Kinetic and equilibrium isotherm studies for the adsorptive removal of Brilliant Green dye from aqueous solution by rice husk ash

The efficiency of prepared activated carbon from shea butter seed shells (SB-AC) for the adsorption of formic acid (FA) and acetic acid (AA) from aqueous solution was investigated. The effect of optimization parameters including initial concentration, agitation time, adsorbent dosage and temperature of adsorbate solution on the sorption capacity were studied. The SB-AC was characterized for the following parameters: bulk density, moisture content, ash content, pH, Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The optimal conditions for the adsorption were established and the adsorption data for AA fitted Dubinin-Radushkevich (D-R) isotherm well, whereas FA followed Langmuir isotherm. The kinetic data were examined. It was found that pseudo-second-order kinetic model was found to adequately explain the sorption kinetic of AA and FA from aqueous solution. It was again found that intraparticle diffusion was found to explain the adsorption mechanism. Adsorption thermodynamic parameters were estimated and the negative values of DG showed that the adsorption process was feasible and spontaneous in nature, while the negative values of DH indicate that the adsorption process was exothermic. It is therefore established that SB-AC has good potential for the removal of AA and FA from aqueous solution. Hence, it should find application in the regular treatment of polluted water in aquaculture and fish breeding system.

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“…The thermodynamic results obtained in this study were in agreement with those observed by other researchers (Mane et al 2007;Pan et al 2003).…”

Section: Adsorption Thermodynamicssupporting

confidence: 93%

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Adekola

Oba

2016

Appl Water Sci

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“…Our data revealed that the removal of eosin involves an endothermic process 12 . In general, the removal percentage was improved at higher C i values with increasing the temperature in the range of 30 to 50 o C. It varied from 52 % to 86 % for C i of 800 mg/L, associated with an increase in removal capacity from 52 mg/g to 68 mg/g at 50 o C, The improvement of removal capacity was related to an increase in the mobility of the eosin ions 13 .…”

Section: Effect Of Temperaturementioning

confidence: 86%

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Al-Faze¹,

Kooli²

2014

Orient. J. Chem.

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Local clay from Al-Madinah Al-Munawwarah was modified by a solution of cetyltrimethylammonium bromide (C16TMABr) at different initial concentrations. The organoclays were characterized by PXRD, TGA, FTIR and N 2 adsorption isotherms. The ability of these samples to remove the dye eosin is evaluated. The removal properties of organoclays were dependent on the content of C16TMA cations, the initial concentrations of eosin, temperature of the removal process, the mass of the used organoclays. These organoclays exhibited removal percentages in the range of 80 ~100% and removed amounts of 50 ~ 68 mg of eosin/ g. The isotherms were fitted well in Langmuir model.

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“…The values were found to be between 0.048 Journal of Nanomaterials Table 4, respectively. Being smaller than 1, 1/ value indicates the convenience of the adsorbents for the dye removal [37]. The consistency of Freundlich isotherm for MNP proves that the surface of the adsorbent consists of small, heterogeneous pores that resemble each other [38].…”

Section: Adsorption Isotherms Langmuir and Freundlich Isotherm Plotsmentioning

confidence: 87%

Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash

Kaykıoğlu

Güneş

2016

Journal of Nanomaterials

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The removal of Acid Red 114 (AR114) dye by adsorption process, using the magnetic nanoparticle (RHA-MNP) which is produced from rice husk ash burned at 300 ∘ C and the magnetic nanoparticle (MNP, Fe 3 O 4 ), was studied. Batch processes were used under different test parameters: pH (2, 4, 6, and 10) and without pH, initial dye concentration (20,40, 60, 80, and 100 mg/L), and contact time (0, 1, 5, 10, 15, 30, 45, 60, 90, and 150 min). Optimum conditions for AR114 removal were found to be at natural pH (pH without correction) for both adsorbents. Freundlich isotherm was found to be more consistent for MNP and Langmuir isotherm was found to be more consistent for RHA-MNP. The maximum adsorption capacities of MNP and RHA-MNP adsorbents for AR114 dye were equal to 111 mg/g. The kinetic experimental data fitted the pseudo-second-order model for both MNP and RHA-MNP. It can be concluded that RHA-MNP which is a waste could be used as low-cost adsorbent to remove AR114 from aqueous solution.

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Kinetic and equilibrium isotherm studies for the adsorptive removal of Brilliant Green dye from aqueous solution by rice husk ash

Cited by 448 publications

References 34 publications

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash

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Kinetic and equilibrium isotherm studies for the adsorptive removal of Brilliant Green dye from aqueous solution by rice husk ash

Cited by 448 publications

References 34 publications

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Biosorption of formic and acetic acids from aqueous solution using activated carbon from shea butter seed shells

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Comparison of Acid Red 114 Dye Adsorption by Fe3O4and Fe3O4Impregnated Rice Husk Ash

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Product

Resources

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Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄and Fe₃O₄Impregnated Rice Husk Ash