Tetramethylammonium (TMA⁺) exchanged montmorillonites (TMA-Mts) of various surfactant (TMA⁺) dosages were prepared, and the roles of TMA⁺ cations in the microstructure and dynamic benzene adsorption performance of TMA-Mts were investigated. TMA⁺ cations were intercalated into the interlayer space of montmorillonite (Mt), and they exhibited dual effects on the benzene adsorption by TMA-Mts. For one thing, the intercalated TMA⁺ cations arranged loosely, creating an interlayer microporous structure. The interlayer micropores were important benzene adsorption sites, and the dynamic benzene adsorption capacity (q value) positively correlated to the microporous surface area (S_micro). The optimized dosage of TMA⁺ was 1.5 times the cation exchange capacity of Mt itself, which resulted in a TMA-Mt with the largest S_micro and q values of 65.0 m²/g and 425.3 mg/g, respectively. On the other hand, the intercalated TMA⁺ cations could interact with benzene molecules, further increasing the benzene adsorption performance of TMA-Mt but decreasing the diffusion and mass transfer of benzene molecules through TMA-Mt. In addition, TMA-Mt displayed remarkable regenerability, with a recycling efficiency exceeding 90%. These results indicated that modifying montmorillonite with small quaternary ammonium cation is an effective strategy to enhance the adsorption of volatile organic compounds (VOCs) by Mt and the TMA-Mts are promising adsorbents for VOCs remediation.

制备了不同剂量的表面活性剂（TMA ⁺）的四甲基铵（TMA ⁺）交换蒙脱土（TMA-Mts），并研究了TMA ⁺阳离子在TMA-Mts的微观结构和动态苯吸附性能中的作用。TMA ⁺阳离子插入到蒙脱石（Mt）的层间空间中，它们对TMA-Mts吸附苯具有双重作用。一方面，插入的TMA ⁺阳离子排列松散，形成了层间微孔结构。层间微孔是重要的苯吸附位点，动态苯吸附能力（q值）与微孔表面积呈正相关（S _micro）。TMA ⁺的最佳剂量是Mt本身的阳离子交换容量的1.5倍，这导致TMA-Mt的最大S _micro和q值分别为65.0 m ² / g和425.3 mg / g。另一方面，插入式TMA ⁺阳离子可以与苯分子相互作用，从而进一步提高TMA-Mt对苯的吸附性能，但会降低苯分子通过TMA-Mt的扩散和传质。此外，TMA-Mt具有出色的可再生性，回收效率超过90％。这些结果表明，用小的季铵阳离子改性蒙脱石是增强Mt对挥发性有机化合物（VOC）的吸附的有效策略，而TMA-Mts是用于VOC修复的有希望的吸附剂。