Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Removal of sulfadiazine from aqueous solution on kaolinite
Abstract The adsorption of sulfadiazine onto kaolinite clay as an alternative adsorbent was examined in aqueous solution. Impacts of the contact time, pH, temperature, ionic strength and coexistent surfactants on the adsorption process were evaluated. The pH significantly influenced the adsorption process, with adsorption being promoted at lower pH due to the cation exchange mechanism. Decreasing ionic strength in the solution was favorable for adsorption, and the addition of cationic and anionic surfactants had negative effects on the adsorption capacity of sulfadiazine on kaolinite. Kinetic experiments showed that the adsorption followed the pseudo-second-order model. The equilibrium adsorption was well described by both Freundlich and Dubinin-Radushkevich (DR) models. According to the DR model, the adsorption mechanism was determined by cationic exchange and weak physical forces. The thermodynamic study showed that sulfadiazine adsorption onto kaolinite was a spontaneous and endothermic reaction.
Removal of sulfadiazine from aqueous solution on kaolinite
Abstract The adsorption of sulfadiazine onto kaolinite clay as an alternative adsorbent was examined in aqueous solution. Impacts of the contact time, pH, temperature, ionic strength and coexistent surfactants on the adsorption process were evaluated. The pH significantly influenced the adsorption process, with adsorption being promoted at lower pH due to the cation exchange mechanism. Decreasing ionic strength in the solution was favorable for adsorption, and the addition of cationic and anionic surfactants had negative effects on the adsorption capacity of sulfadiazine on kaolinite. Kinetic experiments showed that the adsorption followed the pseudo-second-order model. The equilibrium adsorption was well described by both Freundlich and Dubinin-Radushkevich (DR) models. According to the DR model, the adsorption mechanism was determined by cationic exchange and weak physical forces. The thermodynamic study showed that sulfadiazine adsorption onto kaolinite was a spontaneous and endothermic reaction.
Removal of sulfadiazine from aqueous solution on kaolinite
Xu, Jian (Autor:in) / He, Yan (Autor:in) / Zhang, Yuan (Autor:in) / Guo, Changsheng (Autor:in) / Li, Lei (Autor:in) / Wang, Yuqiu (Autor:in)
Frontiers of Environmental Science & Engineering ; 7 ; 836-843
26.04.2013
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Cd(II) adsorption from aqueous solution by raw and modified kaolinite
| Elsevier | 2013
Cd(II) adsorption from aqueous solution by raw and modified kaolinite
| Online Contents | 2014
Phenol Removal from Kaolinite by Electrokinetics
| British Library Online Contents | 1992