TY  - JOUR
T1  - Efficient adsorption of antibiotics using MXene nanosheet delaminated by Taylor vortex flow
AU  - Gupta, Kiran
AU  - Park, Jongwook
AU  - Im, Sang Hyuk
AU  - Kim, Woo-Sik
JO  - Separation and Purification Technology
VL  - 357
SP  - 130095
PY  - 2025
DA  - 2025/05/01/
SN  - 1383-5866
DO  - https://doi.org/10.1016/j.seppur.2024.130095
UR  - https://www.sciencedirect.com/science/article/pii/S1383586624038346
KW  - MXene
KW  - Taylor vortex flow
KW  - Turbulent eddy flow
KW  - Delamination
KW  - Fluoroquinolones (FQs)
KW  - Adsorption
AB  - MXenes are emerging as a promising class of two-dimensional (2D) adsorbents suitable for various environmental applications. The present study explores the use of Ti3C2Tx MXene nanosheet, delaminated by Taylor vortex flow (TVF), namely d-MXene-CT, as an efficient adsorbent for fluoroquinolones (FQs). The TVF induced in the gap between two coaxial cylinders of the Couette-Taylor reactor enhances the delamination process, yielding larger and thinner MXene nanosheets with a specific surface area 12 fold higher than that of nanosheets delaminated by turbulent eddy flow (TEF), namely d-MXene-MT in a conventional mixing tank (MT) reactor. As a result, the d-MXene-CT exhibited superior adsorption performance, with removal capacity for ciprofloxacin (CIP) of 349 mg/g and for levofloxacin (LEV) of 290.51 mg/g, representing 40 ∼ 60 % improvement over d-MXene-MT (249 mg/g for CIP and 180.22 mg/g for LEV). The adsorption process follows the pseudo-second-order kinetics model and fits the Langmuir isotherm, indicating the involvement of a monolayer chemisorption mechanism. Further investigation revealed that the removal of CIP and LEV was mainly driven by electrostatic attraction between oxygen functionality of MXene and protonated nitrogen group of FQs. The study highlights the potential of d-MXene-CT as a promising adsorbent for treating (FQs) from contaminant water.
ER  -