Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

Author:

Venecia-Nuñez José David1,Ramírez-Parra Leidy Tatiana1,Lara-Ramos Jose Antonio2,Machuca-Martinez Fiderman2,Colina-Márquez José Ángel1,Mueses Miguel Angel1ORCID

Affiliation:

1. Universidad de Cartagena Chemical Engineering Department, Modeling & Application of Advanced Oxidation Processes, Photocatalysis & Photo-Reactors Engineering Zip Code 1382-Postal 195 Cartagena Colombia

2. Universidad del Valle Escuela de Ingeniería Química Ciudad Universitaria Meléndez, A.A. 25360 Cali Colombia

Abstract

AbstractCaffeine is found in significant concentrations in the environment due to bioaccumulation and high resistance to conventional and biological treatments. It has critical effects on aquatic species and human health. Intensification of photocatalysis based on ozone (O3)/ultraviolet (UV) radiation type C/goethite (GHT) was applied in the degradation and mineralization of caffeine in solution by using a heterogeneous stirred‐tank photoreactor with artificial light. O3 dose and GHT charge were established as perturbation variables, and the effects of speed of agitation, pH, initial caffeine concentration, and UV light were evaluated before intensification to find the best conditions. With the O3/UV/GHT process, a degree of degradation of ca. 99.97 % for caffeine in water was reached in less than 20 min. The degree of mineralization achieved was 38.02 %.

Funder

Universidad del Valle

Publisher

Wiley

Subject

Industrial and Manufacturing Engineering,General Chemical Engineering,General Chemistry

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