Adsorption of tetracycline by Nicandra physaloides (L.) Gaertn seed gum and Nicandra physaloides(L.) Gaertn seed gum/Carboxymethyl chitosan aerogel
| Autor: | Huimin Wang, Yanhui Li, Wenshuo Xu, Liubo Li, Yong Sun, Meixiu Li, Mingfeii Cui |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Morphology (linguistics) Chemistry Scanning electron microscope 0208 environmental biotechnology Langmuir adsorption model Aerogel 02 engineering and technology General Medicine 010501 environmental sciences 01 natural sciences Endothermic process 020801 environmental engineering symbols.namesake Adsorption symbols Environmental Chemistry Fourier transform infrared spectroscopy Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Nuclear chemistry |
| Zdroj: | Environmental Technology. 43:4237-4248 |
| ISSN: | 1479-487X 0959-3330 |
| DOI: | 10.1080/09593330.2021.1946166 |
| Popis: | In this study, novel aerogels of Nicandra physaloides (L.) Gaertn seed gum (NPG) and Nicandra physaloides (L.) Gaertn seed gum/Carboxymethyl chitosan (NPG/CMC) were prepared by freeze-drying method for removing tetracycline (TC) from water. Scanning electron microscope (SEM), X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) were used to characterize structure and morphology of NPG and NPG/CMC aerogels. The average pore diameter of NPG and NPG/CMC were 3.04 and 1.2 nm, the specific surface areas were 2.67 and 0.73 m2/g, respectively. The maximum adsorption capacity of NPG and NPG/CMC aerogels for TC based on Langmuir isotherm was 266.7 and 332.23 mg/g respectively. Through thermodynamic and kinetic studies, it was found that the adsorption processes of the two adsorbents were spontaneous and followed the pseudo-second-order kinetic model. And the process of NPG adsorption of TC was endothermic, while NPG/CMC was exothermic. |
| Databáze: | OpenAIRE |
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