▎ 摘　　要

In the paper, ZnO-deposited activated carbon composite (ZnO-AC) was firstly prepared in a simple two-step preparation process, and then covered with nano-graphene oxide to give the NGO-ZnO-AC composite. The successful deposition of ZnO and NGO on the AC surface was demonstrated by various experiments, and the ZnO nanoparticles showed a mean diameter size mainly within about 10 nm. The specific surface area of the NGO-AC and NGO-ZnO-AC decreased from 67.74 m(2)/g of the parent AC to 32.54 and 11.43 m(2)/g, respectively. The fabricated NGO-ZnO-AC showed excellent adsorptive behaviors towards CrO42- and Cu2+ ions, outperforming both ZnO-AC and AC.