| 杨文聪,于锐,吴霞,邵玟玥,周嘉,罗那那.四环素在苏打盐碱湿地土壤中的吸附解吸特性[J].农业环境科学学报,2025,44(10):2571-2578. |
| 四环素在苏打盐碱湿地土壤中的吸附解吸特性 |
| Adsorption and desorption characteristics of tetracycline in soda-alkali wetland soils |
| 投稿时间：2024-11-04 |
| DOI：10.11654/jaes.2024-0954 |
| 中文关键词: 苏打盐碱湿地土壤 四环素 吸附 解吸 滞后系数 |
| 英文关键词: soda-alkali wetland soil tetracycline adsorption desorption hysteresis coefficient |
| 基金项目:国家自然科学基金青年基金项目（42301134）；吉林省自然科学基金项目（202110101109JC，YDZJ202301ZYTS232） |
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| 中文摘要: |
| 为了研究苏打盐碱湿地土壤的吸附解吸特性，本研究以退化型、芦苇型、蒲草型苏打盐碱湿地土壤为对象，采取静态吸附实验的方法，探究苏打盐碱湿地土壤的吸附解吸特征。结果表明，3种盐碱化不同的苏打盐碱湿地土壤四环素最终吸附量大小顺序为蒲草型（490.9 mg·kg-1）>芦苇型（486.7 mg·kg-1）>退化型（471.9 mg·kg-1）。吸附动力学符合Elovich方程（R2=0.929~0.940），说明四环素在苏打盐碱湿地土壤中的吸附是非均相扩散吸附。等温吸附过程符合Freundlich方程（R20.910~0.995），表明非均相的多层吸附是影响四环素在苏打盐碱湿地土壤中吸附行为的关键机制。四环素在苏打盐碱湿地土壤上的解吸常数明显高于吸附常数，解吸过程存在明显的滞后现象，3种苏打盐碱湿地土壤滞后系数平均大小依次为退化型>芦苇型>蒲草型，表明四环素与退化型苏打盐碱湿地土壤结合紧密且最难解吸，在蒲草型土壤中最易解吸。土壤理化性质对四环素吸附特征及滞后系数有直接影响，解吸平衡受土壤盐碱化程度控制。研究证明了四环素在不同苏打盐碱湿地土壤可能存在潜在累积风险和危害。 |
| 英文摘要: |
| To investigate the adsorption and desorption characteristics of soda-alkali wetland soil, this paper selected degraded soda-alkali wetland soil, reed type soil and cattail type soil as the research object, and adopted static adsorption test method to explore the adsorption and desorption characteristics of soda-alkali wetland soil. The results showed that the final adsorption capacity of tetracycline in the three sodatic-alkaline wetlands with different salinization was in the order of cattail type（490.9 mg·kg-1）>reed type（486.7 mg·kg-1）>degraded type（471.9 mg · kg-1）. The adsorption kinetics accords with Elovich equation（R2=0.929-0.940）, indicating that the adsorption of tetracycline in soda-alkali wetland soil is heterogeneous diffusion adsorption, and the adsorption process may be uneven, which is a reaction process controlled by multiple actions. The isothermal adsorption process conforms to the Freundlich equation（R2=0.910-0.995）, indicating that heterogeneous multilayer adsorption is the key mechanism affecting the adsorption behavior of tetracycline in soda-alkali wetland soil. The desorption constant of tetracycline in soda-alkali wetland soil was significantly higher than the adsorption constant, and there was an obvious hysterescence phenomenon in the desorption process. The average hysterescence coefficient of the three soda-alkali wetlands was degraded type>reed type>cattail type, indicating that tetracycline was tightly bound and difficult to desorption in degraded soda-alkali wetland soil, while it was easiest to desorption in cattail type soil. Soil physical and chemical properties have direct effects on tetracycline adsorption characteristics and hysteresis coefficient, and desorption balance is controlled by soil salinization degree.This study demonstrated the potential cumulative risk and harm of tetracycline in different soda-alkali wetland soils. |
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