English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/61452
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Removing prometrone from water by clays and organic clays

AuthorsSocías Viciana, M. M.; Hermosín, M.C. ; Cornejo, J.
Issue Date1998
PublisherElsevier
CitationChemosphere 37(2): 289-300 (1998)
AbstractThe removing power of natural or inorganic clays and organoclays (OCls) for prometone from water was studied as related to the clay layer charge density, organic cation type and organic cation saturation degree of the clay. Two different natural smectites (high charge SAz and low charge SWy) and those treated with two alkylammonium cations (octadecylammonium and hexadecyltrimethylammonium) were assayed by measuring the adsorption isotherms and fitting the data to the Freundlich equation. The Freundlich parameter Kf, the distribution coefficients Kd0.3 and, that on organic carbon basis, Koc were calculated and used as relative measures of the sorption capacity. The inorganic original smectites show low and medium prometrone adsorption (Kf(SAz) = 29 and Kf(SWy) = 138 mmol/kg) inversely proportional to their layer charge density, although the relative sorption capacity depends on the prometrone concentration level. The OCls generally adsorb more prometrone (Kf from 61 to 1031 mmol/kg) than the inorganic samples. The organoclay characteristics favouring the prometrone sorption are high charge density, quaternary alkylammonium in the interlayer and organic cation saturation slightly below CEC. However, for low charge smectite primary alkylammonium and organic cation saturation above CEC promoted herbicide adsorption.
URIhttp://hdl.handle.net/10261/61452
DOI10.1016/S0045-6535(98)00047-2
Identifiersdoi: 10.1016/S0045-6535(98)00047-2
issn: 0045-6535
e-issn: 1879-1298
Appears in Collections:(IRNAS) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.