Agustín Spaltro, Sandra Simonetti, Sergio Laurella, Danila Ruiz, Andres Diaz Compañy, Alfredo Juan, Patricia Allegretti
Journal: Journal of contaminant hydrology 2019;227():103542
PMID: 31471099
In this study, silica and functionalized silica materials (3-aminopropyl and 3-mercapto derivatives) were successfully used for the removal of the pesticides bentazone and imazapyc from aqueous solutions. Adsorbent materials were characterized by BET isotherms and FT-IR spectroscopy (confirming the functionalization), and their equilibrium adsorption capacity was evaluated at different ionic strengths. It is observed that the maximum adsorption capacities decrease in the order 3-aminopropyl-derivative > silica >3-mercaptopropyl derivative. An increase in ionic strength produces an enhancement in the removal of pesticides. All isotherms are Ib-type and follow the Langmuir model, suggesting a monolayer physical adsorption process.
Copyright © 2019 Elsevier B.V. All rights reserved.
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