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Well-defined 3-Aminopropyltriethoxysilane functionalized magnetite nanoparticles and their adsorption performance for partially hydrolyzed polyacrylamide from aqueous solution
- Source :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects. 586:124288
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The application of magnetite (Fe3O4) nanoparticles (MNPs) as adsorbent materials in solving wastewater treatment problems has attracted increasing attention. In this work, well-defined 3-Aminopropyltriethoxysilane (APTES) functionalized MNPs (APTES-MNPs) were synthesized by two-step method, in which a simple and scalable polyol method was used to initially synthesize MNPs with relatively large sizes and provide a defect site enriched surface to enable the APTES to coat on Fe3O4 uniformly without using SiO2 coating. The structure, morphology and properties of the APTES-MNPs were studied by TEM, XRD, FTIR, XPS and MPMS. The APTES-MNPs showed enhanced adsorption capacity towards HPAM due to the presence of high density of amino groups on the surface. Kinetics study revealed that the adsorption process followed the pseudo-second-order model, whereas the equilibrium isotherm data matched well with the Langmuir model. The APTES-MNPs could be rapidly separated from aqueous solution under magnetic field and be repeatedly used up to three cycles without significant loss of adsorption capacity. This new type of APTES-MNPs is expected to be a promising candidate for HPAM removal from aqueous solution.
- Subjects :
- Materials science
Aqueous solution
Kinetics
Polyacrylamide
Nanoparticle
Langmuir adsorption model
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
symbols.namesake
Colloid and Surface Chemistry
Adsorption
chemistry
Chemical engineering
symbols
Fourier transform infrared spectroscopy
0210 nano-technology
Magnetite
Subjects
Details
- ISSN :
- 09277757
- Volume :
- 586
- Database :
- OpenAIRE
- Journal :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- Accession number :
- edsair.doi...........375ffebb52fb1eb8eda05ffb074cab66