Natural Clay (El-Hicha) from Gabès (Tunisia) as Adsorbent for the Efficient Removal of Ciprofloxacin from Wastewater.

EasyChair Preprint 10737

Abstract

The presence of Ciprofloxacin in wastewater and surface water has been widely
reported, is becoming a growing concern due to its toxicological effect on aquatic
species and has been efficiently removed from wastewater by adsorption using natural
clay collected from Gabes region (Tunisia). The textural, chemical-surface, structural,
and morphological properties of the clay-based adsorbent was examined, finding low-
moderate specific surface area value (18.1 m 2 g -1 ) and a structure coincident with the
smectite phase. Adsorption kinetic study revealed that clay reached the equilibrium in
(420 min) ~ 7 h, achieving a CIP removal percentage of 80 %. Pseudo-second-order
kinetic model describes well the kinetic adsorption experimental data. The
equilibrium adsorption capacity (q e = 177.8 mg g 1 ) was obtained for clay el-Hicha.
The Freundlich adsorption model led to the best-fitting results, suitable for
heterogeneous adsorptive systems. From pH studies, considering the dissociation
constants of the CIP molecule, working at solution pH = 6 led to the best adsorption
results.

Keyphrases: Adsorption, CH:clay el-Hicha, Ciprofloxacin, Wastewater.

@booklet{EasyChair:10737,
  author    = {Amira Hrichi and Pablo Gutiérrez Sánchez and Juan Manuel Garrido Zoido and Silvia Alvarez Torellas and Marcos Larriba Martinez and Maria Victoria Gil Álvarez and Hedi Benamor and Juan Garcia Rodriguez},
  title     = {Natural Clay (El-Hicha) from Gabès (Tunisia) as Adsorbent for the Efficient Removal of Ciprofloxacin from Wastewater.},
  howpublished = {EasyChair Preprint 10737},
  year      = {EasyChair, 2023}}