聚离子液体水凝胶用于中性水中Cr(VI)的去除

随着经济的快速发展，水污染已成为全球关注的紧迫问题。其中，Cr（VI）在废水中含量较高且毒性较强，可引起多种严重疾病。而大多数污染地表水和地下水的pH往往是接近中性的。因此，开发具有近中性pH值下有效去除Cr（VI）的吸附剂对生态系统和公众健康至关重要。本文设计并制备了具有不同结构的三氮唑鎓聚离子液体水凝胶，并将其应用于CrO42-的吸附和释放。该水凝胶可在中性条件下实现水中CrO42-的100%去除，最大吸附量高达356 mg/g。等温吸附结果表明，在较低浓度下CrO42-在聚离子液体水凝胶中为单层吸附。此外，可进一步通过离子交换将吸附于水凝胶中的CrO42-释放出来，实现吸附剂的再生。

Poly(ionicliquid)HydrogelforCr(VI)RemovalfromNeutralWater

With the development of economy, water pollution has become a pressing issue of global concern. Among them, Cr (VI) is highly soluble and toxic in wastewater, which can cause serious diseases. The pH of most contaminated surface water and groundwater is generally near neutral. Therefore, the development of adsorbents with effective removal of Cr (VI) at near-neutral pH is crucial to the ecosystem and public health. In this paper, triazolium poly(ionic liquid) hydrogels with different structures were designed and prepared and applied to the adsorption and release of CrO42-. The hydrogels could achieve 100% removal of CrO42- from water under neutral conditions with a maximum adsorption capacity of 356 mg/g. Isothermal adsorption results show that CrO42- is adsorbed as a monolayer in the hydrogels at lower concentrations. In addition, the CrO42- adsorbed in the hydrogels could be further released by ion exchange to achieve regeneration of the adsorbent.