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Graduate Student or Post Graduate
01 August 2018 - 31 August 2021
President, CEO or Director
01 March 2017 - 31 August 2021
Research Director
01 March 2015 - 01 July 2018
Research Director
01 August 2010 - 01 March 2015
Maria I. Gaviria, currently Ph.D. (c) in Environmental Engineering at University of Antioquia and CEO of Taxia mentoring start-up. Degree in Biological Engineering from the National University of Colombia (graduation year 2009) and master’s in engineering from University of Antioquia (graduation year 2015). Up to 10 years of experience in innovation and development processes, applying cutting-edge technologies like environmental biotechnology and green nanotechnology. Previous positions in R&D manager at EIA University and Biotechnology chief in SENA. More than 5 years of experience in consulting technology-based projects focused on sustainability and cleaner production. Senior consultant in innovation and circular economy for Taxia mentoring and Distilled innovation. Active research lines in environmental biotechnology, environmental nanotechnology, pollution and quality of water, environmental microbiology, and treatment of dangerous pollutants in water. National doctoral fellowship from Minciencias (2018-present) and Swiss government fellowship from University of St.Gallen (AIT program 2020-2021).
Biochar-derived C-Dots from Picea, Molinia caerulea and Elaeis guineensis were synthesized through a hydrothermal process, and their physicochemical and optical characteristics and environmental effects were compared. These C-Dots were characterized by techniques such as Attenuated Total Reflection–Fourier Transform Infrared (ATR-FTIR), UV-Vis spectrophotometry, fluorescence spectroscopy, dynamic light scattering (DLS), Z potential, and High-Resolution Transmission Electronical Microscopy (HR-TEM). The ecotoxicity tests were performed using the Microtox™ test, making this study one of the few that use this method. The C-Dots from Molinia caerulea showed the best quantum yield (QY) of 8.39% and moderate ecotoxicity, while Elaeis guineensis has the lowest QY (2.31%) but with zero toxicity. Furthermore, the C-Dots from Picea presents good optical properties but showed high toxicity and limits its use. Finally, all C-Dots showed functional groups that could be biofunctionalized with biomolecules, especially C-Dots from Molinia caerulea and Elaeis guineensis show potential for use in the development of optical biosensors.
Kaory Barrientos; Maria Gaviria; Juan Arango; Jersson Placido; Sandra Bustamante; Martha Londoño; Marisol Jaramillo. Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm. Processes 2021, 9, 1095 .
AMA StyleKaory Barrientos, Maria Gaviria, Juan Arango, Jersson Placido, Sandra Bustamante, Martha Londoño, Marisol Jaramillo. Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm. Processes. 2021; 9 (7):1095.
Chicago/Turabian StyleKaory Barrientos; Maria Gaviria; Juan Arango; Jersson Placido; Sandra Bustamante; Martha Londoño; Marisol Jaramillo. 2021. "Synthesis, Characterization and Ecotoxicity Evaluation of Biochar-Derived Carbon Dots from Spruce Tree, Purple Moor-Grass and African Oil Palm." Processes 9, no. 7: 1095.
The growing interest in nanomaterials with advanced optoelectronic properties has promoted the advancement of biosensors with various applications. In the environmental field, the need for rapid detection of pollutants in water sources has opened the door to fluorescent biosensors. These systems are quite sensitive and simple. Nanomaterials such as carbon dots (CD), quantum dots (QD), gold nanoparticles, nanoclusters, graphene (G), graphene oxide (GO), transition metal dialcogens (TMDC) and organometallic frameworks (MOF), have been used in the development of fluorescent detection systems. They are usually based on the Förster resonance energy transfer (FRET) quenching principle. Nanomaterials can be bioconjugated with molecules such as antibodies, enzymes or aptamers, to achieve specific detection of the target pollutant, even in real samples. This review conducts a critical analysis of the operating principle of different nanomaterial-based fluorescent biosensors. We discuss the detection of substances of high concern like heavy metals, pesticides, and so-called emerging contaminants. The advantages and disadvantages of the methods are discussed, as well as recommendations for future approaches and a possible massification of these systems.
María Isabel Gaviria-Arroyave; Juan B. Cano; Gustavo A. Peñuela. Nanomaterial-based fluorescent biosensors for monitoring environmental pollutants: A critical review. Talanta Open 2020, 2, 100006 .
AMA StyleMaría Isabel Gaviria-Arroyave, Juan B. Cano, Gustavo A. Peñuela. Nanomaterial-based fluorescent biosensors for monitoring environmental pollutants: A critical review. Talanta Open. 2020; 2 ():100006.
Chicago/Turabian StyleMaría Isabel Gaviria-Arroyave; Juan B. Cano; Gustavo A. Peñuela. 2020. "Nanomaterial-based fluorescent biosensors for monitoring environmental pollutants: A critical review." Talanta Open 2, no. : 100006.
Effluents from the textile industry have a negative environmental impact due to their high load of dyes and hard-to-remove compounds: additives, detergents, and surfactants; these must be treated before effluents can be discharged into water. White-rot fungi show great potential for the bioremediation of water and soil matrices contaminated with recalcitrant pollutants (these are generally toxic). In this work, we designed a 5 L fixed bed reactor and evaluated its performance on the degradation of pollutants in effluents from the textile industry in continuous-operation mode under non-sterile conditions, using ligninolytic fungus Bjerkandera sp. (anamorphic state R1). This setup was based on a previous design of a 0.25 L fixed-bed model bioreactor. The system was designed by taking into account the geometric and hydrodynamic similarities of both setups. In continuous-mode color-removal assays, the bioreactor was operated at a 36 h Hydraulic retention time (HRT), a 1 L/min air flux at 33 °C, and a dye concentration of 75 g/L (sulfur black 1) and 6.5 g/L (indigo Vat blue 1). 69% of the dye was removed, and changes in the chemical structures of the dyes confirmed the ligninolytic activity of the microorganism as the main dye removal mechanism.
Maria Gaviria; Escuela De Ingeniería De Antioquia. Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp. Revista Facultad de Ingeniería Universidad de Antioquia 2018, 80 -90.
AMA StyleMaria Gaviria, Escuela De Ingeniería De Antioquia. Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp. Revista Facultad de Ingeniería Universidad de Antioquia. 2018; (88):80-90.
Chicago/Turabian StyleMaria Gaviria; Escuela De Ingeniería De Antioquia. 2018. "Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp." Revista Facultad de Ingeniería Universidad de Antioquia , no. 88: 80-90.