▎ 摘　　要

Water pollution from oil and organic Pollutants has been a serious environmental problem. Due to its simplicity and high efficiency, absorption method is preferred for oil recovery. Ultralight and reusable graphene aerogels are popular as useful absorbents. Cellulose fiber can enhance the absorption capacity and mechanical stability of graphene aerogels and it overcomes the defect of volume shrinkage of the graphene aerogel during freeze-drying. This paper outlined the synthesis, and characterization of the graphene aerogel supporting cellulose fibers to remove organic pollutants. Aerogels were prepared using three different types of cellulose fibers in order to discover and compare the differences. The absorption capacity of the aerogels was investigated using ASTM F726-17. The morphology of the aerogels was observed by FE-SEM analysis. To perform a detailed investigation on the structure of cellulose/graphene aerogel composite, the Fourier Transform Infrared (FT-IR) spectrum and X-Ray diffraction (XRD) was acquired. The synthesized aerogels showed an excellent absorption capacity (up to 50 times their weight), for all of the selected oils and organic solvents. All the synthesized aerogels could be reused, and the absorbed pollutant could be recovered by mechanical squeezing method or thermal desorption. The aerogels could still maintain a high absorption capacity (about 84 %), after being compressed and released for 10 cycles. Also, the aerogels can be regenerated by repeated heat treatment; which decreases their absorption capacity to 91 % after 5 cycles. This study presents a graphene-based absorbent with considerable absorption capacity (45-71 times its weight), and reusability for different oils and organic solvents.