Water, being the crucial feature of our planet, the contamination of which is a grave matter of concern globally. Elimination of tenacious pollutants from the aquatic phase is indispensable for the sustainability of this planet. Adsorptive sequestration of pollutants is a highly cherished way owing to its design simplicity, economic feasibility and, higher efficacy than various reported treatment methods. Amidst the ample range of adsorbents employed for an environmental cause, clay-hydrogel nanocomposites (CHN) are emerging as an enticing materials platform for wastewater treatment owing to their high sorption capacity, affinity, environmental viability, tailorable physiochemical characteristics, and better reusability. The presence of various functional groups in the polymer chain –OH, –COOH, –NH₂ along with the adsorptive potential of clays validate them as a hot spot sorbent. This review initially summarizes the synthetic methodologies of various clay-hydrogel nanocomposites and then their utilization in the seizure of pollutants from the aquatic realm. The removal mechanism which governs the uptake of pollutant on the clay-hydrogel nanocomposites has been thoroughly reviewed which illustrated that electrostatic interaction, hydrogen bonding, and complexation are the prime ways to sequester dyes and metals on CHN. Discussion on isotherm and kinetic models along with thermodynamic study is also provided. Regeneration efficiency of CHN was also discussed demonstrating HCl to be potent desorbing agent than various acids and organic solvents. Finally, the future perspective for the advancement of CHN in the direction of modern technological facets is also detailed out.

水是地球的关键特征，水的污染已成为全球关注的严重问题。消除水相中的顽固污染物对于地球的可持续发展是必不可少的。由于其设计简单，经济可行性以及比各种报道的处理方法更高的功效，因此污染物的吸附螯合是一种非常珍贵的方法。在出于环境原因而使用的多种吸附剂中，粘土-水凝胶纳米复合材料（CHN）由于具有高吸附能力，亲和力，环境可行性，可定制的理化特性和更好的可重复使用性，成为诱使废水处理的材料平台。聚合物链中存在各种官能团–OH，–COOH，–NH ₂加上粘土的吸附潜力，使它们成为热点吸附剂。这篇综述首先概述了各种粘土-水凝胶纳米复合材料的合成方法，然后将其用于从水生环境中缉获污染物。彻底审查了控制粘土-水凝胶纳米复合材料上污染物吸收的去除机理，这表明静电相互作用，氢键和络合是将染料和金属螯合在CHN上的主要方法。还提供了关于等温线和动力学模型的讨论以及热力学研究。还讨论了CHN的再生效率，证明HCl是比各种酸和有机溶剂更有效的脱附剂。最后，