A comparison was made for the adsorption capacity of ciprofloxacin (CPX) on three types of carbon-based
materials: activated carbon, carbon nanotubes and carbon xerogel. The obtained samples were characterised
by adsorption of N2 at−196 ◦C, determination of the point of zero charge and by temperature
programmed desorption. The Langmuir and Freundlich models were used to describe the equilibrium
isotherms obtained. Adsorption capacities ranging from approximately 112 to 231 mgCPX gC−1 were
obtained (for carbon xerogel and activated carbon, respectively). The influence of the textural and surface
properties of the carbon materials on the CPX adsorption was discussed and it was shown that the carbon
nanotubes sample presents the best performance per unit surface area.