2013
DOI: 10.31910/rudca.v16.n1.2013.882
|View full text |Cite
|
Sign up to set email alerts
|

Equilibrio de adsorción del colorante azul de metileno sobre carbón activado

Abstract: Synthetic dyes are an important class of organic compounds, which unfortunately are agents affecting the ecology, often found in the environment as a result of their widespread industrial use. The disposal of these dyes into water resources should be avoided, therefore different treatment techniques are used, being adsorption one of the most employed. This paper presents a study on the adsorption of methylene blue dye (MB) in aqueous solution on granular activated carbon (GAC) at 25°C. Batch experiments were c… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

0
2
0
7

Year Published

2016
2016
2020
2020

Publication Types

Select...
4
1

Relationship

0
5

Authors

Journals

citations
Cited by 10 publications
(9 citation statements)
references
References 20 publications
0
2
0
7
Order By: Relevance
“…The production of phenolic compounds is an indicator of defense against the mechanical damage involved in the healing process. The addition of methylene blue showed no effect on the content of soluble phenols; however, changes were observed in the content of call wall-linked phenols at the highest concentration evaluated, probably because some dyes have a toxic effect on plant tissues [35], due to the formation of chelates that produce toxicity [36]. On the other hand, when L-cysteine was added, an effect on the content of phenolic compounds was observed.…”
Section: Soluble Phenols and Cell Wall-linked Phenolsmentioning
confidence: 84%
“…The production of phenolic compounds is an indicator of defense against the mechanical damage involved in the healing process. The addition of methylene blue showed no effect on the content of soluble phenols; however, changes were observed in the content of call wall-linked phenols at the highest concentration evaluated, probably because some dyes have a toxic effect on plant tissues [35], due to the formation of chelates that produce toxicity [36]. On the other hand, when L-cysteine was added, an effect on the content of phenolic compounds was observed.…”
Section: Soluble Phenols and Cell Wall-linked Phenolsmentioning
confidence: 84%
“…∆G°=-RT lnK L [5] El cambio en la energía de Gibbs indica el grado de espontaneidad del proceso, valores negativos reflejan una mayor favorabilidad de la adsorción y su variación puede expresarse en función del cambio en la entalpia ΔH°(kJ/mol), en la entropía ΔS°(J/molK) y la temperatura, como lo indica la ecuación 6.…”
Section: Resultsunclassified
“…Las industrias como la textil, cuero, imprenta, cosmética, productos farmacéuticos, plásticos y alimentos utilizan diferentes tipos de colorantes que también aparecen en las aguas residuales descargadas por algunas de estas industrias (1)(2)(3). La presencia de color en los cuerpos de agua incide sobre la diversidad acuática porque impide la penetración de la luz solar afectando la fotosíntesis considerablemente (1,4), además, se conoce que estos compuestos contienen aminas aromáticas, bencidina y otros compuestos aromáticos tóxicos, carcinógenos y mutagénicos para los seres humanos (3,5,6).…”
Section: Introductionunclassified
“…Además, los tiempos de remoción son bastante cortos, como se observa, la cantidad de azul de metileno removido incrementa rápidamente en los primeros diez minutos obteniendo porcentajes de remoción superiores al 95% lo cual concuerda con la literatura [34]. El aumento rápido en los primeros minutos puede deberse a una primera adsorción en la superficie y la segunda parte, que suele ser más lenta, puede atribuirse a mecanismos a nivel de poros; comportamientos similares fueron indicados por [35]. Los datos de capacidad de adsorción y concentraciones medidas a distintos tiempos fueron ajustados a los modelos cinéticos de pseudo primer y segundo orden.…”
Section: Tiempo (H)unclassified