Evaluating the performance of L-methionine modified montmorillonite K10 and 3-aminopropyltriethoxysilane functionalized magnesium phyllosilicate organoclays for adsorptive removal of azithromycin from water

Imanipoor, Javad; Mohammadi, Mohsen; Dinari, Mohammad

doi:10.1016/j.seppur.2021.119256

Cited by 26 publications

(13 citation statements)

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“…After AC incorporation, bands of −NH 2 (1607 cm −1 ), Si−C (1144 cm −1 ), and Mg−O−Si (850 cm −1 ) appeared for the MIL-53(Al)@AC nanocomposite. 26 Thus, the FT-IR analysis confirmed the nanocomposite as well as MIL-53(Al) formation and the successful synthesis of samples. To further explore the prosperous synthesis of the MIL-53(Al)@AC nanocomposite, we implemented an XPS study.…”

Section: ■ Results and Discussionsupporting

confidence: 52%

“…14,35 The AC exhibits a 2D sheetlike structure (Figure 3b), which was similar to the reports in the literature. 26,36 The FESEM image of the MIL-53(Al)@AC nanocomposite (Figure 3c) varies from the pristine MIL-53(Al) such that clay junctions are observed, among some particles of MOF. For further investigation of the clay junction nature, EDS analysis was performed for nanocomposite.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…We also found similar results in previous works. 14,26 Effect of Temperature. Temperature is a fundamental criterion in the adsorption process.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In our previous research, we obtained similar results using organoclay sorbents. 26 Effect of Impurity. Natural waters and effluents can contain a variety of organic and inorganic impurities, including salts, colloids, and surfactants.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…This type of material has some unique specifications, such as a very orderly structure, large surface area, and high pore volume . Regarding the specific properties, their application as alternative porous materials has risen in different fields like gas storage and separation, drug delivery, and adsorption. , Among the countless MOFs that have been utilized so far, MIL-53(Al) is one of the robust sorbents, which is highly regarded by researchers because of its unique traits such as structural flexibility and low cost . However, poor chemical and thermal stability, as well as sensitivity to moisture, have been identified as disadvantages of MOFs utilization and limited their application.…”

Section: Introductionmentioning

confidence: 99%

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Porous Aluminum-Based Metal–Organic Framework–Aminoclay Nanocomposite: Sustainable Synthesis and Ultrahigh Sorption of Cephalosporin Antibiotics

Imanipoor

Mohammadi

2022

Langmuir

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A novel sorbent was synthesized based on MIL-53(Al) MOF grown over an aminoclay (AC) platform, called MIL-53(Al)@AC nanocomposite, via a green and facile hydrothermal method. The nanocomposite was characterized using FT-IR, PXRD, BET, TEM, FESEM, EDS, XPS, TGA, DLS, and zeta potential analyses. BET analysis represented the porous nature and great surface area of MIL-53(Al)@AC. The high crystalline structure for the synthesized nanocomposite was verified using the PXRD pattern. FESEM, EDS, TEM, and XPS analysis proved the successful decoration of MIL-53(Al) over the AC platform. Cephalosporin antibiotics cefixime (CFX) and cephalexin (CPX), which are often present in wastewaters, were utilized to examine the sorption capacity of the nanocomposite. The significant influential factors such as pH, temperature, sorbent amount, ionic strength, and impurity were discussed. At an initial pH of 7.0 ± 0.1, the highest sorption capacities of CFX and CPX on MIL-53(Al)@AC were 784.14 and 747.91 mg g −1 (T = 298 K, and sorbent amount = 0.1 g L −1 ), which were 1.43 and 1.47 times greater compared to that of MIL-53(Al), respectively. The evaluation of experimental results was implemented through the Langmuir and Freundlich isotherm equations. The isothermal data were described nobly by the Freundlich isotherm, which confirmed multilayer adsorption on heterogeneous surfaces (R 2 > 0.970). A kinetic study indicated that the nanocomposite could adsorb the majority of cephalosporin antibiotics within 30 min. In addition, the experimental data were evaluated via pseudo-first-order, pseudo-second-order, and intraparticle diffusion models. The results indicated that the pseudosecond-order equation agreed more closely with the kinetic data (R 2 > 0.990). Furthermore, the processes of adsorption were exothermic and spontaneous. The electrostatic attraction, hydrophobic interaction, π−π electron donor−acceptor effect, H-bond, and π−π stacking constituted the main sorption mechanisms. Finally, MIL-53(Al)@AC presented an excellent regeneration performance. Thus, the results revealed the potential application of the MIL-53(Al)@AC nanocomposite for water remediation.

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Section: ■ Results and Discussionsupporting

confidence: 52%