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Dias GC, Cardoso MF, Sanches AO, Santos MC, Malmonge LF. PVDF/Clay Spheres Obtained through Phase Inversion for Cu Ion Removal. Polymers (Basel) 2023; 15:2643. [PMID: 37376289 DOI: 10.3390/polym15122643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 04/03/2023] [Accepted: 04/17/2023] [Indexed: 06/29/2023] Open
Abstract
In this study, spheres of poly (vinylidene fluoride)/clay were synthesized using an easy dripping method (also known as phase inversion). The spheres were characterized by scanning electron microscopy, X-ray diffraction, and thermal analysis. Finally, application tests were carried out using commercial cachaça, a popular alcoholic beverage in Brazil. The SEM images revealed that during the solvent exchange process for sphere formation, PVDF tends to form a three-layered structure with a low-porosity intermediate layer. However, the inclusion of clay was observed to reduce this layer and also widen the pores in the surface layer. The results of the batch adsorption tests showed that the composite with 30% clay content in relation to the mass of PVDF was the most effective among those tested, with the removal of 32.4% and 46.8% of the total copper present in the aqueous and ethanolic media, respectively. The adsorption of copper from cachaça in columns containing cut spheres resulted in adsorption indexes above 50% for samples with different copper concentrations. Such removal indices fit the samples within the current Brazilian legislation. Adsorption isotherm tests indicate that the data fit better to the BET model.
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Affiliation(s)
- Gabriel C Dias
- School of Natural Sciences and Engineering, São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Mayk F Cardoso
- School of Natural Sciences and Engineering, São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Alex O Sanches
- School of Natural Sciences and Engineering, São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
| | - Mirian C Santos
- Institute of Chemistry Araraquara, São Paulo State University (UNESP), Araraquara 14800-900, SP, Brazil
- Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-900, SP, Brazil
| | - Luiz F Malmonge
- School of Natural Sciences and Engineering, São Paulo State University (UNESP), Ilha Solteira 15385-000, SP, Brazil
- Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, São Paulo State University (UNESP), Araraquara 14800-900, SP, Brazil
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A Literature Review of Modelling and Experimental Studies of Water Treatment by Adsorption Processes on Nanomaterials. MEMBRANES 2022; 12:membranes12040360. [PMID: 35448329 PMCID: PMC9029349 DOI: 10.3390/membranes12040360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023]
Abstract
A significant growth in the future demand for water resources is expected. Hence researchers have focused on finding new technologies to develop water filtration systems by using experimental and simulation methods. These developments were mainly on membrane-based separation technology, and photocatalytic degradation of organic pollutants which play an important role in wastewater treatment by means of adsorption technology. In this work, we provide valuable critical review of the latest experimental and simulation methods on wastewater treatment by adsorption on nanomaterials for the removal of pollutants. First, we review the wastewater treatment processes that were carried out using membranes and nanoparticles. These processes are highlighted and discussed in detail according to the rate of pollutant expulsion, the adsorption capacity, and the effect of adsorption on nanoscale surfaces. Then we review the role of the adsorption process in the photocatalytic degradation of pollutants in wastewater. We summarise the comparison based on decomposition ratios and degradation efficiency of pollutants. Therefore, the present article gives an evidence-based review of the rapid development of experimental and theoretical studies on wastewater treatment by adsorption processes. Lastly, the future direction of adsorption methods on water filtration processes is indicated.
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Wang Y, Li Q, Miao W, Lu P, You C, Wang Z. Hydrophilic PVDF membrane with versatile surface functions fabricated via cellulose molecular coating. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119817] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Zhong H, Li Z, Zhao T, Chen Y. Surface Modification of Nanofibers by Physical Adsorption of Fiber-Homologous Amphiphilic Copolymers and Nanofiber-Reinforced Hydrogels with Excellent Tissue Adhesion. ACS Biomater Sci Eng 2021; 7:4828-4837. [PMID: 34478620 DOI: 10.1021/acsbiomaterials.1c00982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report a simple approach to modify hydrophobic PCL nanofibers by adsorption of a fiber-homologous amphiphilic triblock copolymer (PCL-b-PEG-b-PCL, PCEC). The modified PCL nanofibers were then utilized to reinforce a physical hydrogel, which was formed by micellar crosslinking of the same PCEC triblock copolymer. Therefore, the copolymer played a dual role in not only dispersing and stabilizing nanofibers but also additionally providing a framework for the hydrogel matrix. The mechanical strength of the hydrogel was significantly enhanced by addition of the modified PCL nanofibers, and the gel modulus can be tuned by varying the concentration of the copolymer and nanofibers. The effect of nanofiber size and content on the mechanical properties of the hydrogel matrices was studied. Different from hydrogel composites that were reinforced by 2D fiber meshes or 3D woven fiber networks, this free fiber-reinforced hydrogel can be readily injected to adapt to the environmental shape and self-heal. The hydrogel composites showed superior tissue adhesion properties compared to the commercially available fibrin glue, especially in muscle adhesion. Due to its injectable and self-healing properties, this nanofiber-reinforced hydrogel may have great potential as a new type of tissue sealant.
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Affiliation(s)
- Hai Zhong
- School of Materials Science and Engineering, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510275, China
| | - Zhiyong Li
- Nepgel Chemical Co., Ltd., No. 127, China South-City Industrial Zone, Longgang District, Shenzhen 518111, China
| | - Tianyu Zhao
- School of Materials Science and Engineering, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510275, China
| | - Yongming Chen
- School of Materials Science and Engineering, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, Sun Yat-sen University, Guangzhou 510275, China
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Xia L, Vemuri B, Gadhamshetty V, Kilduff J. Poly (ether sulfone) membrane surface modification using norepinephrine to mitigate fouling. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Cui Z, Li W, Zeng H, Tang X, Zhang J, Qin S, Han N, Li J. Fabricating PVDF hollow fiber microfiltration membrane with a tenon-connection structure via the thermally induced phase separation process to enhance strength and permeability. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ojajuni O, Holder S, Cavalli G, Lee J, Saroj DP. Rejection of Caffeine and Carbamazepine by Surface-Coated PVDF Hollow-Fiber Membrane System. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.5b04055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oluwatosin Ojajuni
- Department of Civil and Environmental Engineering, ‡Department of Chemistry, and §Department of
Chemical and Process Engineering, Faculty of Engineering
and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom
| | - Shima Holder
- Department of Civil and Environmental Engineering, ‡Department of Chemistry, and §Department of
Chemical and Process Engineering, Faculty of Engineering
and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom
| | - Gabriel Cavalli
- Department of Civil and Environmental Engineering, ‡Department of Chemistry, and §Department of
Chemical and Process Engineering, Faculty of Engineering
and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom
| | - Judy Lee
- Department of Civil and Environmental Engineering, ‡Department of Chemistry, and §Department of
Chemical and Process Engineering, Faculty of Engineering
and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom
| | - Devendra P. Saroj
- Department of Civil and Environmental Engineering, ‡Department of Chemistry, and §Department of
Chemical and Process Engineering, Faculty of Engineering
and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom
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Chen GE, Sun L, Xu ZL, Yang H, Huang HH, Liu YJ. Surface modification of poly(vinylidene fluoride) membrane with hydrophilic and anti-fouling performance via a two-step polymerization. KOREAN J CHEM ENG 2015. [DOI: 10.1007/s11814-015-0105-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hu MX, Li JN, Zhang SL, Li L, Xu ZK. Hydrophilic modification of PVDF microfiltration membranes by adsorption of facial amphiphile cholic acid. Colloids Surf B Biointerfaces 2014; 123:809-13. [DOI: 10.1016/j.colsurfb.2014.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 10/09/2014] [Accepted: 10/11/2014] [Indexed: 12/24/2022]
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