Development and physicochemical characterization of a new magnetic nanocomposite as an economic antibiotic remover

•A new magnetic nanocomposite (MTWNC) was synthesized and fully characterized.•Nanocomposite could be separated from the treated solution by a permanent magnet.•Adsorption of tetracycline antibiotic on MTWNC reached to 60.60mg/g.•Desorption studies were performed to evaluate adsorbent efficiency. Ma...

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Bibliographic Details
Published in:Process safety and environmental protection 2015-03, Vol.94, p.441-451
Main Authors: Akkaya Sayğılı, Gülbahar, Sayğılı, Hasan, Koyuncu, Filiz, Güzel, Fuat
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Carbon
Economics
Lycopersicon esculentum
Magnetic nanocomposite
Mathematical models
Nanoporous carbon
Nanostructure
Regeneration
Surface chemistry
Tetracycline adsorption
Tomato waste
Wastewater treatment
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Summary:•A new magnetic nanocomposite (MTWNC) was synthesized and fully characterized.•Nanocomposite could be separated from the treated solution by a permanent magnet.•Adsorption of tetracycline antibiotic on MTWNC reached to 60.60mg/g.•Desorption studies were performed to evaluate adsorbent efficiency. Maghemite (ϒ-Fe2O3) nanoparticles were impregnated to nanoporous carbon obtained from tomato waste (TWNC). The prepared magnetic composite (MTWNC) was characterized and used to remove tetracycline (TC) from water and then easily be separated from the medium by a magnetic technique. The morphologies and surface chemistries of both magnetic and non-magnetic nanoporous carbons were studied by FTIR, XRD, SEM, SEM-EDX, VSM, BET surface area, proximate and elemental analysis determinations. Batch adsorption studies were carried out and the effects of pH, initial TC concentration, adsorbent dose, ionic strength and temperature were investigated. The adsorption kinetics of TC on MTWNC could be expressed well by the pseudo-second order model, and sorption isotherms were described by Langmuir equation with maximum adsorption capacity of 60.60mg/g at pH 4 and 50°C. Thermodynamic parameters showed that the adsorption of TC onto MTWNC was feasible, spontaneous and endothermic. Furthermore, the recyclability of the adsorbent was tested with 0.01M NaOH solution, and the results show that the synthesized composite adsorbent could be employed repeatedly in wastewater treatment.
ISSN:0957-5820
1744-3598
DOI:10.1016/j.psep.2014.10.005