Aumento del contenido de ácidos húmicos en un carbón de bajo rango a través de la oxidación con aire y con peróxido de hidrogeno o ácido nítrico

Anillo-Correa, Ruben; Colpas-Castillo, Fredy; Fuentes, Edgardo Meza

doi:10.1590/s0100-40422013000300007

Cited by 3 publications

(1 citation statement)

References 14 publications

(28 reference statements)

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“…Currently there are few studies that exist on the determination of structures and physicochemical analysis of carbons in the Caribbean region [3], studied five types of coals from different parts of the country, using ATR in the medium infrared, analysis next and last analysis, obtaining structural parameters that give an idea of the range of the coals [4][5], proposes the use of Cerrejón thermal carbons, in mixtures with coking coals. I select 6 coking coals and 10 thermal coals, which were characterized by DRIFTS, TGA and DSC.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical characterization of bituminous carbons from the Colombian Caribbean region

Colpas-Castillo¹,

Taron-Dunoyer²,

Mercado-Camargo³

2018

ces

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In the present studies characterization of mineral carbons, especially bituminous coal from the La Loma Cesar and the Cerrejón, will be carried out using FTIR and TGA-DCS techniques, knowing in advance that this is a relatively hard coal containing bitumen, between lignite and coal. Anthracite in the ligno-coal series. It is usually black, sometimes dark brown, often presenting a well-defined band of shiny, matte material. The bituminous coal veins are identified stratigraphically by the distinctive sequence of bright and dark bands; the results obtained from the characterization conclude that the coals of the Caribbean, Colombian region, are bituminous, thermal, with high volatile content and low ash content. The FTIR analysis shows that Cerrejon coal has a large amount of water and phenolic groups that in the Loma Cesar coal; while the latter shows the greater presence of inorganic material type Si-O, Si-O-Al, Fe-O and Zn-O according to infrared spectroscopy analysis. The analysis of TGA-DSC showed that the temperature, rate, and energy in both carbons showed differences in terms of evaporation, volatilization, and combustion that can define the structure of each one.

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Section: Introductionmentioning

confidence: 99%

Physicochemical characterization of bituminous carbons from the Colombian Caribbean region

Colpas-Castillo¹,

Taron-Dunoyer²,

Mercado-Camargo³

2018

ces

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Extraction of Humic Acids from Different Origins: A Review

Quiroz-Urzola

Castro-Suarez

Colpas-Castillo

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The synthesis of molecules such as humic acids is a good strategy for the remediation of eroded soils. Since the synthesis and extraction of these carbon molecules do not represent a process of energy liberation of the carbon, it is also a low-cost process. Bad practices in soils, such as the indiscriminate use of pesticides and pesticides, cause damage to the soil that can be difficult to reverse, depending on the type of exposure and resilience they have. For example, the Atlantic coast is the most affected by salinization, according to Ideam a phenomenon related to incorrect agricultural activities, devastating tourism, and the impact of the dry climate. Soil erosion is an effect that has a negative influence on activities such as agriculture since the erosion of the soils prevents or causes the agricultural activity to be low or almost nil. Humic acids are molecules that can retain cations in their macroporous structure. Therefore, it is important to study what is the affinity that these macromolecules have with the cations of Zn, Ca, K, Mg and therefore, to know with which of them the affinity is greater depending on the type of carbon studied. The objective of this monographic study is to review the conceptual part of humic acids, their different forms of extraction, and their applications reported by different authors working in this field.

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Zinc adsorption capacity with humic acids extracted from bituminous coal

Vásquez-Osorio

Colpas-Castillo

Castro-Suarez

et al. 2019

IOP Conf. Ser.: Mater. Sci. Eng.

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The contamination of bodies of water by heavy metals represents not only a danger for the environment, but also for human health; because they do not have the capacity to biodegrade, accumulate in the environment and in the tissues of the living organisms that inhabit it. In order to minimize these impacts, Zinc adsorption (Zn) was studied in aqueous solutions using humic acids extracted from bituminous coal from the Cerrejón mine (Guajira). This investigation was divided into two phases: The extraction of Humic Acids and the adsorption study. In the first phase, an aqueous oxidation of coal samples with different particle sizes (125mm, 250mm, and 425mm) was performed, with hydrogen peroxide as the oxidizing agent, at a concentration of 30%. In the second phase Zn2+ removal using Humic Acids extracted from bituminous coals was studied in aqueous media as a function of pH, highest percentage of adsorption obtained was of 66.8% at a pH of 5.

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Aumento del contenido de ácidos húmicos en un carbón de bajo rango a través de la oxidación con aire y con peróxido de hidrogeno o ácido nítrico

Cited by 3 publications

References 14 publications

Physicochemical characterization of bituminous carbons from the Colombian Caribbean region

Physicochemical characterization of bituminous carbons from the Colombian Caribbean region

Extraction of Humic Acids from Different Origins: A Review

Zinc adsorption capacity with humic acids extracted from bituminous coal

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