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Biomass-activated carbon-based superhydrophobic sponge with photothermal properties for adsorptive separation of waste oil.
- Source :
-
Journal of Hazardous Materials . Sep2024, Vol. 477, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- The increasing discharge of oily wastewater from life poses a serious threat to the ecological environment and human health. To develop green, efficient, and low-cost materials for oil-water separation, a superhydrophobic photothermal oil-absorbing sponge (CAC-PDA@MF) was prepared by using nanoscale coconut shell activated carbon (CAC) loaded on a melamine sponge in this study. The sponge had excellent superhydrophobicity (WCA of 159.53°) due to the reduction of surface energy by grafting long-chain silanes. The adsorption capacity of the sponge was 69.04 g/g-158.27 g/g for a wide range of oils and organic solvents, and the sponge had excellent mechanical properties for multiple adsorption and recovery of oil. After 50 cycles of oil-water separation, its separation efficiency was maintained at over 98 %. In addition, the material had high acid, alkali, and salt resistance as well as excellent photothermal conversion properties. Its surface temperature rose rapidly to 100 °C and above, at a light intensity of 1.0 kW/m2. The material was capable of adsorbing and recovering high-viscosity oils that were solid or semi-solid at room temperature. Its versatility and commercial value made it a promising candidate for a wide range of applications. [Display omitted] ● CAC-PDA@MF material had photothermal conversion properties. ● CAC-PDA@MF had excellent hydrophobicity with a water contact angle of 159.53° in air. ● CAC-PDA@MF had excellent oil adsorption capacity and outstanding mechanical stability. ● CAC-PDA@MF had a strong oil-water separation capability and could successfully separate emulsions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03043894
- Volume :
- 477
- Database :
- Academic Search Index
- Journal :
- Journal of Hazardous Materials
- Publication Type :
- Academic Journal
- Accession number :
- 178975793
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2024.135222