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Blaquera ALM, Herrera MU, Manalo RD, Maguyon-Detras MC, Futalan CCM, Balela MDL. Oil Adsorption Kinetics of Calcium Stearate-Coated Kapok Fibers. Polymers (Basel) 2023; 15:polym15020452. [PMID: 36679332 PMCID: PMC9864453 DOI: 10.3390/polym15020452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/19/2023] Open
Abstract
This study used a simple and efficient dipping method to prepare oleophilic calcium stearate-coated kapok fibers (CaSt2-KF) with improved hydrophobicity. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) confirmed the deposition of calcium stearate particles on the surface of the kapok fibers. This led to higher surface roughness and improved static water contact angle of 137.4°. The calcium stearate-coated kapok fibers exhibited comparable sorption capacities for kerosene, diesel, and palm oil. However, the highest sorption capacity of 59.69 g/g was observed for motor oil at static conditions. For motor oil in water, the coated fibers exhibited fast initial sorption and a 65% removal efficiency after 30 s. At equilibrium, CaSt2-KF attained a sorption capacity of 33.9 g/g and 92.5% removal efficiency for motor oil in water. The sorption kinetics of pure motor oil and motor oil in water follows the pseudo-second-order kinetic model, and the Elovich model further described chemisorption. Intraparticle diffusion and liquid film diffusion were both present, with the latter being the predominant diffusion mechanism during motor oil sorption.
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Affiliation(s)
- Aimee Lorraine M. Blaquera
- Sustainable Electronic Materials Group, Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman, Quezon City 1101, Metro Manila, Philippines
| | - Marvin U. Herrera
- Institute of Mathematical Sciences and Physics, College of Arts and Sciences, University of the Philippines Los Baños, Los Baños 4031, Laguna, Philippines
| | - Ronniel D. Manalo
- Department of Forest Products and Paper Science, College of Forestry and Natural Resource, University of the Philippines Los Baños, Los Baños 4031, Laguna, Philippines
| | - Monet Concepcion Maguyon-Detras
- Department of Chemical Engineering, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, Los Baños 4031, Laguna, Philippines
| | - Cybelle Concepcion M. Futalan
- Department of Community and Environmental Resource Planning, College of Human Ecology, University of the Philippines Los Baños, Los Baños 4031, Laguna, Philippines
| | - Mary Donnabelle L. Balela
- Sustainable Electronic Materials Group, Department of Mining, Metallurgical, and Materials Engineering, University of the Philippines Diliman, Quezon City 1101, Metro Manila, Philippines
- Correspondence: ; Tel.: +63-02-8981-8500 (ext. 3171)
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Wu D, Hu S, Lu B, Hu Y, Wang M, Yu W, Wang GG, Zhang J. Waste to treasure: Superwetting foam enhanced by bamboo powder for sustainable on-demand oil-water separation. JOURNAL OF HAZARDOUS MATERIALS 2023; 441:129829. [PMID: 36058186 DOI: 10.1016/j.jhazmat.2022.129829] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/04/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Low-cost and sustainable superwetting materials are urgently required for oily wastewater treatment. Many poly(vinylidene fluoride) (PVDF)-based materials have been designed for oil-water separation. However, their fabrication processes frequently require toxic organic solvents and high-cost materials (e.g., carbon tubes and graphene). In this study, a highly porous and superhydrophobic bamboo powders (BP)-enhanced PVDF foam (SBPF) was fabricated via an organic solvent-free process. The SBPF exhibits efficient adsorption and recovery for various oils and organic solvents. Moreover, the SBPF shows high adsorption and separation performance under ultraviolet exposure and turbulent environments. It can also be used for water-in-oil emulsions separation, with a high separation efficiency more than 99.3 % under gravity. Interestingly, the amphiphilic PVDF-BP foam (ABPF) shows underwater superoleophobicity and underoil superhydrophobicity after delignification of SBPF. Owing to the conversion of wettability, it presents a high performance in treatment of both surfactant-stabilied water-in-oil and oil-in-water emulsions with the high separation efficiency achieving more than 99.6 % and 99.5 % respectively under gravity. In addition, the ABPF shows a high separation performance even after ten cycles. Hence, this fabricated organic solvent-free foams are promising candidates for sustainable on-demand separation of oils or organic solvents and water in complex environments.
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Affiliation(s)
- Dong Wu
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shunyou Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Beibei Lu
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Yuanyuan Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Mi Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Wen Yu
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China
| | - Gui-Gen Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, China.
| | - Jiaheng Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Shenzhen 518055, China; Research Centre of Printed Flexible Electronics, Harbin Institute of Technology, Shenzhen 518055, China.
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Controllable construction of multifunctional superhydrophobic coating with ultra-stable efficiency for oily water treatment. J Colloid Interface Sci 2022; 628:356-365. [DOI: 10.1016/j.jcis.2022.07.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/20/2022] [Accepted: 07/23/2022] [Indexed: 11/20/2022]
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