农业环境科学学报2025，Vol.44Issue(10)：2571-2578,8.DOI:10.11654/jaes.2024-0954
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
摘要
Abstract
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.关键词
苏打盐碱湿地土壤/四环素/吸附/解吸/滞后系数Key words
soda-alkali wetland soil/tetracycline/adsorption/desorption/hysteresis coefficient分类
资源环境引用本文复制引用
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):2571-2578,8.基金项目
国家自然科学基金青年基金项目(42301134) （42301134）
吉林省自然科学基金项目(202110101109JC,YDZJ202301ZYTS232)Young Scientists Fund of the National Natural Science Foundation of China(42301134) （202110101109JC,YDZJ202301ZYTS232）
Natural Science Foundation of Jilin Province,China(202110101109JC,YDZJ202301ZYTS232) （202110101109JC,YDZJ202301ZYTS232）
