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Removal of nitrophenol pesticides gfrom aqueous solutions by layered double hidroxides and their clacined products

AuthorsChaara, D.; Pavlovic, I.; Bruna González, Felipe ; Ulibarri Cormenzana, M. A.; Draoul, K.; Barriga, C.
Issue Date2010
CitationApplied Clay Science 50(3): 292-298 (2010)
AbstractThe ability of MgAl layered double hydroxides (LDHs) and their calcined products to adsorb the water contaminants 2,4-dinitrophenol (DNP) and 2-methyl-4,6-dinitrophenol (DNOC) was assessed. Adsorption tests were conducted on LDHs with variable Mg/Al ratios (and variable layer charge), pH values, contact times and initial pesticide concentrations to identify the optimum conditions for the intended purpose. Adsorbents and adsorption products were characterized by X-ray diffraction and FT-IR spectroscopy as well as atomic absorption spectroscopy and thermal analyses. The amounts of pesticides removed from water were determined by UV–Vis spectrophotometry. All adsorbents except the carbonate-containing hydrotalcite possessed a very high adsorption capacity for both contaminants.
Identifiersissn: 0169-1317
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