Journal
COATINGS
Volume 12, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/coatings12091298
Keywords
metal-organic framework; adsorption; tetracycline; carbon nanotubes; copper alginate
Categories
Funding
- National Natural Science Foundation of China [51672140]
- Taishan Scholar Project of Shandong Province [201511029]
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By studying the adsorption performance of alginate composite aerogel beads on tetracycline, it was found that the aerogel beads containing carbon nanomaterials showed excellent adsorption capacity with a removal rate of 94%.
In order to remove tetracycline (TC) from sewage more effectively, the adsorption performance of TC on alginate composite aerogel beads containing carbon nanomaterials was studied systematically. Carboxylated functionalized carbon nanotubes (F-CNTs)@Cu-based metal-organic framework (Cu-BTC) carbon nanomaterial composites (F-C) were prepared by a hydrothermal method, and the F-C powders were coated and fixed by macromolecular polymer copper alginate (CA). Then, F-CNTs@Cu-BTC@CA composite aerogel beads (F-C-CA) were prepared by a vacuum freeze-drying method. The new composite was characterized by BET, SEM, FTIR, and TGA, and its physical and chemical properties were analyzed. The results of batch adsorption experiments showed that F-C-CA aerogel beads had excellent adsorption capacity for TC. At 303 K, 10 mg F-C-CA aerogel beads adsorbed 20 mL 100 mg center dot L-1 TC solution; the removal rate reached 94% after 48 h. After kinetic analysis, the adsorption process of F-C-CA on TC was found to be more coherent with the pseudo-second-order kinetic model (chemisorption process). The isotherm fitting analysis indicated that the adsorption behavior was more suitable to the Langmuir model (monolayer adsorption), and the fitted maximum adsorption was 297 mg center dot g(-1).
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