Effective separation of petroleum oil-water mixtures via flexible and re-usable hydrophobic soot-coated melamine sponge
Nazhipkyzy M. Assylkhanova D. Araylim N. Seitkazinova A. Özsin G. Varol E.A.
October 2022Elsevier Ltd
Journal of Water Process Engineering
2022#49
Superhydrophobic materials like carbon-coated sponges have been attracting attention due to their wide applicability in several industries. One of the main applications of such materials is the efficient removal of various water pollutants such as oil by adsorption. Herein, a flexible, porous, and hydrophilic melamine sponge was coated by superhydrophobic soot that was produced by incomplete combustion of the propane-butane mixture. Characterization of the soot and the sponge was performed via several methods such as spectroscopy, microscopy, and thermogravimetry. The product was tested in the petroleum oil removal process. The superhydrophobic sponge repelled water well and at the same time perfectly sorbed oil products. The wetting edge angle of soot coated sponge was found between 145 and 150°. The sponge showed an excellent adsorption capacity of 24 g oil/g for the selective separation of oil from water. The entrapped oil was released simply by squeezing the sponge for cyclic use and about 95.5 wt% of the oil was adsorbed and the soot-coated sponge still maintained this capacity after 19 cycles. Hence, this novel soot-coated hydrophobic sponge is considered a promising candidate for oil-polluted water treatment.
Adsorption , Hydrophobic sponge , Hydrophobicity , Oil-water separation , Soot
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Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology, Almaty, 050000, Kazakhstan
Institute of Combustion Problems, Laboratory of Synthesis Carbon Nanomaterials in Flame, Almaty, 050000, Kazakhstan
Bilecik Şeyh Edebali University, Faculty of Engineering, Dept. of Chemical Engineering, Bilecik, Turkey
Imperial College London, Faculty of Engineering, Dept. of Chemical Engineering, London, SW7 2BU, United Kingdom
Eskişehir Technical University, Faculty of Engineering, Department of Chemical Engineering, Eskişehir, 26555, Turkey
Al-Farabi Kazakh National University
Institute of Combustion Problems
Bilecik Şeyh Edebali University
Imperial College London
Eskişehir Technical University
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