A Mild Method for Preparation of Highly Selective Magnetic Biochar Microspheres
| Autor: | Rongqi Chen, Junping Wang, Tao Zhao |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
magnetic Scanning electron microscope 02 engineering and technology 010501 environmental sciences Ferric Compounds 01 natural sciences Article Catalysis Nanocomposites Water Purification lcsh:Chemistry Inorganic Chemistry Adsorption Biochar biochar Solid phase extraction Physical and Theoretical Chemistry Magnetite Nanoparticles lcsh:QH301-705.5 Molecular Biology Spectroscopy 0105 earth and related environmental sciences Organic Chemistry Extraction (chemistry) General Medicine Tetracycline 021001 nanoscience & nanotechnology Microspheres Pickering emulsion Computer Science Applications Thermogravimetry lcsh:Biology (General) lcsh:QD1-999 Absorption Physicochemical Charcoal Emulsion molecularly imprinting technology 0210 nano-technology Nuclear chemistry |
| Zdroj: | International Journal of Molecular Sciences Volume 21 Issue 11 International Journal of Molecular Sciences, Vol 21, Iss 3752, p 3752 (2020) |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms21113752 |
| Popis: | We report the use of biochar and Fe3O4 nanoparticles as co-stabilizers for oil-in-water (o/w) Pickering emulsion. The emulsion is subsequently used to prepare magnetic tetracycline-imprinted biochar composite microspheres (MMIPMs) with good uniformity and high selectivity. The MMIPMs were characterized by scanning electron microscopy (SEM), Brunner-Emmet-Teller (BET) measurements, Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and thermogravimetry analysis (TGA). The adsorption properties of tetracycline to the MMIPMs were investigated using different adsorption experiments including adsorption kinetic experiment, equilibrium binding experiment, selectivity evaluation and competitive adsorption tests. The theoretical maximum adsorption capacity of the MMIPMs (15.45 mg g&minus 1) was greater than that of the raw biochar (2.10 mg g&minus 1) and non-imprinted biochar composite microspheres (3.39 mg g&minus 1) for tetracycline. Further, the MMIPMs were used as adsorbent for magnetic solid phase extraction (SPE) for the extraction of tetracycline present in drinking water, milk, fish and chicken samples. Under optimal conditions, the results showed good recovery yield ranging from 88.41% to 106.29% with a relative standard deviation (RSD) ranging from 0.35% to 6.83%, respectively. |
| Databáze: | OpenAIRE |
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