Electrokinetic remediation (EKR) combined permeable reactive barrier (PRB) is an emerging technique for the in-situ hexavalent chromium (Cr(VI)) heavy metal contaminated soil remediation. In the EKR-PRB technique, PRB materials with high Cr(VI) adsorption capacity and regenerability are severe desired. Here, a promising PRB material of aminated electrospun nanofiber membrane (ENFM) was synthesized by a facile short time thermal treatment of an hyperbranched polyethylenimine (HPEI)-enriched polyacrylonitrile (PAN) ENFM. The as-prepared PAN/HPEI ENFM exhibited a remarkable Cr(VI) adsorption capacity (~206 mg g⁻¹) and excellent reusability (>9 cycles) owing to its amine group-rich membrane surface and interpenetrating porous structure. More importantly, a bench-scale Cr(VI) contaminated soil remediation test using a EKR-PRB technique showed that this PAN/HPEI ENFM could effectively immobilize and remove the Cr(VI) in soil.

电动修复（EKR）组合的渗透反应性屏障（PRB）是一种用于原位六价铬（Cr（VI））重金属污染土壤修复的新兴技术。在EKR-PRB技术中，非常需要具有高Cr（VI）吸附能力和可再生性的PRB材料。在这里，通过富集高支化聚乙烯亚胺（HPEI）的聚丙烯腈（PAN）ENFM的快速短时热处理，合成了一种有前景的胺化电纺纳米纤维膜（ENFM）PRB材料。制备的PAN / HPEI ENFM表现出显着的Cr（VI）吸附能力（〜206 mg g ^-1）和富含胺基的膜表面和互穿的多孔结构，具有极好的可重复使用性（> 9个循环）。更重要的是，使用EKR-PRB技术进行的实验室规模的Cr（VI）污染土壤修复试验表明，这种PAN / HPEI ENFM可以有效地固定和去除土壤中的Cr（VI）。