Efficient Removal of Nonylphenol Isomers from Water by Use of Organo-Hydrotalcites
Autor
Cosano, Daniel
Esquivel, Dolores
Romero-Salguero, F.J.
Jiménez-Sanchidrián, César
Ruiz, José Rafael
Editor
MDPIFecha
2022Materia
HydrotalciteDeoxycholate
Adsorption
Nonylphenol removal
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The presence of potent organic endocrine-disrupting chemicals (EDCs) in natural aquifers can have adverse impacts on public health and the environment. 4-nonylphenol, one such EDC, can be efficiently removed from water by adsorption onto a clayey material. In this work, we created an effective sorbent for this purpose by using co-precipitation and subsequent ion-exchange to intercalate the organic anion deoxycholate into a Mg/Al hydrotalcite. Intercalating deoxycholate ions increased the organophilicity of the hydrotalcite surface. The solid was used to adsorb 4-nonylphenol at different pollutant concentrations and temperatures. The adsorption process was subjected to a kinetic study. Based on the results, the EDC was adsorbed by chemisorption. In addition, based on the equilibrium isotherms used for the process, the Freundlich model was the most accurate in reproducing the adsorption of 4-nonylphenol onto deoxycholate-intercalated hydrotalcite.