Deakin University

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Tuning the surface chemistry and porosity of waste-derived nanoporous materials toward exceptional performance in antibiotic adsorption: Experimental and DFT studies

journal contribution
posted on 2019-10-15, 00:00 authored by Masood Sheikh Alivand, M Najmi, N H M H Tehrani, A Kamali, O Tavakoli, A Rashidi, M D Esrafili, E Ghasemy, O Mazaheri
© 2019 In this research, preparation of waste-derived nanoporous carbon from Iranian asphaltene (IANC), which was further tuned and engineered to exceptionally adsorb amoxicillin (AMX) and metronidazole (MNZ) antibiotics, is reported. Structural tuning and surface modification of IANCs were carried out via melamine treatment and vapor functionalization (i.e., –COOH and –NH2), respectively. The M-IANC-3 as a superior melamine-modified adsorbent exhibited 43.8% higher mesoporosity compared with that of the pristine one (i.e., P-IANC-3), offering the maximum surface area (2693 m2/g), total pore volume (1.72 cm3/g) and mesopore volume (1.61 cm3/g), which correlated well with its high adsorption capacity of AMX (623 mg/g) and MNZ (447.8 mg/g). Furthermore, the amine functionalized IANC sample (i.e., IANC-NH2) impressively exhibited ultra-high AMX and MNZ adsorption capacity of 860.6 and 536.5 mg/g, respectively, through hydrogen bonding. Density functional theory calculations also confirmed that the functionalization of IANC with –NH2 group can greatly enhance the adsorption energy of AMX and MNZ due to more favorable electrostatic and charge-transfer effects. Overall, the results confirmed that the proposed process to optimize and tune the final properties of the adsorbent by melamine modification or amine functionalizing can be efficiently employed to develop high-performance nanoporous structures for antibiotic removal from wastewater effluents.



Chemical Engineering Journal




274 - 291




Amsterdam, The Netherlands





Publication classification

C1.1 Refereed article in a scholarly journal