Sodium montmorillonite nanoclay particles were modified by 3-aminopropyltrimetoxysilane using a physical vapor deposition method and applied for the simultaneous removal of Cd, Zn, Pb and Ni heavy metals from wastewater samples. Experiments were performed in both batch and column systems. Several parameters that influence the removal efficiency, such as the pH, contact time, amount of adsorbent, interfering ions, flow rate of sample passage and eluent solvent, were evaluated and optimized. The results showed that the adsorption isotherms obeyed Langmuir isotherms for all heavy metals. Also, interfering ions did not influenced the removal efficiency. Finally, modified nanoclay successfully could remove all heavy metals from real wastewater samples to near completeness.

采用物理气相沉积法对3-氨丙基三甲氧基硅烷改性钠蒙脱石纳米粘土颗粒，用于同时去除废水样品中的Cd、Zn、Pb和Ni重金属。实验在分批系统和柱系统中进行。对影响去除效率的几个参数，如pH、接触时间、吸附剂用量、干扰离子、样品通道流速和洗脱溶剂进行了评估和优化。结果表明，所有重金属的吸附等温线均服从朗缪尔等温线。此外，干扰离子并不影响去除效率。最后，改性纳米粘土成功地去除了真实废水样品中的所有重金属，接近完全。