Adsorption of Congo Red by Ni/Al-CO3: Equilibrium, Thermodynamic and Kinetic Studies

Ayawei, Nimibofa; Ekubo, Allen T.; Wankasi, Donbebe; Dikio, Ezekiel Dixon

doi:10.13005/ojc/310307

Cited by 135 publications

(57 citation statements)

References 13 publications

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“…Similarly, Song et al applied the Halsey isotherm for the study of coconut shell carbon prepared by KOH activation for the removal of pb 2 + ions from aqueous solutions. The Halsey isotherm fits the experimental data well due to high correlation coefficient ( 2 ), which may be attributed to the heterogeneous distribution of activate sites and multilayer adsorption on coconut shell carbons [16].…”

Section: Halsey Isothermmentioning

confidence: 72%

“…This isotherm gives an expression which defines the surface heterogeneity and the exponential distribution of active sites and their energies [16].…”

Section: Freundlich Isothermmentioning

confidence: 99%

“…Ayawei et al and Vijayaraghavan et al applied the Dubinin-Radushkevich isotherm in their investigation of Congo red adsorption behavior on Ni/Al-CO 3 and sorption behavior of cadmium on nanozero-valent iron particles, respectively [16,22].…”

Section: Dubinin-radushkevichmentioning

confidence: 99%

“…The Halsey isotherm is used to evaluate multilayer adsorption at a relatively large distance from the surface [16]. The adsorption isotherm can be given as follows [31]:…”

Section: Halsey Isothermmentioning

confidence: 99%

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Modelling and Interpretation of Adsorption Isotherms

Ayawei

Ebelegi

Wankasi

2017

Journal of Chemistry

1,955

885

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The need to design low-cost adsorbents for the detoxification of industrial effluents has been a growing concern for most environmental researchers. So modelling of experimental data from adsorption processes is a very important means of predicting the mechanisms of various adsorption systems. Therefore, this paper presents an overall review of the applications of adsorption isotherms, the use of linear regression analysis, nonlinear regression analysis, and error functions for optimum adsorption data analysis.

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Section: Halsey Isothermmentioning

confidence: 72%

“…This isotherm gives an expression which defines the surface heterogeneity and the exponential distribution of active sites and their energies [16].…”

Section: Freundlich Isothermmentioning

confidence: 99%

Section: Dubinin-radushkevichmentioning

confidence: 99%

“…The Halsey isotherm is used to evaluate multilayer adsorption at a relatively large distance from the surface [16]. The adsorption isotherm can be given as follows [31]:…”

Section: Halsey Isothermmentioning

confidence: 99%

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Modelling and Interpretation of Adsorption Isotherms

Ayawei

Ebelegi

Wankasi

2017

Journal of Chemistry

1,955

885

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show abstract

“…Adsorption curves are single, smooth, and continuous leading to saturation and indicate the possible monolayer coverage 26,27 on the surface of adsorbents by Cr(VI). Due to the rapid adsorption of all available sites and a relatively small amount of adsorbent used, removal efficiency of Cr(VI) decreased, an increase in the amount of adsorbent may therefore reverse adsorption trend 28 . The percentage removal of Cr(VI) remarkably increases at an increasing dose until 3 g possibly explained by the increase in the surface area for the metal to bind with the available additional sorption sites 26,28,29 .…”

Section: Kinetic Profilementioning

confidence: 99%

Batch Adsorption Study and Kinetic Profile of Cr(VI) Using Lumbang (Aleurites moluccana)-Derived Activated Carbon-Chitosan Composite Crosslinked With Epichlorohydrin

Villarante¹,

Bautista²,

Sumalapao³

2017

Orient. J. Chem

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Batch adsorption of toxic Cr(VI) ion from an aqueous solution using lumbang (Aleurites moluccana) activated carbon-chitosan composite crosslinked with epichlorohydrin as an adsorbent was investigated. The adsorption experiments were performed at varying pH, agitation time, initial Cr(VI) ion concentration, temperature, and adsorbent dose. At an initial concentration of 60 ppm Cr(VI), the maximum adsorption was observed at pH 3, adsorbent dose of 3 g/L, contact time of 75 min, and temperature of 30 o C. Analysis of the experimental data using different kinetic models revealed that the biosorption phenomenon behaved under a pseudo second-order rate mechanism.

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Effects of conservation buffer systems on adsorption of fluorescent‐labeled Escherichia coli

et al. 2023

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The magnitude of bacterial transport through runoff into surface water or infiltration into groundwater is influenced by the adsorption processes in soil. The objective of this study was to evaluate fluorescent-labeled Escherichia coli (E. coli) adsorption by soil under agroforestry buffer (AB), grass buffer (GB), and row crop (RC) management. Adsorption experiments were conducted by inoculating three masses (0.5, 1, and 10 g) of each treatment (AB, GB, and RC) with E. coli O157:H7-GFP with concentration ranges of 10 5 -10 8 colony-forming units (cfu) ml −1 . Adsorption data were evaluated using Langmuir, Freundlich, and Temkin adsorption isotherm models. The Freundlich isotherm model described the observed data well for all treatments using the 10-g soil mass, with the R 2 values closer to unity in all treatments. The Freundlich K f parameter, an indicator of adsorption capacity, was higher for the AB treatment (9.93 cfu ml −1 ) compared with the GB and RC treatments (2.32 and 1.27 cfu ml −1 , respectively). The multiple pairwise comparisons test (Tukey test) of the Freundlich 1/n f parameter demonstrated a significant difference (p < .05) between the AB treatment and the RC and GB treatments. Similarly, the K f values were significantly (p = .05) higher for the 10-g mass under the same test conditions, but no significant differences were observed in the 0.5-and 1-g masses. This study demonstrated that AB has a higher E. coli adsorption capacity and the potential for mitigating the effects of E. coli O157:H7 transport to surface or groundwater through the soil ecosystem.

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Adsorption of Congo Red by Ni/Al-CO3: Equilibrium, Thermodynamic and Kinetic Studies

Cited by 135 publications

References 13 publications

Modelling and Interpretation of Adsorption Isotherms

Modelling and Interpretation of Adsorption Isotherms

Batch Adsorption Study and Kinetic Profile of Cr(VI) Using Lumbang (Aleurites moluccana)-Derived Activated Carbon-Chitosan Composite Crosslinked With Epichlorohydrin

Effects of conservation buffer systems on adsorption of fluorescent‐labeled Escherichia coli

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