A Study of the Adsorption of Aromatic Compounds Using Activated Carbons Prepared from Chestnut Shell

Paredes-Doig, Ana Lucía; Kou, María del Rosario Sun; Picasso, Gino; Cannata, José Lazo

doi:10.1260/0263-6174.32.2-3.165

Cited by 7 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When the LUMO from metal ion is closer to the E f of the AC, there is an increase in the amount of net charge on the adsorbate (metal ion) contributed by AC. The net charge strongly suggests that empty orbitals on metal ions overlap with filled orbitals localized on AC, and the charge transfer from AC to the metal ions increases the strength of adsorption (Paredes-Doig et al., 2014; Rochefort and Wuest, 2009).…”

Section: Resultsmentioning

confidence: 99%

The interaction of metallic ions onto activated carbon surface using computational chemistry software

Paredes-Doig

Pinedo

Aylas-Orejón

et al. 2020

Adsorption Science & Technology

View full text Add to dashboard Cite

Activated carbon was prepared from the seeds of aguaje palm ( Mauritia flexuosa L.f.) by a chemical activation with phosphoric acid. This activated carbon was used for adsorbing metal ions: Pb(II), Cd(II), and Cr(III). To understand the mechanism of adsorption of these heavy metals (Cr, Cd, and Pb), the activated carbon surface was oxidized with nitric acid (1 M) increasing the oxygenated surface groups showing an increasing in their adsorption capacities of these metals. The oxidized activated carbon slightly increased the maximum adsorption capacity to 5–7%. The order of adsorption for unoxidized and oxidized activated carbons was Pb> Cd> Cr. This experimental information was corroborated by molecular modeling program Hyperchem 8 based adsorption mainly on two factors: the electron density and orbitals—highest occupied molecular orbital and lowest unoccupied molecular orbital.Activated carbons were characterized by adsorption/desorption of N2, obtaining an increase of microporous surface area for oxidized activated carbon. An increase of surface acidity and a reduction of isoelectric points were observed in oxidized activated carbon. According to these results, the adsorption of metal ions is favored in contact with an oxidized activated carbon, which has more amount of phenolic and carboxylic functional groups. Similarly, decreasing the isoelectric point indicates that the surface has a higher negative charge. The surface information was corroborated by Hyperchem, which indicates that the surface of the oxidized activated carbon has a higher electron density, indicating a larger amount of electrons on its surface, which means the surface of oxidized activated carbon charges negatively and thereby attracts metal ions.

show abstract

Section: Resultsmentioning

confidence: 99%

The interaction of metallic ions onto activated carbon surface using computational chemistry software

Paredes-Doig

Pinedo

Aylas-Orejón

et al. 2020

Adsorption Science & Technology

View full text Add to dashboard Cite

show abstract

“…In Figure 3(a), one can observe that the malt bagasse has a rough surface, with ordered layers that show the fibrous nature of the material. This morphology favors the adherence of species, such as compounds and ions, to the irregular surface of the biomass (Boniolo et al., 2010; Paredes-Doig et al., 2014). Figure 3(b) shows the filling of the surface with the YR-B2R dye after biosorption.…”

Section: Resultsmentioning

confidence: 99%

Biosorption of reactive yellow dye by malt bagasse

Silva

Zanutto

Pietrobelli

2019

Adsorption Science & Technology

View full text Add to dashboard Cite

This research evaluated the biosorption potential of the 134% Yellow Reafix BR2 dye by the malt bagasse. Tests were conducted at batch conditions, under controlled agitation, pH, and temperature. The biosorbent was characterized through scanning electron microscopy and Fourier transform infrared spectroscopy, before and after biosorption. Malt bagasse presented a point of zero charge at 6.75. In the process variables evaluation, there was a greater biosorption potential in acidic pH, without a significant influence of size on the biosorbent particles. The equilibrium time was achieved in 360 min, with approximately 93% removal at the evaluated temperatures. The experimental data were best represented by the pseudo-second-order model. Biosorption was characterized as spontaneous and endothermic, with indicative of physical. Considering the equilibrium, the Langmuir isotherm was the one that best fit the experimental data, with a maximum biosorption capacity of 68.75 mg g-1 (at 303 K and pH 2). The removal suffered no significant interference with the presence of another dye nor with the increase of ionic strength. Thus, the malt bagasse shows potential to be used as a biosorbent in treatment systems of industrial effluents.

show abstract

“…El Análisis proximal muestra que el epispermo de la semilla de lúcuma tiene un porcentaje de humedad bastante bajo en comparación con otras materias precursoras 5.54 %±0.06 (cáscara de coco 7.9 %, semilla de aguaje 8.4 %, hueso de aceituna 12.9 %)11,12. A mayor porcentaje de humedad mayor tiempo de carbonización de la materia prima y por lo tanto mayor consumo energético (Paredes-Doig et al, 2014;Sánchez, 2018;Vaccari, 2015). El porcentaje de material volátil presenta un valor de 70,96 %±0.15, el cual está por debajo de los otros materiales precursores como la cáscara de coco 72.5 %, semilla de aguaje 81.1 %, hueso de aceituna 80.9 % (Marsh y Rodriguez, 2006;Obregón, 2012).…”

Section: Análisis Proximalunclassified

“…El porcentaje de material volátil presenta un valor de 70,96 %±0.15, el cual está por debajo de los otros materiales precursores como la cáscara de coco 72.5 %, semilla de aguaje 81.1 %, hueso de aceituna 80.9 % (Marsh y Rodriguez, 2006;Obregón, 2012). A mayor cantidad de material volátil menor será la capacidad de adsorción debido a estos se alojan en los poros del carbón vegetal como material alquitranado (Paredes-Doig et al, 2014;Sánchez, 2018;Vaccari, 2015). No obstante, los agentes activantes como el 𝐻 3 𝑃𝑂 4 oxidan y eliminan el material alquitranado permitiendo el desarrollo de la porosidad durante la activación (Marsh y Rodriguez, 2006).…”

Section: Análisis Proximalunclassified

“…No obstante, los agentes activantes como el 𝐻 3 𝑃𝑂 4 oxidan y eliminan el material alquitranado permitiendo el desarrollo de la porosidad durante la activación (Marsh y Rodriguez, 2006). Por otro lado, el epispermo de lúcuma presenta un valor muy bajo de cenizas (0.16 %±0.04), siendo beneficioso debido a que las cenizas no aportan a la capacidad adsortiva e incluso podría interferir en el proceso (Paredes-Doig et al, 2014). El porcentaje carbono fijo del epispermo de lúcuma es de 23,34 %±0,02 superando a otras materias precursoras tal como la cáscara de coco 18.5%, la semilla de aguaje 7.5 % y el hueso de aceituna 5.4 % (Marsh y Rodriguez, 2006;Obregón, 2012).…”

Section: Análisis Proximalunclassified

See 1 more Smart Citation

Uso Del Epispermo De Semilla De Lúcuma Como Carbón Activado

Ramos

Ascarza²

2022

An. cient. U.N.A.

View full text Add to dashboard Cite

La generación de residuos es uno de los principales problemas que enfrenta la agroindustria debido a su inadecuado manejo. Por lo tanto, es vital buscar alternativas de aprovechamiento que generen valor agregado. El objetivo de la investigación fue determinar la competencia del epispermo de la semilla de lúcuma (ESL) en la elaboración de carbón activado (CA). Se usó como agente activante a dos razones de impregnación (0.2 y 0.4g /g epispermo), a tres temperaturas (600, 700 y 800 °C) y tres tiempos (15, 30 y 45min) de carbonización. Se obtuvieron 18 tratamientos. El colorante azul de metileno (AM) se usó como adsorbato. Se estudió la cinética química, capacidad de adsorción e isotermas de adsorción del sistema AM-CA. Se determinó del área superficial de adsorción mediante la isoterma BET con nitrógeno gaseoso, se caracterizó los grupos funcionales y la morfología del CA mediante espectroscopía infrarroja y microscopía de barrido electrónico, respectivamente. Los resultados muestran una cinética de pseudo segundo orden, mientras que el comportamiento de la adsorción corresponde a una isoterma sigmoidal la cual se ajusta al modelo de isoterma Frumking-Fowler-Guggenheim (FFG). El tratamiento que presentó el mayor porcentaje de adsorción (94.5 %) fue CA0.4_600°C30’, obteniendo un área superficial de 648 m²/g de CA. Se concluye que el ESL es apto para su aprovechamiento como carbón activado.

show abstract

A Study of the Adsorption of Aromatic Compounds Using Activated Carbons Prepared from Chestnut Shell

Cited by 7 publications

References 25 publications

The interaction of metallic ions onto activated carbon surface using computational chemistry software

The interaction of metallic ions onto activated carbon surface using computational chemistry software

Biosorption of reactive yellow dye by malt bagasse

Uso Del Epispermo De Semilla De Lúcuma Como Carbón Activado

Contact Info

Product

Resources

About