AI Article Synopsis
- - The study investigated how cyromazine, a chemical, is adsorbed by five different soil types from various regions in China, using batch equilibrium experiments.
- - The adsorption data aligns best with the Freundlich and Langmuir models, indicating different levels of cyromazine retention in the soils, with the highest binding occurring in Udic Isohumosols and Gleyic-Stagnic Anthrosols.
- - Results show a strong positive correlation between adsorption capacity (Kf values) and soil organic matter, and a significant negative correlation with soil pH, while the free energy of sorption suggests that the process is primarily physical rather than chemical.
Article Abstract
Batch equilibrium experiments were used to reveal cyromazine adsorption on five kinds of soils, namely Ali-Perudic Ferrosols collected from Yingtan of Jiangxi, Udic Argosols collected from Nanjing and Gleyic-Stagnic Anthrosols collected from Changshu of Jiangsu, Ustic Cambosols collected from Fengqiu of Henan, and Udic Isohumosols collected from Hailun of Heilongjiang. Results show that the experimental data are best described by the Freundlich and Langmuir model, while fitted successfully by the linear model. Different adsorption behaviors of Cyromazine are observed in the five tested soils, with the lgK(f) values varying from 1.6505 (cambosols), 1.6715 (argosols) and 1.7153 (ferrosols) to 2.4579 (anthrosols) and 2.6557 (isohumosols). Moreover, the Kf values are in a positive correlation to the OM of the soil (r = 0.989) but significantly negative correlated to soil pH (r = -0.938). The free energy of sorption ranged from -20.8 to -23.0 kJ/mol, indicated that the adsorption could be largely attributed to the physical adsorption.
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