Procesos fotocatalíticos y de adsorción para la eliminación de arsénico en disoluciones acuosas
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2019
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Universidad Rey Juan Carlos
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Resumen
This work aimed to study the removal of arsenic from aqueous solution by
photocatalytic and adsorption processes. The manuscript is organized in five parts.
The introductory revision, as being the state of the art of the topic, corresponds to
Part 1. Part 2 presents the thesis motivation that accounts for this work. In Part 3, the
synthesis of catalysts, procedures for the immobilization of TiO2 , the experimental
setups and analytical techniques, and the characterization techniques used to obtain
the experimental results are described. Part 4 consists on the report of the
experimental results and discussion of arsenic removal from aqueous systems by
photocatalytic and adsorption processes using titanium dioxide (TiO2 ) and iron
materials in slurry (Chapter 4.1) and immobilized (Chapter 4.2) configuration, and
graphitic carbon nitride (g-C3N4 ) in suspension (Chapter 4.3). On Chapter 4.1, it is
evaluated the efficacy of commercial catalysts (TiO2 and zero-valent iron or ZVI) and
synthesized catalysts (nano-scale ZVI, nZVI, and composites of TiO2 /nZVI with
different TiO2 :Fe ratio ).Chapter 4.2 is devoted to the study of photocatalytic activity
and reutilization feasibility of immobilized TiO2 over different pH conditions, in the
presence or absence of ZVI and nZVI. Chapter 4.3 includes the study of the activity
of g-C3N4 and g-C3N4 T500 (exfoliated) for the oxidation of As(III) under UV-LED and
visible-LED irradiation and the mechanism of this oxidation. Finally, Part 5 summarizes
the main conclusions of this work.
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Tesis Doctoral leída en la Universidad Rey Juan Carlos de Madrid en 2019. Directores de la Tesis: María José López Muñoz y Jesús María Arsuaga Ferreras
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