Abstract
Sand, an abundant resource from the nature, is a promising candidate for oil/water separation. Herein, raw sand was designed with switchable surface wettability to enable recyclability and versatility in practical oil/water separation. The “smart” sand was fabricated by grafting pH-responsive poly(4-vinylpyridine) (P4VP) and oleophilic/hydrophobic octadecyltrimethoxysilane (OTS) onto its surface. The decorated sand can be used as the oil sorbent for controllable oil sorption and desorption in response to different pHs, as well as a filter to selectively separate either oil or water on demand. This novel design offers an intelligent, low-cost, large-scale, and highly efficient route to potentially settle the issues of industrial oily wastewater and oil spill.
Original language | English (US) |
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Journal | Industrial & Engineering Chemistry Research |
DOIs | |
State | Published - Jun 23 2021 |
Bibliographical note
KAUST Repository Item: Exported on 2021-06-25Acknowledgements: We would like to thank the King Abdullah University of Science and Technology (KAUST) and Saudi Aramco for generous funding to support this project (RGC/3/3577-01-01).
ASJC Scopus subject areas
- General Chemical Engineering
- General Chemistry
- Industrial and Manufacturing Engineering