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Removal of ciprofloxacin from water by birnessite.
Jiang, Wei-Teh; Chang, Po-Hsiang; Wang, Ya-Siang; Tsai, Yolin; Jean, Jiin-Shuh; Li, Zhaohui; Krukowski, Keith.
Afiliación
  • Jiang WT; Department of Earth Sciences, National Cheng Kung University, Tainan 70101, Taiwan. atwtj@mail.ncku.edu.tw
J Hazard Mater ; 250-251: 362-9, 2013 Apr 15.
Article en En | MEDLINE | ID: mdl-23474410
With more pharmaceuticals and personal care products detected in the surface and waste waters, studies on interactions between these contaminants and soils or sediments have attracted great attention. In this study, the removal of ciprofloxacin (CIP), a fluoroquinolone antibiotic, by birnessite, a layered manganese oxide, in aqueous solution was investigated by batch studies supplemented by X-ray diffraction (XRD) and Fourier transform infrared analyses. Stoichiometric release of exchangeable cations accompanying CIP removal from water confirmed cation exchange as the major mechanism for CIP uptake by birnessite. Interlayer expansion after CIP adsorption on birnessite as revealed by XRD analyses indicated that intercalation contributed significantly to CIP uptake in addition to external surface adsorption. Correlation of CIP adsorption to specific surface area and cation exchange capacity suggested that the former was the limiting factor for CIP uptake. At the adsorption maximum, CIP molecules formed a monolayer on the birnessite surfaces. The adsorbed CIP could be partially removed using a cationic surfactant at a low initial concentration and mostly removed by AlCl3 at a higher initial concentration, which further supported the cation exchange mechanism for CIP removal by birnessite. The results indicated that the presence of layered Mn-oxide in the soil and waste water treatment systems may provide host for CIP accumulation.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Óxidos / Contaminantes Químicos del Agua / Ciprofloxacina / Purificación del Agua / Antiinfecciosos Idioma: En Revista: J Hazard Mater Año: 2013 Tipo del documento: Article País de afiliación: Taiwán

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Óxidos / Contaminantes Químicos del Agua / Ciprofloxacina / Purificación del Agua / Antiinfecciosos Idioma: En Revista: J Hazard Mater Año: 2013 Tipo del documento: Article País de afiliación: Taiwán