of oil spilled into the East China. [1] This accident imposed devastating impacts on the environment. In this regard, the cleanup strategies of oil spill should be implemented to significantly reduce the environmental damages. Conventional strategies including skimming, [2] bioremediation, [3] in situ burning, [4] and adsorption [5] have been widely used for oil-water separation. Among these approaches, adsorption is considered the most effective method with simplicity and low cost for oil pollutions removal. [6] Several adsorbent materials such as carbon aerogels, [7] graphene sponges, [8] and magnetic foams [9] have been used for this purpose due to their large pore volume and strong adsorption capacity. However, complicated preparation processes, high costs, and scalability challenges restrict the practical applications of these adsorbent materials. In this regard, the use of 3D porous materials such as wools and sponges is more effective. [10,11] Rock wool (RW) is an inorganic fiber material with the characteristics of high tensile strength, high chemical resistance, and excellent incombustibility. [12] It has been widely used as thermal insulator in buildings and industrial equipment. RW can be a good candidate for oil/water separation owning to its porous structure, low density, and low cost. However, due to the mixed hydrophilic/ oleophilic properties, the original RW adsorbs both water and oil simultaneously. Thus, it is not suitable for selective adsorption of oil. The modification of original RW could improve its hydrophobicity. Hao et al. [13] recently used polydimethylsiloxane (PDMS)/silica nanoparticle as modifying agent for preparation of superhydrophobic RW. However, PDMS/silica nanoparticle used as modifier is quite expensive which limits its large-scale applications.Graphene materials including graphene and reduced graphene oxide (RGO) are promising candidates as modifier considering their hydrophobicity. [14,15] Carbon lattice of graphene and its derivatives efficiently repels polar molecules and enhances affinity towards oil and organic solvents. [16,17] Graphene materials can increase the roughness of a substrate when used as coating. Presence of small amounts of oxygencontaining functional groups on RGO increases affinity toward polar solvents. [16] Jamsaz and Goharshadi [18] used polyurethaneThe leakage of industrial oil and organic wastewater discharge has caused serious damage to the natural environment and ecology. Therefore, implementation of a low-cost and high-performance adsorbent material is of great significant. This work reports the preparation of superhydrophobic rock wool (RW) for efficient clean-up of oil and organic solvents. The modified RW is prepared by coating a commercial RW with reduced graphene oxide (RGO) nanosheets under hydrothermal treatment. To improve the adhesion between the RGO nanosheets and RW, a film of chloroperene rubber is deposited on the RW surface followed by modification with RGO. The modified RW possesses superhydrophobicity and superoleophilicity wi...