Metal organic frameworks (MOFs) is a new brilliant class of crystalline materials that has increasingly drawn a vast consideration owing to its versatile applications 18, 19. Among the mentioned techniques adsorption has been considered as the most favorable technique for the removal of TCs from wastewater owing to it is simple, economic, low-energy consumption, etc. Thence, numerous developing techniques have been used for TCs removal from wastewater including adsorption 8, 9, ultrasonic irradiation 10, photocatalytic degradation 11, 12, 13, membrane process 14, and fenton oxidation 15. However, humans could not completely metabolize TCs and around 50–80% of the applied dosage is secreted via urine 7. In this regard, antibiotics such as tetracyclines (TCs) have been recommended in new research that they may be able to treat COVID-19 infection through their anti-inflammatory and anti-apoptotic activities 4, 5, 6. Thence, it is inevitable to find out effective strategies for removing these noxious pharmaceutical residues from water 3. However, the tons of pharmaceutical residues especially antibiotics that is being disposing daily into water bodies may be the seed to an even more ferocious pandemic. During the turbulent period of COVID-19, the medical staff is exerting great efforts to preserve humanity.
Presently, the scarcity of drinking water is the major problem that is sweeping the world, menacing humanity with annihilation 1, 2. Besides, reusability test signified that composite microbeads retained superb adsorption properties for six consecutive cycles, emphasizing its potentiality for removing of pharmaceutical residues. Furthermore, thermodynamic study clarified that the TC adsorption process was endothermic, random and spontaneous. In addition, the adsorption process followed the pseudo-second-order and well-fitted to Freundlich and Langmuir models with a maximum adsorption capacity of 294.12 mg/g at 25 ◦C and pH 6. The results revealed that the adsorption of TC augmented with rising CNT proportion up to 15 wt% in the microbeads matrix. It was found that the specific surface area of microbeads was 273.77 m 2/g. Various tools including FTIR, XRD, SEM, BET, Zeta potential and XPS were applied to characterize the composite microbeads.
MIL-125(Ti)/MIL-53(Fe) binary metal organic framework (MOF) was synthetized and incorporated with carbon nanotube (CNT) into alginate (Alg) microbeads to form composite microbeads.
In this investigation, we aimed to fabricate easy separable composite microbeads for efficient adsorption of tetracycline (TC) drug.
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