▎ 摘　　要

The nitrate pollution of groundwater and surface water resources is a major environmental problem. The high amounts of nitrate in water can cause the formation of carcinogenic nitrogen-containing organic compounds, such as nitrosamines. In this study, the nitrate removal from the water was studied using ZnO/AgI graphene-based nanophotocatalyst. ZnO/AgI graphene-based nanophotocatalyst was characterized by XRD, BET, EDS, and SEM. The effects of nitrate concentration (60, 100 and 140 ppm), nanophotocatalyst concentration (0.5, 1 and 1.5 g), and pH (4, 6 and 8) were evaluated in visible light and UV light. In the optimal conditions, the highest amount of nitrate removal by ZnO/AgI graphene-based nanophotocatalyst in visible light was found as much as 77% and 97% in UV light. The experiments showed that the nitrate removal of the nanophotocatalyst was increased under the UV light. The result indicates that ZnO/AgI graphene-based nanophotocatalyst can remove nitrate with high percentage; so, it can be the right choice for the degradation of nitrate from water.