Nanjing Institute of Environmental Science, Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing, 210042, China.
School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China.
Bull Environ Contam Toxicol. 2024 Jan 31;112(2):32. doi: 10.1007/s00128-023-03827-0.
In this work, the characteristics and mechanisms for atrazine adsorption-desorption with 9 types of soils were investigated with batch equilibrium studies, elemental analyses, infrared spectroscopy, and UV‒visible spectroscopy. The atrazine sorption data for the 9 soils showed better fits with the Freundlich model than the Langmuir model, except with Red earth in Jiangxi (REJ) The results showed that the adsorption capacity was positively correlated with the organic matter (OM) content and negatively correlated with cation-exchange capacity (CEC) and pH. UV‒visible spectroscopy showed that dissolved organic matter (DOM) in the soil enhanced atrazine adsorption, but the adsorption on different DOM fractions was quite different. In addition, the infrared spectra revealed differences in the functional groups of soils and these functional groups may drive the adsorption process via hydrogen bonding and coordination with the -NH groups in atrazine.
在这项工作中，通过批量平衡研究、元素分析、红外光谱和紫外-可见光谱，研究了 9 种土壤中莠去津的吸附-解吸特性和机制。9 种土壤的莠去津吸附数据与 Freundlich 模型的拟合优于 Langmuir 模型，但江西红壤（REJ）除外。结果表明，吸附容量与有机质（OM）含量呈正相关，与阳离子交换容量（CEC）和 pH 值呈负相关。紫外-可见光谱表明，土壤中溶解的有机物（DOM）增强了莠去津的吸附，但对不同 DOM 组分的吸附却有很大的不同。此外，红外光谱揭示了土壤中官能团的差异，这些官能团可能通过氢键和与莠去津中-NH 基团的配位作用来驱动吸附过程。
