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- Title
DGT method for the in situ measurement of triazines and the desorption kinetics of atrazine in soil.
- Authors
Zheng, Siheng; Sheng, Feng; Gu, Cheng; Li, Yanying; Fang, Zhou; Luo, Jun
- Abstract
Triazines are frequently detected in nature water and agricultural soils worldwide. They are considered harmful to plants, animals, and the human health. In this study, diffusive gradients in thin films (DGT) method was developed for the assessment of several triazines. DGT device was used for the in situ measurement of atrazine in a pesticide factory and obtained reliable data. The atrazine concentrations measured by DGT, and solvent extraction method was in a constant ratio. The DIFS model was coupled with DGT technique to study the desorption kinetics of atrazine in four kinds of different soils. The yellow–brown soil was more inclined to adsorb atrazine than other three soils. 2_D DIFS model was used to obtain the partition coefficient for labile atrazine (Kdl), the values of the response time (Tc), and desorption/adsorption rates (k1 and k−1). The yellow–brown soil has a larger labile pool size, and a faster resupply speed of atrazine. The 1_D DIFS model was used to simulate the profiles of atrazine concentrations in soil solution and solid phase. The results show that the desorption of atrazine in soil was limited by kinetic limitation at short time, and was limited by the solid phase reservoir at long time.
- Subjects
ATRAZINE; DESORPTION kinetics; TRIAZINES; NOXIOUS weeds; SOLID solutions; SOLVENT extraction
- Publication
Environmental Science & Pollution Research, 2023, Vol 30, Issue 17, p51061
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-023-25985-8