Exploring the Potential of Ionic Porous Organic Polymers for Selective Sorption of Oxoanions from Aqueous Medium

The increasing contamination of water resources with toxic pollutants has become a serious environmental and public health concern, contributing to the global drinking water crisis. This review article highlights literature from the past decade regarding ionic porous organic polymers (iPOPs) used to remove toxic oxoanionic pollutants, reflecting the growing concern over the years. Common oxoanionic pollutants, such as CrO 4 2− , AsO 4 3− , SeO 4 2 − , and radioactive 99 TcO 4 − /ReO 4 − , are frequently found in both natural and industrial effluents, and their persistence poses a significant risk due to their high toxicity and mobility. Conventional treatment methods often lack selectivity, exhibit low efficacy, or have poor reusability, emphasizing the urgent need for advanced sorbent materials. In this context, iPOPs have garnered considerable attention as advanced functional materials for remediating toxic oxoanionic pollutants from aqueous environments. Their intrinsic design, which incorporates permanent ionic sites within porous organic frameworks, facilitates strong electrostatic interactions, ion exchange processes, hydrogen bonding, and tailored host–guest interactions, thereby enabling the selective capture of hazardous oxoanions. Moreover, the extensively conjugated polymeric backbone of iPOPs, derived from their organic building blocks, allows for fluorescence‐based detection of oxoanionic pollutants. Additionally, their chemical robustness, recyclability, and design flexibility highlight their potential as a sustainable solution for ensuring safe drinking water quality, addressing the challenges of global water purification.