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Magnetic nanoadsorbent functionalized with aminophosphonic acid for NdIII ion extraction from aqueous media by Lorena Molina-Calderón; Carlos Basualto-Flores; Verónica Paredes-García; Marlen Gutierrez-Cutiño; Diego Venegas-Yazigi is a Chemical Engineering article available to read on EtoBox.

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The adsorption performance of a new magnetic nanoadsorbent of Nd3+ was investigated. First, the nanoadsorbent was synthesized by chemical coprecipitation, and covered with a silica layer by the sol–gel method to obtain the silica-coated magnetic nanoparticles (MNP@SiO2). Subsequently, it was functionalized with nitrilotris(methylene)triphosphonic acid(NTMP), obtaining the goal aminophosphonic-functionalized nanoadsorbent (MNP@SiO2-NTMP). The functionalized nanoadsorbent was characterized using TEM, XRD, VSM, TGA, ATR-FTIR, EDS, and zeta potential measurements, confirming its nanoscale size, superparamagnetic behavior, and the presence of surface amino-phosphonic groups. The influence of different operational parameters on neodymium adsorption was investigated. The highest adsorption capacity of neodymium(III) was approximately 18 mg·g−1 at pH 6.8, using an adsorbent dose of 1 g·L-1, a neodymium concentration of 100 mg·L-1, and a contact time of 15 min at room temperature. The neodymium(III) adsorption onto MNP@SiO2-NTMP followed a pseudosecond-order model, suggesting chemisorption mechanisms as the rate-limiting step. Batch experimental results showed that Nd3+ adsorption onto MNP@

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Author

Lorena Molina-Calderón; Carlos Basualto-Flores; Verónica Paredes-García; Marlen Gutierrez-Cutiño; Diego Venegas-Yazigi

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemical Engineering (Physical Sciences)