岩矿测试2025，Vol.44Issue(5)：911-925,15.DOI:10.15898/j.ykcs.202503290065
土壤中氨氮与典型抗生素的吸附-解吸相互作用特征研究
Adsorption-Desorption Interaction Characteristics of Ammonium Nitrogen and Typical Antibiotics in Soil
摘要
Abstract
Conventional pollutants like nitrogen and emerging contaminants such as antibiotics are widely detected in soil and water,and exhibit combined pollution characteristics.Meanwhile,nitrogen and antibiotics migrate together during infiltration and are influenced by adsorption-desorption behaviors in soil.However,existing studies have mainly focused on the adsorption-desorption behaviors of single nitrogen or antibiotics,with fewer studies focused on the adsorption-desorption interactions between nitrogen and antibiotics.To address this gap,the adsorption-desorption dynamics of NH4+-N coexisting with two antibiotics—ciprofloxacin(CIP)and tylosin(TYL)—were investigated by batch equilibrium experiments in this study.The isothermal adsorption data were simulated by Langmuir,Freundlich,and linear models,with the Langmuir model(R2＞0.99)being more suitable than the Freundlich and linear models to describe the adsorption of NH4+-N.The increase of CIP concentration inhibited the adsorption of NH4+-N,but no significant influence was observed on the adsorption of NH4+-N with the increasing of TYL concentration.The isothermal adsorption characteristics of CIP and TYL were a better fit for the Freundlich model(R2＞0.99).The increase of NH4+-N concentration inhibited the adsorption of CIP,whereas adsorption of TYL was promoted by lower NH4+-N concentration but inhibited at higher concentration.The hysteresis index(HI)reflects the irreversibility of adsorbate retention on adsorbents during desorption.After calculating the HI of NH4+-N,CIP and TYL,it was found that NH4+-N exhibited an HI range of 0.370-2.306,whereas the HI values of both CIP and TYL were below 0.7,indicating significant desorption hysteresis.This suggests that CIP and TYL are prone to remain in soil and form persistent residues.The results of this study revealed the adsorption-desorption interaction characteristics between NH4+-N,CIP,and TYL,providing fundamental data to further understanding the environmental behaviors of nitrogen and antibiotics in soil.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202503290065.关键词
环丙沙星/泰乐菌素/氨氮/渗流/吸附-解吸/高效液相色谱法Key words
ciprofloxacin/tylosin/ammonium nitrogen/infiltration/adsorption-desorption/high performance liquid chromatography分类
环境科学引用本文复制引用
马慧婷,李京芳,刘菲,陈亮..土壤中氨氮与典型抗生素的吸附-解吸相互作用特征研究[J].岩矿测试,2025,44(5):911-925,15.基金项目
国家自然科学基金面上项目"典型木本植物根系强化包气带非均质性影响下渗流过程中水量水质耦合响应机制研究(42277046,2023-2026) （42277046,2023-2026）
