Preparation and utilization of cigarette filters based activated carbon for removal CIP and SDS from aqueous solutions

Abstract

The smoked cigarette filters were used to prepare high-surface-area activated carbons by KOH activation. The highest BET specific surface area of cigarette-filters-based activated carbon (CFAC) was 2726 m2·g−1 obtained at the activation parameter of carbonized materials/KOH = 1:5 and activation temperature of 900 °C, which could concluded that smoked cigarette filters were excellent raw materials for preparation activated carbons. The ciprofloxacin (CIP) and Sodium dodecyl sulfat (SDS) adsorption isotherms, adsorption kinetics and adsorption thermodynamics from aqueous solution using cigarette filters based activated carbon were investigated. The results indicated that Langmuir model and pseudo-second-order models were suitable to describe the CIP and SDS adsorption process of CFAC. More negative standard free energy (ΔG) and positive entropy change (ΔS) of CIP adsorption with increasing temperature indicated the spontaneous nature and increasing randomness of the CIP adsorption process. While More positive ΔG and negative ΔS of SDS adsorption indicated the non-spontaneous processes. The both positive enthalpy change (ΔH) indicated endothermic of CIP and SDS adsorption process.