▎ 摘　　要

In this paper, the adsorption composite materials based on the incorporation of diatomite (DE) and graphene oxide (GO) were developed and characterized by different techniques (UV vis, Raman, SEM and XRD), The adsorption behaviors for methylene blue (MB) as received GO -DE composite materials adsorbents have been investigated. The results indicate that GO -DE composite materials can significantly hoist the adsorption capacity of DE and improve the separation trouble of GO with outstanding adsorption ability. It is concluded that the GO -DE composite material retain the porous structure of DE, and GO nanosheets bind physically to the surface of DE. The adsorption experiments show that the kinetic data fit well with pseudo -second -order model. The adsorption isotherms follow the Freundlich isotherm model. The adsorption behavior of the GO -DE composites is an exothermic and spontaneous process. The GO -DE composite materials can be a promising candidate as an adsorbent for the removal of cationic dyes from wastewater.