期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 234, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2022.113378
关键词
Pydiflumetofen; Soil; Sorption-desorption; Migration; Mechanism of action
资金
- 13th Five-Year National Key Research Program of China [2017YFD0301604]
In this study, the adsorption and desorption behaviors of pydiflumetofen in different arable soils were investigated using infrared spectroscopy and batch equilibrium method. The results showed that the adsorption capacity of pydiflumetofen was positively correlated with soil organic matter and organic carbon content. Both high and low temperatures and the addition of certain chemicals affected the sorption property of the soil. Pydiflumetofen was found to be weakly mobile and leachable in most soils, posing a certain threat to surface soil and water organisms but not contaminating groundwater.
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 KF-ads were in the range of 14.592-102.610. The adsorption constants (KF-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.
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