Adsorption kinetics of the antibiotic ciprofloxacin on bentonite, activated carbon, zeolite, and pumice

Autor:	Esra Can Dogan, Nevim Genç
Rok vydání:	2013
Předmět:	Chemistry Enthalpy Inorganic chemistry Ocean Engineering Sorption Pollution Endothermic process Gibbs free energy symbols.namesake Adsorption Bentonite medicine symbols Zeolite Water Science and Technology Activated carbon medicine.drug
Zdroj:	Desalination and Water Treatment. 53:785-793
ISSN:	1944-3986 1944-3994
DOI:	10.1080/19443994.2013.842504
Popis:	This study analyzes ciprofloxacin (CIP) sorption by bentonite, activated carbon, zeolite, and pumice, which have been recently considered for their potential use in the adsorption of specific pollutants. Batch experiments were performed to investigate the adsorption kinetics between the adsorbents surfaces and CIP. Adsorption kinetics for adsorbents were well described by the pseudo-second kinetic model. The amount of CIP adsorbed by the adsorbents at equilibrium showed the following sequence: bentonite > activated carbon > zeolite > pumice. The adsorption thermodynamic parameters of the free energy change, the isosteric enthalpy change, and the entropy change for 22°C were calculated. Thermodynamic of CIP adsorption shows that adsorption is the endothermic adsorption. The negative values of ΔG° for bentonite and activated carbon indicate the spontaneous nature of the adsorption. The positive value of ΔG° for zeolite and pumice indicates nonspontaneous nature of CIP adsorption. The positive entrop...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da785c8895cd0eeb6142eeb4bf58c78e https://doi.org/10.1080/19443994.2013.842504 Zobrazit plný text záznamu