中文摘要：

采用静态吸附实验研究了3类不同吸附性能的抗生素（四环素类、氟喹诺酮类、磺胺类抗生素）在北京市自然发育的表层土壤（0—20em）中的吸附动力学行为和剖面土壤（0—20、20—40、40—60、60—80、80—100am）中的吸附热力学行为．结果表明，3类抗生素在土壤中的吸附，呈现先快后慢的反应过程，均可以在24h趋于平衡；Elovich方程能很好地描述3类抗生素在土壤中的吸附动力学过程．不同种类抗生素在同一深度土层中的吸附系数（Kd）各不相同，吸附强弱顺序为：四环素类抗生素（503．1—5742L·k^-1）〉氟喹诺酮类抗生素（160．7—786．1L·kg^-1）〉磺胺类抗生素（3．173—7．893L·kg^-1）．同种抗生素在不同深度土层的配值也存在较大差异，其中四环素类相差2．5倍、氟喹诺酮类相差2．8—3．6倍、磺胺类相差1．1倍．抗生素自身性质的差异是影响其在土壤中吸附行为的主要因素．剖面土壤理化性质的差异也会对抗生素在土壤中的吸附行为造成一定影响，土壤阳离子交换量和有机质是其主要的影响因子．

英文摘要：

Based on static adsorption experiments, adsorption kinetic at the 0--20 cm soil profile and thermodynamic at the soil profiles （0--20, 20--40, 40--60, 60--80, 80--100 cm ） in Beijing of tetracyclines, fluoroquinolones and sulfonamides were conducted. Results showed that the three antibiotics could reach adsorption equilibrium after 24 h with initial rapid adsorption followed by slow inner diffusion processes. Elovich equations could fit well with their reaction kinetics. Adsorption coefficient Kd values of different antibiotics in the same soil layer were not identical, and followed a decreasing order of tetracycline antibiotics （503. 1--5742 L. kg-1 ） 〉 fluoroquinolone antibiotics （ 160.7--786. 1 L- kg-1 ） 〉 sulfonamide antibiotics （3. 173--7. 893 L＂ kg-l）. Adsorption coefficient Kd values of the same antibiotic in different soil layers were also different by 2.5 times, 2.8--3.6 times and 1.1 times for tetracyclines, fluoroquinolones and sulfonamides, respectively. Adsorption behaviors of antibiotics in the soil environment were mainly influenced by the properties of antibiotics. of antibiotics, cation exchange Soil physicochemical properties could have also influenced adsorption behaviors capacity and organic matter of soil were main factors.