Application of carbon adsorbents prepared from Brazilian-pine fruit shell for the removal of reactive orange 16 from aqueous solution: Kinetic, equilibrium, and thermodynamic studies

Calvete, Tatiana; Lima, Éder C.; Cardoso, Natali F.; Vaghetti, Júlio C.P.; Dias, Susana Oliveira; Pavan, Flávio André

doi:10.1016/j.jenvman.2010.03.013

Cited by 156 publications

(115 citation statements)

References 59 publications

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“…Overall, it is advantageous for an adsorbent for anionic dye adsorption that the pH of the solution is < pHpzc. Conversely, it is conducive for an adsorbent for cationic dye adsorption that the pH of the solution is > pHpzc (Calvete et al 2010).…”

Section: Effect Of Phmentioning

confidence: 99%

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Li¹,

Lijuan²

2014

BioResources

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Microcrystalline cellulose (MCC) was functionalized with quaternary amine groups for use as an adsorbent to remove Congo Red dye (CR) from aqueous solution. The ultrasonic pretreatment of MCC was investigated during its functionalization. Characterization was conducted using infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The batch adsorption of the functionalized MCC was studied to evaluate the effects of dye concentration, pH of solution, temperature, and NaCl concentration on the adsorption CR. The adsorbent (FM-1) obtained using ultrasonic pretreatment of MCC under 10.8 kJ•g -1 exhibited an adsorption capacity of 304 mg•g -1 at initial pH under a dose of 0.1 g•L -1 and initial concentration of 80 mg•L -1 . After functionalization, the FT-IR and XPS results indicated that the quaternary amine group was successfully grafted onto the cellulose, the surface was transformed to be coarse and porous, and the crystalline structure of the original cellulose was disrupted. FM-1 has been shown to be a promising and efficient adsorbent for the removal of CR from an aqueous solution.

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Section: Effect Of Phmentioning

confidence: 99%

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Li¹,

Lijuan²

2014

BioResources

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“…17 and linearized Langmuir-1, Langmuir-2, Langmuir-3, and Langmuir-4 were compared. Table 3.5 presents the relative differences of the parameters of the isotherm plots depicted on Considering that K L values are very important equilibrium parameters for estimating equilibrium constants (determination of thermodynamic parameters) [10,[23][24][25][26], the use of Langmuir-1 linearized isotherms could lead to erroneous estimation of Gibb's free energy change (ΔG°), enthalpy change (ΔH°), and entropy change (ΔS°) of adsorption.…”

Section: Equilibrium Isothermsmentioning

confidence: 99%

Kinetic and Equilibrium Models of Adsorption

Lima

Adebayo

Machado

2015

Carbon Nanostructures

252

144

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In adsorption study, isotherms and kinetics of adsorption process provide pieces of information underlying the mechanisms and dynamics of the process. Several equilibrium and kinetic models are usually employed for performing the experimental design of an adsorption system. In this chapter, the Langmuir, Freundlich, Sips, Liu, Redlich-Peterson nonlinear equations, as well as other unusual isotherm models (Hill, Khan, Radke-Prausnitz, Toth) are discussed. For the kinetics of adsorption, the pseudofirst-order, pseudo-second-order, general-order, Avrami fractionary order, and Elovich chemisorption models are explained. The importance of statistical parameters such as coefficient of determination (R 2 ), adjusted coefficient of determination (R 2 adj ), and standard deviation (root of mean square error) are highlighted. The usage of linearized and nonlinearized equations are illustrated and explained. Some common mistakes commonly committed in the literature using linearized equilibrium and kinetic adsorption models as well as other polemic points in adsorption research are pointed out. Analytical techniques together with thermodynamical data of enthalpy and entropy changes are needed to ascertain if an adsorption process is a chemical or a physical process.

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“…The effect of adsorbent dosage, contact time and pH were studied in a range of (0.2-2 g), (10-240 min) and (2-11), respectively. The pH of dye solution was regulated by NaOH and H 2 SO 4 . The experiments in a batch system were carried out in a 250 ml Erlenmeyer flask.…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

“…The textile industries are known as significant dye consumer and major colorful wastewater producer (3). The dyes are defined as organic molecules with complex aromatic structure (4,5). Owing to their properties, the dyes can create an esthetic issues and many risks to public health (6,7).…”

Section: Introductionmentioning

confidence: 99%

Application of AzollaFiliculoides Biomass in Acid Black 1 Dye Adsorption from Aqueous Solution

et al. 2014

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Background and purpose: The textile dyes are considered as important pollutants due to the toxicity on human and environment. Therefore, the dye removal from industrial effluents is necessary. This study evaluates the ability of Azolla for the adsorption of acid black 1 (AB1) dye from aqueous solution. Materials and Methods:This was an experimental-laboratory study. The Azolla biomass was sun dried, crushed and sieved to particle sizes in the range of 1-2 mm. Then, it treated with 0.1 M HCl for 5 h, followed by washing with distilled water, and it used as an adsorbent. The effect of study parameter was investigated, and the residues AB1 concentration was measured by DR2800 spectrophotometer at in λ max = 622 nm. Results:The results indicated that the efficiency of AB1 adsorption decreased with increased initial dye concentration. It increased with increased contact time and adsorbent. The highest adsorption efficiency was occurred at pH = 2. The equilibrium data were the best fitted on Langmuir isotherm and pseudo-second-order kinetic model. Conclusion:The Azolla could present high ability in dye removal. Therefore, it can be used as inexpensive and effective adsorbent in textile effluent treatment.

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Application of carbon adsorbents prepared from Brazilian-pine fruit shell for the removal of reactive orange 16 from aqueous solution: Kinetic, equilibrium, and thermodynamic studies

Cited by 156 publications

References 59 publications

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Kinetic and Equilibrium Models of Adsorption

Application of AzollaFiliculoides Biomass in Acid Black 1 Dye Adsorption from Aqueous Solution

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