Corrigendum to “Effective sequestration of tetracycline and ciprofloxacin from aqueous solutions by Al-based metal organic framework and reduced graphene oxide immobilized alginate biosorbents” [Chem. Eng. J. 450 (2022) 138068]

Ciprofloxacin adsorption performance of Co‐doped UiO‐66

“…No important change in the ciprofloxacin removal percentage was seen after 90 min. In literature studies, similar trend depending on contact time was observed 43,46 . In the initial stage, ciprofloxacin removal rate is considerably high owing to a large number of available active sites on the adsorbent surface.…”

“…ΔS° (40.24 kJ mol −1 K −1 ) value was contributed to increased randomness at the Co‐doped UiO‐66–ciprofloxacin molecule interface 62 . Literature works support the thermodynamic studies of the ciprofloxacin adsorption process in this study 43,45 . An increase in the temperature has synergistic effects on the ciprofloxacin adsorption by MOF‐based adsorbents.…”

“…At neutral pH, the ciprofloxacin solubility is considerably low, which caused hydrophobic interactions. Moreover, π–π interactions, effective at all pH values, occur between the benzene rings belonging to the Co‐doped UiO‐66 and aromatic ring of ciprofloxacin, conducting ciprofloxacin adsorption process 43 . Hydrogen bonds between ciprofloxacin molecules and the functional hydroxyl groups of the Co‐doped UiO‐66 also affect the adsorption process positively 44 …”

“…It was explained with the deterioration of ciprofloxacin desorption performance causing still presence of ciprofloxacin molecules on the Co‐doped UiO‐66 surface. In other words, decreasing active sites for the ciprofloxacin removal during the adsorption–desorption cycles had adverse effects on the Co‐doped UiO‐66 adsorption performance 43 . Furthermore, possible deterioration of the Co‐doped UiO‐66 surface resulted in a reduction in the ciprofloxacin adsorption capacity.…”