This work reports the preparation of a surface ion-imprinted polymer (IIP) using polypropylene (PP) fibers as substrates for the selective adsorption of Cr(VI). Glycidyl methacrylate was firstly grafted onto PP fibers through a plasma polymerization-induced process, followed by the construction of imprinted sites. The resultant sorbent was characterized using SEM, FT-IR, TGA, XPS, and water contact angle. The results of batch adsorption experiments showed that the maximum Cr(VI) adsorption capacity was 103 mg/g at pH 3 and 25 °C. The Cr(VI) adsorption process followed a pseudo-second-order rate model, and the equilibrium data were best described by a Langmuir isotherm model. Meanwhile, the adsorption process was spontaneous and endothermic. IIP showed a high adsorption selectivity for Cr(VI) in binary systems with Cr³⁺, Cu²⁺, and SO₄²⁻, respectively, compared with that of non-imprinted fibers. The removal mechanism of Cr(VI) was investigated combining with FT-IR and XPS analysis, and the results suggested that chemical adsorption occurred between the functional groups on IIP and Cr(VI), as did the partial transformation of Cr(VI) to Cr³⁺. The results demonstrated that the prepared material is a good candidate for selective Cr(VI) adsorption in practical use.

这项工作报告了使用聚丙烯（PP）纤维作为基质选择性吸附Cr（VI）的表面离子印迹聚合物（IIP）的制备。首先通过等离子聚合诱导的方法将甲基丙烯酸缩水甘油酯接枝到PP纤维上，然后构建压印位点。使用SEM，FT-IR，TGA，XPS和水接触角对所得的吸附剂进行表征。分批吸附实验的结果表明，在pH 3和25°C下，最大的Cr（VI）吸附容量为103 mg / g。Cr（VI）吸附过程遵循伪二级速率模型，平衡数据最好用Langmuir等温线模型描述。同时，吸附过程是自发的且吸热的。IIP在具有Cr ^3+的二元体系中显示出对Cr（VI）的高吸附选择性，Cu ²⁺和SO ₄ ^2-与非压印纤维相比。结合FT-IR和XPS分析研究了Cr（VI）的去除机理，结果表明，IIP和Cr（VI）上的官能团之间发生了化学吸附，Cr（VI）部分转化为Cr Cr ³⁺。结果表明，所制备的材料是实际应用中选择性Cr（VI）吸附的良好候选者。