A5051229381- Advanced oxidation water treatment
- Water Quality Monitoring and Analysis
- Layered Double Hydroxides Synthesis and Applications
- Environmental remediation with nanomaterials
- Catalytic Processes in Materials Science
- Iron oxide chemistry and applications
- Clay minerals and soil interactions
- Water Treatment and Disinfection
- Analytical chemistry methods development
- Advanced Photocatalysis Techniques
- Parasitic Infections and Diagnostics
- Mesoporous Materials and Catalysis
- Pharmaceutical and Antibiotic Environmental Impacts
- Catalysis and Oxidation Reactions
- Carbon dioxide utilization in catalysis
- Wastewater Treatment and Nitrogen Removal
- Membrane Separation Technologies
- Aerogels and thermal insulation
- Environmental Chemistry and Analysis
- Industrial Gas Emission Control
- TiO2 Photocatalysis and Solar Cells
- Wastewater Treatment and Reuse
- Nanomaterials for catalytic reactions
- Material Selection and Properties
- Adsorption and biosorption for pollutant removal
University of Nariño
2015-2025
Paraguayan Center for Population Studies
2021
Hospital Pedro de Elizalde
2021
PAST Foundation
2018-2020
Universidad de Salamanca
2011
Universidad Nacional de Colombia
2010
AbstractThe low cost, natural origin, high stability, and great versatility for applications in adsorption catalysis have made pillared interlayered clays (PILCs) one of the families functional materials most intensively studied past three decades. PILCs involving several transition metals like Fe, Cu, or Mn are emerging nanomaterials exhibiting exceptional physicochemical properties. Besides, they also display excellent performance heterogeneous catalytic depletion organic pollutants...
Four natural clays were modified with mixed polyoxocations of Al/Fe for evaluating the effect physicochemical properties starting materials (chemical composition, abundance expandable clay phases, cationic exchange capacity and textural properties) on final catalytic Al/Fe-PILCs. The aluminosilicate denoted C2 exhibited highest potential as material in preparation Al/Fe-PILC catalysts, mainly due to its (192 meq/100 g) dioctahedral nature smectite phase. These characteristics favored...
Protozoan parasites such as Giardia duodenalis, Cryptosporidium spp., Cyclospora cayetanensis, Toxoplasma gondii and Entamoeba histolytica represent a great challenge to the systems producing water for human consumption because their cystic forms are persistent in environment resist disinfection methods conventionally used control. In this study, we investigated presence of these protozoan pathogens both raw treated samples production drinking Nariño Department, southwest Colombia. We...
The catalytic wet peroxide oxidation (CWPO) of the industrial azo-dye methyl orange (MO) activated by an Al/Fe-pillared clay catalyst was optimized Response-Surface Methodology (RSM). Three sequential sets factorial 2k central composite experiments were required for full optimization process; loading and stoichiometric dose hydrogen experimental factors studied through different times reaction means all, Dissolved Organic Carbon (DOC) removal, Total Nitrogen (TN) reacted fraction...
Abstract Urban water bodies serve as critical reservoirs of microbial diversity, with major implications for public health and environmental quality. This study aimed to characterize the diversity surface waters wastewater from Pasto River in Colombian Andean Highlands, offering insights that may support quality monitoring efforts. Sampling was conducted at three river sites one location. Standard physicochemical microbiological analyses were performed, including real-time PCR detect...
The complexity of the aquatic environment scenario, including impact urban wastewater, together with huge number potential hazardous compounds that may be present in waters, makes comprehensive characterization samples an analytical challenge, particularly relation to presence organic micropollutants (OMPs). Nowadays, high-resolution mass spectrometry (HRMS) for wide-scope screening environmental is out question. Considering physicochemical characteristics OMPs, coupling liquid (LC) and gas...
10 kg scale, significantly intensified preparation of Al/Fe-PILCs from intercalating solution ∼100 times more concentrated than usual and powered clay.
The analysis of SARS-CoV-2 in wastewater has enabled us to better understand the spread and evolution virus worldwide. To deepen our understanding its epidemiological genomic characteristics, we analyzed 10,147 sequences from 5 continents 21 countries that were deposited GISAID database up until January 31, 2023. Our results revealed over 100 independent lineages circulating water samples March 2020 2023, including variants interest concern. We observed four clearly defined periods global...
The modification of bentonite with Al-Fe species from different concentrated precursors at both stages: (i) the preparation (Al/Fe)-mixed pillaring solution and (ii) intercalation itself, was studied lab scale. final solids were characterized by X-ray fluorescence (XRF), diffraction (XRD), Cationic Exchange Capacity (CEC), textural analyses nitrogen adsorption-desorption 77 K, hydrogen-temperature programmed reduction (H2-TPR). Finally, modified clays assessed as active materials in...
The optimization of the Catalytic Wet Peroxide Oxidation (CWPO) assisted by an Al/Fe-pillared clay (Al/Fe-PILC) was assessed in inactivation MS2 coliphage presence a synthetic surrogate natural organic matter (NOM). simultaneous effect two experimental factors (i) H2O2 dose - (H2O2)d (3.00-25.50 % theoretically required for full mineralization) and (ii) catalyst concentration (0.33-2.60 g/L), four non-controllable variables (covariates) (a) circumneutral pH (6.00-9.00), (b) temperature...