Abstract
Oil spills and oily industrial wastewater discharge have been the primary reasons behind numerous environmental problems. Herein, polyurethane sponge (PU) was modified by ZnO decorated rGO and polydimethylsiloxane (PDMS) to enhance the effectiveness to treat oily wastewater. The modified composite sponge showed superhydrophobicity (WCA ∼ 152.4˚), and good oil or organic solvent sorption capacity for n-hexane (20.88 ± 2.1 g/g), dimethylformamide (29.5 ± 2.6 g/g), turpentine oil (30.8 ± 1.9 g/g), diesel (32.4 ± 2.4 g/g), acetone (38.73 ± 1.05 g/g), toluene (41.6 ± 0.3 g/g), gasoline (42.2 ± 2.2 g/g), and cooking oil (42.5 ± 1 g/g) and good recyclability. It also showed good chemical stability (pH ∼ 3 to 9) and temperature resistance (50 ℃ to 200 ℃).
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