HA(腐殖酸)是土壤和沉积物中有机质的重要组成部分,能在很大程度上影响有机污染物的环境行为和毒理效应.采用批量平衡法研究了BT(苯并三唑)在HA上的吸附动力学、等温吸附和吸附热力学等内容,结果表明:拟二级动力学能较好地描述BT在HA上的吸附行为,吸附过程分为快速吸附阶段和慢速吸附阶段,但主要以快速吸附为主;0~40 min为快速吸附阶段,吸附总量占平衡吸附量的89.0%以上.吸附等温线较好地符合Freundlich模型,R2均在0.999 6以上.初始ρ(BT)为300.0 mgL时,温度由288.15 K升至308.15 K,吸附量从15.70 gkg降至11.58 gkg,减少了26.24%.此外,ΔH0(吸附焓变)为-30.19kJmol,说明吸附过程为放热反应;ΔG0(吉布斯自由能变)小于零,说明反应是自发的.吸附反应的Ea(活化能)为19.35 kJmol,表明吸附属于物理吸附. HA (humic acid) is an important component of organic matter in soils and sediments, and can largely affect the environmental and toxicological effects of organic pollutants.Using the batch equilibrium method, the effect of BT (benzotriazole) on HA adsorption kinetics, isothermal adsorption and thermodynamics of adsorption. The results show that quasi-second-order kinetics can well describe the adsorption behavior of BT on HA. The adsorption process is divided into rapid adsorption phase and slow adsorption phase. The adsorption isotherms are dominated by fast adsorption, and the adsorption is 0 ~ 40 min, which is above 89.0% of the equilibrium adsorption.The adsorption isotherms agree well with the Freundlich model, with R2 above 0.999 6. The initial ρ (BT) Was 300.0 mgL, the temperature rose from 288.15 K to 308.15 K, the adsorption decreased from 15.70 gkg to 11.58 gkg, a decrease of 26.24% .In addition, ΔH0 (enthalpy of adsorption) was -30.19kJmol, Indicating that the adsorption process is an exothermic reaction; ΔG0 (Gibbs free energy change) less than zero, indicating that the reaction is spontaneous.The adsorption reaction Ea (activation energy) of 19.35 kJmol, indicating that the adsorption belongs to physical adsorption.