The intensive use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in serious environmental problems due to its high solubility, volatility and recalcitrance. The feasibility of permeable reactive barriers (PRBs) with ZSM-5 type zeolite as a reactive medium was explored for MTBE contaminated groundwater remediation. Batch adsorption studies showed that the MTBE adsorption onto ZSM-5 follows the Langmuir model and obeys the pseudo-second-order model with an adsorption capacity of 53.55 mg·g^-1. The adsorption process reached equilibrium within 24 h, and MTBE was barely desorbed with initial MTBE concentration of 300 mg·L^-1. The mass transfer process is found to be primarily controlled by pore diffusion for MTBE concentrations from 100 to 600 mg·L^-1. pH has little effect on the maximum adsorption capacity in the pH range of 2-10, while the presence of nickel reduces the capacity with Ni concentrations of 2.5-25 mg·L^-1. In fixed-bed column tests, the Dose-Response model fits the breakthrough curve well, showing a saturation time of ~320 min and a removal capacity of ~18.71 mg·g^-1 under the conditions of this study. Therefore, ZSM-5 is an extremely effective adsorbent for MTBE removal and has a huge potential to be used as a reactive medium in PRBs.

甲基叔丁基醚（MTBE）作为汽油添加剂的大量使用由于其高溶解度，挥发性和难降解性而导致严重的环境问题。探索了以ZSM-5型沸石为反应介质的可渗透反应性屏障（PRB）用于MTBE污染的地下水修复的可行性。间歇吸附研究表明，MTBE在ZSM-5上的吸附遵循Langmuir模型，服从拟二级模型，吸附容量为53.55 mg·g ^-1。吸附过程在24 h内达到平衡，MTBE的初始浓度为300 mg·L ^-1时，MTBE几乎未解吸。发现传质过程主要受孔扩散控制，MTBE浓度从100到600 mg·L ^-1。在2-10的pH范围内，pH值对最大吸附容量影响很小，而当Ni的浓度为2.5-25 mg·L ^-1时，镍的存在会降低最大吸附容量。在固定床色谱柱测试中，剂量-响应模型很好地拟合了穿透曲线，在此研究条件下，饱和时间为〜320分钟，去除量为〜18.71 mg·g ^-1。因此，ZSM-5是去除MTBE的极其有效的吸附剂，在PRB中用作反应介质具有巨大的潜力。