English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/40216
Title: A clay-vesicle system for water purification from organic pollutans
Authors: Undabeytia López, Tomás ; Nir, Shlomo ; Sánchez Verdejo, Trinidad ; Villaverde Capellán, J. ; Maqueda Porras, Celia ; Morillo González, Esmeralda
Keywords: Clay
Water purification
Sand filter
Organic pollutants
Issue Date: Feb-2008
Publisher: Elsevier
Citation: Water Research 42 (4-5): 1211-1219 (2008)
Abstract: Vesicle-clay complexes in which positively charged vesicles composed of didodecyldimethylammonium (DDAB) were adsorbed on montmorillonite removed efficiently anionic (sulfentrazone, imazaquin) and neutral (alachlor, atrazine) pollutants from water. These complexes (0.5% w:w) removed 92-100% of sulfentrazone,imazaquin and alachlor and 60% of atrazine from a solution containing 10 mg/L. A synergistic effect on the adsorption of atrazine was observed when all pollutants were present simultaneously (30 mg/L each), its percentage of removal being 85.5. Column filters (18 cm) filled with a mixture of quartz sand and vesicle-clay (100:1, w:w) were tested. For the passage of 1 L (25 pore volumes) of a solution including all the 11 pollutants at 10 mg/L each, removal was complete for sulfentrazone and imazaquin, 12 94% for alachlor and 53.1% for atrazine, whereas removal was significantly less efficient when using activated carbon. A similar advantage of the vesicle-clay filter was observed for the capacities of removal.
Description: 9 pages, 7 tables, 3 figures, 31 references.
Publisher version (URL): http://dx.doi.org/doi:10.1016/j.watres.2007.09.004
URI: http://hdl.handle.net/10261/40216
DOI: doi:10.1016/j.watres.2007.09.004
ISSN: 0043-1354
Appears in Collections:(IRNAS) Artículos
Files in This Item:
File Description SizeFormat 
A clay-vesicle system for water purification.pdf222,74 kBAdobe PDFThumbnail
Show full item record

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