Zemin Dong², Xianluo Shi³, Yuqi Li⁴, Baotong Li⁵

Affiliations

¹ College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.
² College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Technology Extension Center of Jiangxi Province, Nanchang 330046, China.
³ College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China; Jiangxi Water Resource Institute, Nanchang 330045, China.
⁴ School of Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
⁵ College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China. Electronic address: libt666@163.com.

PMID: 35255252
DOI: 10.1016/j.ecoenv.2022.113378

Abstract

Pydiflumetofen, a fungicide of the class of succinate dehydrogenase inhibitors, can disrupt energy metabolism by inhibiting the synthesis of succinate dehydrogenase, thus effectively inhibiting pathogenic fungal growth and related yield losses.We studied the adsorption and desorption behaviors and interaction mechanisms of pydiflumetofen in eight different arable soils by the infrared spectroscopy and batch equilibrium method. Pydiflumetofen adsorption and desorption property of soils conformed with the Freundlich isotherm model and the values for the adsorption capacity K_F-ads were in the range of 14.592-102.610. The adsorption constants (K_F-ads) exhibited a significantly positive and linear correlation (p < 0.1) with soil organic matter and organic carbon content. Both high and low temperatures weakened the pydiflumetofen sorption capacity of the soil. In addition, the initial pH of the solution, its ionic strength, and the addition of exogenous biochar, humic acid, and different types of surfactants at different concentrations also affected the sorption property of the soil. Pydiflumetofen is weakly mobile and leachable in most soils, and, poses some threat to surface soil and water organisms, but does not contaminate groundwater.

Keywords: Mechanism of action; Migration; Pydiflumetofen; Soil; Sorption-desorption.