Sorption of malachite green by a novel sorbent, dead leaves of plane tree: Equilibrium and kinetic modeling

Hamdaoui, Oualid; Saoudi, Fethi; Chiha, Mahdi; Naffrechoux, Emmanuel

doi:10.1016/j.cej.2007.12.018

Cited by 117 publications

(69 citation statements)

References 21 publications

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“…It is also observed that D p decreases as the temperature increases from 15 to 40°C. The D p values (Table 4) are within the magnitudes reported in the literature (Hamdaoui et al 2008), and confirm that the intra-particle diffusion is not the only ratecontrolling step.…”

Section: Intra-particle Diffusionsupporting

confidence: 76%

“…Based on the equilibrium biosorption, the pseudo-secondorder kinetic equation is expressed by the relation (Hamdaoui et al 2008):…”

Section: Pseudo-second-order Modelmentioning

confidence: 99%

“…Thus, a correlation of the equilibrium data by either theoretical or empirical equations is essential for the practical operations to optimize the design of the biosorption system; so it is important to establish the most appropriate correlation for the equilibrium curves. The isotherm data are analyzed using the commonly used equilibrium models, namely the Langmuir and Freundlich ones (Hamdaoui et al 2008;Akar et al 2009;Al-Qodah et al 2007). The mathematical expressions are, respectively, given by…”

Section: Batch Isotherm Studiesmentioning

confidence: 99%

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Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

et al. 2017

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This study explores the feasibility of pre-treated coffee waste (PCW) as biosorbent for the removal of diazinon. The effect of the pesticide concentration (6-20 mg), solution pH (3-11.5), temperature (15-40°C) and co-existing inorganic ions (H 2 PO 4 -, NO 3 -) on the diazinon biosorption over PCW is investigated. The experimental results indicate an optimal pH of 7.3 for the diazinon elimination on PCW (1 g L -1 ). The Langmuir model describes well the isotherm data with a high regression coefficient (R 2 [ 0.990) and a maximum monolayer biosorption capacity of 18.52 mg g -1 at 15°C. It is also observed that the intra-particle diffusion is not the rate-controlling step. A comparison is evaluated between the pseudo-second-order and intra-particle diffusion kinetic models; the experimental data are well fitted by the pseudosecond-order kinetic model. The biosorption capacity decreases with increasing temperature for a diazinon concentration of 10 mg L -1 . The negative enthalpy DH°( -63.57 kJ/mol) indicates that the diazinon biosorption onto PCW is exothermic. Under optimal conditions, the biosorption reaches 95% after 90 min. The removal efficiency decreases from 95 to 65.67 and 48.9% for the diazinon alone and in the presence of NO 3 -and H 2 PO 4 -(100 mg L -1 ), respectively.

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Section: Intra-particle Diffusionsupporting

confidence: 76%

“…Based on the equilibrium biosorption, the pseudo-secondorder kinetic equation is expressed by the relation (Hamdaoui et al 2008):…”

Section: Pseudo-second-order Modelmentioning

confidence: 99%

Section: Batch Isotherm Studiesmentioning

confidence: 99%

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Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

et al. 2017

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“…There are several adsorbents that are won't to take away MG from waste matter like, lotus seed [28], durian seed based [29], weed [30], wood [31], marine protects [32] sugar canemud [33], dead leaves [34], and rice husk [35].…”

Section: Introductionmentioning

confidence: 99%

Technique of Batch Adsorption for the Elimination of (Malachite Green) Dye from Industrial Waste Water by Exploitation Walnut Shells as Sorbent

2017

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“…The discharge of dyes and pigments from various industries has generated large quantities of colored wastewater, which pose a potential threat to the environment [1][2][3][4]. Malachite green (MG) (shown in Figure 1) is a cationic dye belonging to the triphenylmethane dye category, which is widely used for dyeing of textile, leather and paper, printing, and treating parasites, fungal and bacterial infections in fish and fish eggs [5].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Malachite Green Removal from Aqueous Solutions by Nanoscale Zerovalent Zinc Using Artificial Neural Network

Ruan

Shi

et al. 2017

Applied Sciences

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Abstract:The commercially available nanoscale zerovalent zinc (nZVZ) was used as an adsorbent for the removal of malachite green (MG) from aqueous solutions. This material was characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The advanced experimental design tools were adopted to study the effect of process parameters (viz. initial pH, temperature, contact time and initial concentration) and to reduce number of trials and cost. Response surface methodology and rapidly developing artificial intelligence technologies, i.e., artificial neural network coupled with particle swarm optimization (ANN-PSO) and artificial neural network coupled with genetic algorithm (ANN-GA) were employed for predicting the optimum process variables and obtaining the maximum removal efficiency of MG. The results showed that the removal efficiency predicted by ANN-GA (94.12%) was compatible with the experimental value (90.72%). Furthermore, the Langmuir isotherm was found to be the best model to describe the adsorption of MG onto nZVZ, while the maximum adsorption capacity was calculated to be 1000.00 mg/g. The kinetics for adsorption of MG onto nZVZ was found to follow the pseudo-second-order kinetic model. Thermodynamic parameters (∆G 0 , ∆H 0 and ∆S 0 ) were calculated from the Van't Hoff plot of lnKc vs. 1/T in order to discuss the removal mechanism of MG.

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Sorption of malachite green by a novel sorbent, dead leaves of plane tree: Equilibrium and kinetic modeling

Cited by 117 publications

References 21 publications

Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

Biosorption of diazinon by a pre-treated alimentary industrial waste: equilibrium and kinetic modeling

Technique of Batch Adsorption for the Elimination of (Malachite Green) Dye from Industrial Waste Water by Exploitation Walnut Shells as Sorbent

Modeling of Malachite Green Removal from Aqueous Solutions by Nanoscale Zerovalent Zinc Using Artificial Neural Network

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