Surface-passivated rGO@CuO/6A5N2TU colloidal heterostructures for efficient removal of ofloxacin from contaminated water through dual-mode complexation: insights into kinetics and adsorption isotherm model study

A review of the antibiotic ofloxacin: Current status of ecotoxicology and scientific advances in its removal from aqueous systems by adsorption technology

“…x pseudo-second order/not linear 0.99 [54] Thermal kaolin 250 pseudo-second order/not linear 0.97 [64] Bentonite clay 200 pseudo-second order/not linear 0.99 [56] Rice husk 480 pseudo-second order/not linear 0.99 [129] Boron nitride nanosheets 100 pseudo-second order/not linear 0.99 [130] Hydroxyapatite/activated carbon (HAP/AC) 60 pseudo-second order/not linear 0.97 [50] Rice husk ash 180 pseudo-second order/not linear 0.97 [38] Chitosan/Biochar Composite 30 pseudo-second order/not linear 0.95 [132] AC derived from luffa sponge 240 pseudo-second order/not linear 0.99 [11] Magnetic carboxylated cellulose nanocrystals (M-CCNs) 20 pseudo-second order/not linear 0.99 [133] rGO-MoS2 heterostructure 240 pseudo-second order/linear 0.91 [57] AC from Cassava Stem 120 pseudo-second order/linear 0.98 [55] Fe/Cu oxides composite 20 Double-constant rate equation/not linear 0.99 [46] Fe/Co bimetallic modified biochar 360 pseudo-second order/not linear 0.97 [58] Copper-Doped ZIF-8 180 pseudo-second order/not linear 0.99 [21] Fe3O4@MIL-100(Fe) 30 pseudo-second order/not linear 0.97 [51] Zeolitic Imidazolate Framework-8 (ZIF-8) 120 pseudo-second order/not linear 0.99 [52] Bagasse biochar 90 pseudo-second order/linear 0.99 [59] rGO@CuO/6A5N2TU colloidal heterostructures 50 pseudo-second order/not linear 0.99 [60] Coal fly ash 150 pseudo-second order/not linear 0.99 [135] Industrial sludge (AC) 240 pseudo-second order/not linear 0.94 [61]…”

“…Three studies observed an exothermic behavior (∆H°<0), where the augmentation in temperature in the system diminished the adsorption of OFL, being desirable adsorbents to be applied in real 369 conditions. The studies used rGO@CuO/6A5N2TU colloidal heterostructures [60], rGO-MoS2 370 heterostructure [57], and AC derived from luffa sponge [11] as adsorbents for the 371 temperatures of 293 and 298 K. Therefore, the exothermic behavior is not only related to 372 heterostructures, but also carbonaceous materials of vegetal origin.…”

“…strong hydrogen bonding, complexation of unsaturated metals, and π-π stacking [54] Thermal kaolin chemosorption and electrostatic interactions [64] Rice husk electrostatic interaction [129] Hydroxyapatite/activated carbon (HAP/AC) strong hydrogen bonding [50] Carboxymethyl cross-linked lignin hydrogen bonding, electrostatic attraction, electron-donor-π-π-acceptor interactions, and negative chargeassisted hydrogen bonding [134] AC from Cassava Stem physisorption [55] Fe/Cu oxides composite hydrogen bonds, π-π stacking interactions, surface complexation, hydrophobic interaction [46] Fe/Co bimetallic modified biochar electrostatic interactions, hydrogen bonding, hydrophobic interactions, complexation, and π-π electron donoracceptor interactions [58] Copper-Doped ZIF-8 π-π interaction [21] Fe3O4@MIL-100(Fe) π-π interaction and H-bonding [51] Zeolitic Imidazolate Framework-8 (ZIF-8) complexation of unsaturated metals, hydrogen bonding, and electrostatic interactions [52] Bagasse biochar π-π bond interactions, hydrophobic interactions, hydrogen bonds, electrostatic interactions, and ion exchange [59] rGO@CuO/6A5N2TU colloidal heterostructures Coordinate bond, π-π stacking, and hydrogen bonding [60] Industrial sludge (AC) electron donoracceptor interactions, π-π interaction, and H-bonding [61]…”

“…Temperature also greatly influenced the adsorption of OFL, where in most studies, its increase positively favored the adsorption of the antibiotic from the aqueous medium [46,49,[53][54][55][56]. Among the other parameters, the desorption and reuse of the adsorbent [52,[57][58][59][60][61] and the influence of the coexistence of other drugs and ions in the adsorption process were also extensively explored by the authors [21,38,48,49,53,57,58,[62][63][64][65].…”

Efficient Adsorption of Toxic Heavy Metal Ions on the Surface Engineered Violuric Acid-Reduced Graphene Oxide Nanomaterial

“…Our earlier reports on the uracil-GO/rGO nanocomposites suggest that the addition of uracil derivatives to GO/rGO can increase the rate of metal complexation and antibiotic removal by providing more ligation sites. − Further, the presence of multiple metal ligation sites in the VA can complex with metal ions (M 2+ and M 3+ ). − Meanwhile, the high surface-to-volume ratio and the presence of edge defects of graphene sheets can suitably adsorb various metal complexes.…”