The walnut shell-supported-nano zero valent iron (walnut-nZVIFe) was prepared by NaBH4, FeCl2.4H2O and walnut shell using liquid phase chemical reduction. The materials were characterized by FT-IR, XRD and TEM. The walnut-nZVIFe to Pb2 was investigated. The results had indicated that the maximum adsorption capacity for Pb2 was 199.90 mg g-1 at 293K, pH 5.0 and the amount of the adsorbent was 10 mg when the initial concentration of Pb2 was 200 mg.L-1. The adsorption kinetics data indicated that the adsorption fitted well with the pseudo-second-order kinetic model. The adsorption isotherms of Pb2 could be well described by the Langmuir equation．