Abstract Pillared clays are special kinds of modified clays with significant and permanent porosity, produced by embedding columns or pillars between the layers of clay. However, these materials are very well-known for their catalytic properties; their adsorptive characteristics in wastewaters towards different classic and growing contaminants need to be studied comprehensively. The present work is performed to introduce different methods for clays' pillaring, the main steps of the process, comparison of various pillaring agents, etc. During recent years, several investigations have been carried out to find a way for pillared clays' modification (by introducing active chemical functional groups, doping, heat treatment, etc.) to achieve selective adsorbents towards specific pollutants. Therefore, the main modification techniques including surfactant modification, metal doping, etc. are introduced and classified in the present work. Furthermore, adsorptive applications of (modified) pillared clays towards organic, pharmaceutical, and metal ions pollutants, the relationship between physicochemical properties and adsorption performance of pillared clays, adsorption mechanisms, and quantitative comparison of pillared clays' ability for pollutants removal are the other issues that have been considered in the present work.

中文翻译：

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改性柱撑粘土在废水处理过程中作为吸附剂的综合研究

摘要 柱状粘土是一种特殊的改性粘土，具​​有显着的永久孔隙率，是通过在粘土层之间嵌入柱状或柱状体而产生的。然而，这些材料因其催化性能而广为人知。需要全面研究它们在废水中对不同经典和生长污染物的吸附特性。目前的工作是介绍粘土柱撑的不同方法，该过程的主要步骤，各种柱撑剂的比较等。 近年来，已经进行了多项研究以寻找柱撑粘土改性的方法（通过引入活性化学官能团、掺杂、热处理等）以实现对特定污染物的选择性吸附。所以，本工作对主要的改性技术包括表面活性剂改性、金属掺杂等进行了介绍和分类。此外，（改性）柱状粘土对有机、药物和金属离子污染物的吸附应用、柱状粘土理化性质与吸附性能的关系、吸附机制以及柱状粘土去除污染物能力的定量比较是其他问题。在目前的工作中已经考虑过。