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{"title":"Porous Aluminum-Based Metal–Organic Framework–AminoclaynNanocomposite: Sustainable Synthesis and Ultrahigh Sorption of CephalosporinnAntibiotics","authors":"Javad Imanipoor (9634976), Mohsen Mohammadi (5593175)","doi":"10.1021/acs.langmuir.2c00557.s001","DOIUrl":"https://doi.org/10.1021/acs.langmuir.2c00557.s001","url":null,"abstract":"A novelnsorbent was synthesized based on MIL-53­(Al) MOF grown overnan aminoclay (AC) platform, called MIL-53­(Al)@AC nanocomposite, viana green and facile hydrothermal method. The nanocomposite was characterizednusing FT-IR, PXRD, BET, TEM, FESEM, EDS, XPS, TGA, DLS, and zeta potentialnanalyses. BET analysis represented the porous nature and great surfacenarea of MIL-53­(Al)@AC. The high crystalline structure for the synthesizednnanocomposite was verified using the PXRD pattern. FESEM, EDS, TEM,nand XPS analysis proved the successful decoration of MIL-53­(Al) overnthe AC platform. Cephalosporin antibiotics cefixime (CFX) and cephalexinn(CPX), which are often present in wastewaters, were utilized to examinenthe sorption capacity of the nanocomposite. The significant influentialnfactors such as pH, temperature, sorbent amount, ionic strength, andnimpurity were discussed. At an initial pH of 7.0 ± 0.1, the highestnsorption capacities of CFX and CPX on MIL-53­(Al)@AC were 784.14 andn747.91 mg g<sup>–1</sup> (<i>T</i> = 298 K, and sorbentnamount = 0.1 g L<sup>–1</sup>), which were 1.43 and 1.47 timesngreater compared to that of MIL-53­(Al), respectively. The evaluationnof experimental results was implemented through the Langmuir and Freundlichnisotherm equations. The isothermal data were described nobly by thenFreundlich isotherm, which confirmed multilayer adsorption on heterogeneousnsurfaces (<i>R</i><sup>2</sup> > 0.970). A kinetic studynindicated that the nanocomposite could adsorb the majority of cephalosporinnantibiotics within 30 min. In addition, the experimental data werenevaluated via pseudo-first-order, pseudo-second-order, and intraparticlendiffusion models. The results indicated that the pseudo-second-ordernequation agreed more closely with the kinetic data (<i>R</i><sup>2</sup> > 0.990). Furthermore, the processes of adsorptionnwerenexothermic and spontaneous. The electrostatic attraction, hydrophobicninteraction, π–π electron donor–acceptorneffect, H-bond, and π–π stacking constituted thenmain sorption mechanisms. Finally, MIL-53­(Al)@AC presented an excellentnregeneration performance. Thus, the results revealed the potentialnapplication of the MIL-53­(Al)@AC nanocomposite for water remediation.","PeriodicalId":523704,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147920484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}