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  1. Article ; Online: Analysis of scientific and technological trends in the incorporation of activated carbon in advanced oxidation processes-a bibliometric study.

    Montenegro-Apraez, Diego / Machuca-Martínez, Fiderman

    Environmental science and pollution research international

    2023  

    Abstract: There is high interest in the development of water pollution remediation technologies. Advanced oxidation processes (AOPs) are a promising alternative for the degradation of organic compounds; however, these technologies have been limited mainly by high ... ...

    Abstract There is high interest in the development of water pollution remediation technologies. Advanced oxidation processes (AOPs) are a promising alternative for the degradation of organic compounds; however, these technologies have been limited mainly by high operating costs and, in some cases, by forming byproducts, which can be more hazardous than the original pollutants. Activated carbon (AC) is a porous material that can be combined with AOP systems in various ways, given its adsorbent and catalytic characteristics. In addition, AC is a flexible, adaptable, and low-cost material. This article presents a bibliometric analysis of AOPs incorporating CA in scientific research and patents; the Scopus database was used to obtain patents and Orbit Express for patents. The most investigated AOPs incorporating AC are photocatalysis processes, Fenton processes, persulfate-based AOP, electrochemical processes, and ozonation. However, it is the persulfate-based AOP that has seen the greatest growth in scientific publications in recent years; this great interest can be related to the synergy that the process has with AC, allowing the degradation of contaminants via radical and non-radical. According to the maturity analysis of scientific publications, photocatalysis, Fenton, electrochemistry, ozonation, and persulfate technologies are in a growth stage and will reach maturity in 2034, 2042, 2040, 2034, and 2035, respectively; these technologies coupled with AC are expected to generate a greater number of patents when they reach maturity.
    Language English
    Publishing date 2023-12-23
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-023-31120-4
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  2. Article ; Online: Scientific and academic contributions of professor Enric Brillas through an analysis social network analysis and data science.

    Jennyfer, Diaz-Angulo / Jose, Lara-Ramos / Fiderman, Machuca-Martínez

    Chemosphere

    2023  Volume 345, Page(s) 140466

    Abstract: This work describes the scientific and academic contributions of Professor Enric Brillas through the analysis of Social Network Analysis and data science. The study examines the research collaborations and co-authorship networks of Professor Brillas, ... ...

    Abstract This work describes the scientific and academic contributions of Professor Enric Brillas through the analysis of Social Network Analysis and data science. The study examines the research collaborations and co-authorship networks of Professor Brillas, indicating his active engagement and up-to-date collaborations with key co-authors, including Ignasi Sirés and Pere.L. Cabot. The analysis also reveals Professor Brillas' significant research focus on water treatment and related concepts such as oxidation-reduction, Fenton reactions, photoelectro-Fenton, and electrocatalysis. Furthermore, the most cited and recent articles by Professor Brillas are identified and discusses. Overall, the research demonstrates Professor Brillas' notable contributions to the field of electrochemical water treatment and highlights his ongoing research and collaborations in this area.
    MeSH term(s) Data Science ; Social Network Analysis ; Authorship ; Oxidation-Reduction
    Language English
    Publishing date 2023-10-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.140466
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  3. Article: New approach for the dimensionless analysis of a unidirectional flow solar reactor based on Damköhler's number profiles.

    Otálvaro-Marín, Héctor L / Machuca-Martínez, Fiderman

    Heliyon

    2021  Volume 7, Issue 5, Page(s) e06969

    Abstract: A methodology for the analysis of the behavior of complex reactors based on the construction of profiles of a dimensionless number (Damköhler) for each main chemical species ( ...

    Abstract A methodology for the analysis of the behavior of complex reactors based on the construction of profiles of a dimensionless number (Damköhler) for each main chemical species (
    Language English
    Publishing date 2021-05-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2021.e06969
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  4. Article ; Online: The occurrence of emerging compounds in real urban wastewater before and after the COVID-19 pandemic in Cali, Colombia.

    Jiménez-Bambague, Eliana M / Madera-Parra, Carlos A / Machuca-Martinez, Fiderman

    Current opinion in environmental science & health

    2023  Volume 33, Page(s) 100457

    Abstract: The COVID-19 pandemic is considered one of the most significant global disasters in the last years. The rapid increase in infections, deaths, treatment, and the vaccination process has resulted in the excessive use of pharmaceuticals that have entered ... ...

    Abstract The COVID-19 pandemic is considered one of the most significant global disasters in the last years. The rapid increase in infections, deaths, treatment, and the vaccination process has resulted in the excessive use of pharmaceuticals that have entered the environment as micropollutants. Considering the prior information about the presence of pharmaceuticals found in the wastewater of Cali, Colombia, which was collected from 2015 to 2022. The data monitored after the COVID-19 pandemic showed an increase in the concentration of analgesics and anti-inflammatory drugs of up to 91%. This increase was associated with the consumption of pharmaceuticals for mild symptoms, such as fever and pain. Moreover, the increase in concentration of pharmaceuticals poses a highly ecological threat, which was up to 14 times higher than that reported before of COVID-19 pandemic. These results showed that the COVID-19 had not only impacted human health but also had an effect on environmental health.
    Language English
    Publishing date 2023-03-10
    Publishing country Netherlands
    Document type Journal Article ; Review
    ISSN 2468-5844
    ISSN (online) 2468-5844
    DOI 10.1016/j.coesh.2023.100457
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  5. Article ; Online: Perspectives from different disciplines for research, education and innovation in times of crisis ; Las perspectivas desde las diferentes disciplinas para la investigación, la educación y la innovación en tiempos de crisis

    Machuca-Martinez, Fiderman

    INGENIERIA Y COMPETITIVIDAD; Vol 23 No; e10543 ; Ingeniería y Competitividad; ##issue.vol## 23 ##issue.no## 1 (2021): Ingeniería y Competitividad: In press; e10543 ; INGENIERÍA Y COMPETITIVIDAD; Vol. 23 Núm. 1 (2021): Ingeniería y Competitividad: In press; e10543 ; 2027-8284 ; 0123-3033 ; 10.25100/iyc.v23i1

    2021  Volume 1, Issue : Engineering and Competitiveness

    Abstract: The SARS-CoV-2 modified the way we interact at all levels, from the family to the institutional. Humanity has been affected in previous times by pandemics and viruses, however, none in the recent past had had such a significant and widespread impact on ... ...

    Abstract The SARS-CoV-2 modified the way we interact at all levels, from the family to the institutional. Humanity has been affected in previous times by pandemics and viruses, however, none in the recent past had had such a significant and widespread impact on the entire world. This is how this situation has led to changes in personal, professional, and institutional expectations and goals. In consideration of the above, it can then be affirmed that those who participate in the National System of Science and Technology and Innovation are not alien to this situation and are aware that the indicators that measure their level of performance are going to be modified during this 2020 and by course in the next few years.

    El SARS-CoV-2 modificó la forma de relacionarnos a todo nivel, desde el familiar hasta el institucional. La humanidad se ha visto afectada en épocas anteriores por pandemias y virus, sin embargo, ninguna en el pasado reciente había tenido tanto impacto de manera importante y generalizada para el mundo entero. Es así como esta coyuntura ha llevado a que se modifiquen las expectativas y metas personales, profesionales e institucionales. En consideración de lo anterior se puede entonces afirmar que quienes participan del Sistema Nacional de Ciencia y Tecnología e Innovación, tampoco son ajenos a esta situación y son conscientes que los indicadores que miden su nivel de desempeño se van a ver modificados durante este 2020 y por supuesto en los próximos años.
    Keywords covid19
    Language Spanish
    Publishing date 2020-09-10
    Publisher Facultad de Ingeniería- Universidad del Valle
    Publishing country co
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Sizing of reactors by charts of Damköhler's number for solutions of dimensionless design equations.

    Otálvaro-Marín, Héctor L / Machuca-Martínez, Fiderman

    Heliyon

    2020  Volume 6, Issue 11, Page(s) e05386

    Abstract: The reaction kinetic rate and mass transport play an important role in the sizing and scale-up of reactors. The Damköhler's dimensionless number ( ...

    Abstract The reaction kinetic rate and mass transport play an important role in the sizing and scale-up of reactors. The Damköhler's dimensionless number (
    Language English
    Publishing date 2020-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2020.e05386
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  7. Article ; Online: Bicarbonate-Hydrogen Peroxide System for Treating Dyeing Wastewater: Degradation of Organic Pollutants and Color Removal.

    Urbina-Suarez, Néstor A / Rivera-Caicedo, Christian / González-Delgado, Ángel Darío / Barajas-Solano, Andrés F / Machuca-Martínez, Fiderman

    Toxics

    2023  Volume 11, Issue 4

    Abstract: The textile industry is a global economic driving force; however, it is also one of the most polluting industries, with highly toxic effluents which are complex to treat due to the recalcitrant nature of some compounds present in these effluents. This ... ...

    Abstract The textile industry is a global economic driving force; however, it is also one of the most polluting industries, with highly toxic effluents which are complex to treat due to the recalcitrant nature of some compounds present in these effluents. This research focuses on the removal of Chemical Oxygen Demand (COD), color, Total Organic Carbon (TOC), and Ammoniacal Nitrogen (N-NH
    Language English
    Publishing date 2023-04-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2733883-6
    ISSN 2305-6304 ; 2305-6304
    ISSN (online) 2305-6304
    ISSN 2305-6304
    DOI 10.3390/toxics11040366
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  8. Article: Water footprint in gold extraction: A case-study in Suárez, Cauca, Colombia.

    Alvarez-Pugliese, Christian E / Machuca-Martínez, Fiderman / Pérez-Rincón, Mario

    Heliyon

    2021  Volume 7, Issue 9, Page(s) e07949

    Abstract: This research deepens the analysis of the mineral water footprint, especially that of gold, in regions that are understudied and where mining has been an intensified extractive activity since the colonial era, as is the case in the northern part of ... ...

    Abstract This research deepens the analysis of the mineral water footprint, especially that of gold, in regions that are understudied and where mining has been an intensified extractive activity since the colonial era, as is the case in the northern part of department of Cauca in Colombia. Thus, the purpose was to estimate the water footprint indicators in gold mining in Suárez (Cauca, Colombia), to quantify the impacts generated by the non-returned water in the production process and the levels of pollutants in the wastewater, aimed to strength public policies, control strategies and mitigation that generates reductions in the impacts from mining activities on the environment. The blue water footprint was estimated in 79.91 m
    Language English
    Publishing date 2021-09-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2021.e07949
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  9. Article ; Online: New approach for the dimensionless analysis of a unidirectional flow solar reactor based on Damköhler's number profiles

    Héctor L. Otálvaro-Marín / Fiderman Machuca-Martínez

    Heliyon, Vol 7, Iss 5, Pp e06969- (2021)

    2021  

    Abstract: A methodology for the analysis of the behavior of complex reactors based on the construction of profiles of a dimensionless number (Damköhler) for each main chemical species (Dai) was proposed. A 4-chlorophenol mineralization reaction in a heterogeneous ... ...

    Abstract A methodology for the analysis of the behavior of complex reactors based on the construction of profiles of a dimensionless number (Damköhler) for each main chemical species (Dai) was proposed. A 4-chlorophenol mineralization reaction in a heterogeneous solar reactor with suspended TiO2 and addition of H2O2 with tubular geometry and radiation collectors, fluid flow and a recirculation system was selected as a complex model system in order to validate the approach. The dynamic behavior of the reactor in dimensionless variables was modeled as a function of Dai. Where Dai(z,t) is a local property and grouped the optical and surface's properties of the catalyst, catalyst load, radiation intensity, the photon absorption rate, rate of non-photochemical reactions, the H2O2 effect, the reaction rate of different stages like adsorption, attack of radicals, surface reactions, plus design and operation variables like reactor volume and volumetric flow.A coupling of orthogonal collocation and Runge-Kutta methods were used to solve the PDEs and carry out the simulations to the different experimental conditions, resulting in profiles of Dai, Ci, and conversion in function of time and space. The Dai profiles proposed in the new methodology are capable of describing the disturbances in solar reactors, to indicate consumption and generation rates, instantaneous changes of reaction rate, to describe competitive reactions and quenching effects and to determine equilibrium concentrations, all of the above at each time and space. Therefore, this approach is a analysis tool of reactors which complements the concentration profile. This methodology can be extended to other reactive systems, adapting the intrinsic reaction rates.
    Keywords Photoreactor ; Tubular reactor ; Scaling-up ; Reactor design ; Modeling ; Finite differences ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
    Subject code 660
    Language English
    Publishing date 2021-05-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Performance of a pilot-scale BDD reactor by numerical analysis of reaction rate parameters and additional numbers for mass transfers.

    Lara-Ramos, José Antonio / Diaz-Angulo, Jennyfer / Mosquera-Vargas, Edgar / Mueses, Miguel A / Machuca-Martínez, Fiderman

    Chemosphere

    2023  Volume 341, Page(s) 139988

    Abstract: The performance of a pilot-scale boron-doped diamond (BDD) reactor through a numerical analysis of reaction rate parameters and enhanced mass transfer has been investigated. The main objective of this research is to evaluate the efficiency of the reactor ...

    Abstract The performance of a pilot-scale boron-doped diamond (BDD) reactor through a numerical analysis of reaction rate parameters and enhanced mass transfer has been investigated. The main objective of this research is to evaluate the efficiency of the reactor in mineralizing and degrading caffeine as an emerging contaminant. Based on the kinetic mechanisms and mass transport correlations reported in the literature, two reaction rate kinetic models for caffeine degradation are proposed and analyzed. The models consider different electrolytes (NaCl and Na
    MeSH term(s) Sodium Chloride ; Caffeine ; Electricity ; Industry ; Kinetics
    Chemical Substances Sodium Chloride (451W47IQ8X) ; Caffeine (3G6A5W338E)
    Language English
    Publishing date 2023-09-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2023.139988
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