A Na⁺ exchanged montmorillonite clay (Na–Mt) and its organoclay derivatives prepared with benzyldimethyltetradecylammonium (BDTA) cationic and polyoxyethylene (20)oleyl-ether (Brij-O20) non-ionic surfactants were used for first time at our knowledge as adsorbents the removal diverse pharmaceuticals (PPs) from samples collected in a rural wastewater facility (town of Josnes in France). The selected facility showed a poor efficiency for the elimination of PPs that were permanently release to the environment. Although involving different interactional mechanisms, the whole adsorbents Na–Mt, nonionic Brij-Mt and cationic BDTA-Mt organoclays, could remove the entire PPs of various chemical nature in a low concentration regime (ng L⁻¹), where electrostatic interactions mainly controlled the adsorption. Thus, the organic PPs cations were preferentially adsorbed onto Na–Mt and Brij_0.4-Mt (with its dual hydrophilic-hydrophobic nature) while anionic PPs showed a bold affinity to BDTA-Mt. The hydrophobic environment generated by the intercalation of surfactants within the interlayer space of organoclays conferred a versatility for the adsorption of numerous PPs through weak molecular forces (Van der Waals and/or pi-pi interactions). The study confirmed the proper efficiency of the studied layered materials including organoclays and emphasized about their promising interests in water remediation strategy.

据我们所知，首次使用Na ⁺交换蒙脱土（Na–Mt）及其由苄基二甲基十四烷基铵（BDTA）阳离子和聚氧乙烯（20）油基醚（Brij-O20）非离子表面活性剂制备的有机粘土衍生物作为吸附剂。从农村污水处理厂（法国乔斯内斯镇）收集的样品中去除多种药物（PPs）。所选设施显示出消除永久释放到环境中的PP的效率低下。尽管涉及不同的相互作用机理，但全部吸附剂Na–Mt，非离子Brij-Mt和阳离子BDTA-Mt有机粘土可以在低浓度（ng L ^-1），其中静电相互作用主要控制吸附。因此，有机PPs阳离子优先吸附在Na-Mt和Brij _0.4 -Mt（具有双重亲水-疏水性质）上，而阴离子PPs对BDTA-Mt具有大胆的亲和力。由表面活性剂嵌入有机粘土的层间空间内产生的疏水环境赋予了通过弱分子力（范德华力和/或pi-pi相互作用）吸附大量PP的多功能性。该研究证实了所研究的包括有机粘土在内的层状材料的适当效率，并强调了它们在水修复策略中的广阔前景。