Novel three-stage kinetic model for aqueous benzene adsorption on activated carbon

Choi, Jae Woo; Choi, Nag-Choul; Lee, Soon Jae; Kim, Dong Ju

doi:10.1016/j.jcis.2007.05.070

Cited by 49 publications

(31 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fahim et al (2006) To quantify the kinetic aspects of biosorption, mathematical modeling has been used in several studies over the years. To obtain as much information as possible about the Ni 2+ and Cr 3+ biosorption kinetics, we modeled the experimental data obtained by using four theoretical models: pseudo-first-order (Lagergren, 1898), pseudo-second-order (Ho and McKay, 1998), three-stage (Choi et al, 2007), and the intra-particle diffusion model (Ruthven, 1984). The pseudo-first-order model is expressed by the differential equation:…”

Section: Mono-component Systemmentioning

confidence: 99%

Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium

Seolatto

Martins

Tavares

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-In this work, the biosorption of Cr 3+ and Ni 2+ by Sargassum filipendula pre-treated with CaCl 2 was studied. Kinetic and equilibrium experiments were carried out for mono-and multi-component solutions in a batch reactor at pH 3.0 and 30 ºC. The results from the kinetic experiments showed that Cr 3+ adsorbs slower than Ni 2+ . This behavior was explained by means of a mechanistic analysis, which showed that Cr 3+ uptake presented three adsorption stages, whereas Ni 2+ adsorption presents only two. The mono-component equilibrium data, along with binary kinetic data obtained from mono-component experiments, showed that, although the kinetics for Cr 3+ removal are slower, the biomass had a stronger affinity for this ion. Almost all Ni 2+ is desorbed from the biomass as Cr 3+ adsorbs. The binary equilibrium data also presented this behavior. The binary data was also modeled by using modified forms of the Langmuir, Jain and Snoeyink, and Langmuir-Freundlich isotherms. However, the prediction obtained presented low accuracy. An alternative modeling with artificial neural networks was presented and the results showed that this technique could be a promising tool to represent binary equilibrium data. The main contribution of this work was to obtain experimental data for Cr 3+ /Ni 2+ adsorption, which is a system rarely found in the literature and that provides information that could be used in process modeling and simulation.

show abstract

Section: Mono-component Systemmentioning

confidence: 99%

Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium

Seolatto

Martins

Tavares

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Atenção especial tem sido dada nas últimas décadas sobre adsorção de compostos orgânicos, como fenóis que são potenciais contaminantes do lençol freático [10][11][12]. Outros poluentes de grande preocupação global são os compostos orgânicos voláteis, como benzeno [13][14][15]. Esses compostos provocam danos à saúde, principalmente devido à toxicidade e/ou mutagenicidade ou carcinogenicidade.…”

Section: +unclassified

Adsorção de fenol e benzeno em montmorilonita modificada com brometo de hexadeciltrimetilamônio

et al. 2014

View full text Add to dashboard Cite

Este estudo avalia a intercalação de esmectita dioctahédrica do Estado Acre com o sal quaternário de amônio brometo de hexadeciltrimetilamônio (HDTMA) em concentrações compreendidas entre 1 a 5 vezes ao valor de CTC da argila original e sua aplicabilidade na adsorção de fenol e benzeno em fase líquida. Os materiais foram caracterizados por microanálises de difração de raios X, microscopia eletrônica de varredura/espectroscopia com dispersão de energia e espectroscopia na região do infravermelho. Os processos de adsorção foram realizados em sistemas simples e as medidas das concentrações do fenol e benzeno foram efetuadas por espectrofotometria na região ultravioleta. Os resultados indicaram que a intercalação da esmectita com HDTMA propiciou cerca de 78,8% de expansão (variação de d001: 1,47 nm para 1,91 nm) e decréscimo acentuado dos elementos das posições interlamelares, como Na, Ca, Mg e K, acompanhado pela delaminação/esfoliação da argila original. Nos processos de adsorção do fenol e benzeno em HDTMA-arg 5 foram obtidos os seguintes resultados: q max= 4,44 e 35,8 mg.g-1; K L= 0,076 e 0,115 L.g-1; ΔGº = -16,85 e -18,38 kJ.mol-1, respectivamente. Estes dados indicaram que os processos de adsorção do benzeno e fenol em fase líquida na organoargila HDTMA-arg 5 foram favoráveis, espontâneos e com interações físicas.

show abstract

“…[66]). It may be avoided by using either a step-wise correction [67][68][69] (which assumes that this process is instantaneous) or better included by using a single exponential term for very fast but not instantaneous processes [29,30,70]:…”

Section: Application To Analysis Of Experimental Datamentioning

confidence: 99%

Extension of Langmuir kinetics in dilute solutions to include lateral interactions according to regular solution theory and the Kiselev association model

Marczewski

2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Novel three-stage kinetic model for aqueous benzene adsorption on activated carbon

Cited by 49 publications

References 10 publications

Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium

Biosorption study of Ni2+ and Cr3+ by Sargassum filipendula: kinetics and equilibrium

Adsorção de fenol e benzeno em montmorilonita modificada com brometo de hexadeciltrimetilamônio

Extension of Langmuir kinetics in dilute solutions to include lateral interactions according to regular solution theory and the Kiselev association model

Contact Info

Product

Resources

About