PA6 nanofibrous membrane was first fabricated by electrospinning technique and then PA6@LDH composite nanofibrous membrane was synthesized by hydrothermal method of a mix of LDH precursor and PA6 nanofibrous membrane.Scanning electron microscopy (SEM)

Fourier transform infrared spectroscopy (FTIR)

Energy dispersive detector (EDX)

X-ray diffraction (XRD) were used to confirm the formation of LDH on the PA6 nanofibers.The result of SEM revealed that PA6@LDH nanofibrous membrane had a better morphology and a lot of nanoparticles successfully adhered to the surface of PA6 nanofibrous membrane.FTIR

EDX and XRD proved that the nanoparticles were LDH.Cr(Ⅵ)-removal experiments were carried out to study the influence of Mg/Al molar ratio and pH value.The results indicated that the best Mg/Al molar ratio was 3

the highest Cr(Ⅵ) adsorption occurred at pH value of 2 and the adsorption capacity could be as high as 242 mg per gram of membrane

which was much higher than the most reported research results.Moreover

the adsorption experiment also showed that the adsorption process belonged to Langmuir adsorption model and the kinetics of the adsorption followed the pseudo-second-order model.Meanwhile

the freestanding membrane could be easily separated from liquid solutions and showed excellent cyclic utilization performance.Therefore

the PA6@LDH nanofibrous membrane could be a good candidate for the development of new environmental remediation nanomaterials.