Supramolecular adsorption of cyclodextrin/polyvinyl alcohol film for purification of organic wastewater
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Qingchen Lu
und
Jialu Li
Abstract
Into purified organic wastewater, α-, β-, and γ-cyclodextrin (α-, β-, and γ-CD) were added to polyvinyl alcohol (PVA) with ammonium persulfate as the crosslinker. The CD/PVA composite film with low water solubility and supramolecular adsorption was prepared by solvent evaporation. Fourier transform infrared spectroscopy showed that when CD was successfully added to PVA, the crosslinking process had no effect on -OH, and the structure was stable after soaking in water for 120 h. Solubility experiments showed that the stability of PVA in water was significantly improved. The results of phenolphthalein adsorption showed that the composite film followed the Langmuir isothermal adsorption and the pseudo-second-order kinetics. According to the Langmuir equation, the theoretical maximum adsorption capacities of α-, β- and γ-CD/PVA composite films were 0.41, 2.05, and 2.00 mg/g, respectively. The parameters of the Freundlich equation indicate that the adsorption of the composite film is physical adsorption. The time for α-CD/PVA composite film to reach equilibrium was the shortest, while the longest was for β-CD/PVA composite film. The intraparticle diffusion model showed that the adsorption was mainly affected by the diffusion of the boundary layer, and the diffusion rate limitation of the boundary layer of the high-concentration phenolphthalein solution was more obvious.
Conflict of interest statement: The authors declare that they have no conflict of interests.
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Artikel in diesem Heft
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- Stereocomplex electrospun fibers from high molecular weight of poly(L-lactic acid) and poly(D-lactic acid)
- Dual-wavelength fluorescent anti-counterfeiting fibers with skin-core structure
- Graphene oxide and zinc oxide decorated chitosan nanocomposite biofilms for packaging applications
- Supramolecular adsorption of cyclodextrin/polyvinyl alcohol film for purification of organic wastewater
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- Effects of high-efficiency infrared heating on fiber compatibility and weldline tensile properties of injection-molded long-glass-fiber-reinforced polyamide-66 composites
- Toward the development of polyethylene photocatalytic degradation
Artikel in diesem Heft
- Frontmatter
- Material properties
- Synthesis, characterization and low energy photon attenuation studies of bone tissue substitutes
- The effect of oxygen plasma pretreatment on the properties of mussel-inspired polydopamine-decorated polyurethane nanofibers
- Effects of selected bleaching agents on the functional and structural properties of orange albedo starch-based bioplastics
- Study on the thermal and structural properties of gamma-irradiated polyethylene terephthalate fibers
- Preparation and assembly
- Stereocomplex electrospun fibers from high molecular weight of poly(L-lactic acid) and poly(D-lactic acid)
- Dual-wavelength fluorescent anti-counterfeiting fibers with skin-core structure
- Graphene oxide and zinc oxide decorated chitosan nanocomposite biofilms for packaging applications
- Supramolecular adsorption of cyclodextrin/polyvinyl alcohol film for purification of organic wastewater
- Engineering and processing
- Effects of high-efficiency infrared heating on fiber compatibility and weldline tensile properties of injection-molded long-glass-fiber-reinforced polyamide-66 composites
- Toward the development of polyethylene photocatalytic degradation
