Application of Aqai Stalks as Biosorbents for the Removal of the Dye Procion Blue MX-R from Aqueous Solution

Alencar, Wagner S.; Lima, Éder C.; Royer, Betina; Santos, Bruna dos; Calvete, Tatiana; Silva, Edson Antônio da; Alves, Cláudio Nahum

doi:10.1080/01496395.2011.616568

Cited by 88 publications

(81 citation statements)

References 54 publications

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“…where k N is the rate constant, q e is the amount of adsorbate adsorbed by adsorbent at equilibrium, q t is the amount of adsorbate adsorbed by adsorbent at a given time, t, and n is the order of adsorption with respect to the effective concentration of the adsorption active sites present on the surface of adsorbent [8]. Application of universal rate law to adsorption process led to Eq.…”

Section: Kinetic Models Based On the Order Of Reactionmentioning

confidence: 99%

“…Theoretically, the exponent n in Eq. 3.12 can be an integer or noninteger rational number [8,12,14].…”

Section: Kinetic Models Based On the Order Of Reactionmentioning

confidence: 99%

“…Many kinetic models were developed in order to find intrinsic kinetic adsorption constants. In this chapter we will discuss the adsorption kinetic models based on the chemical reaction (pseudo-first order equation [6], pseudo-secondorder equation [7], general-order equation [8]), and the empiric models (Avrami fractionary model [9], and Elovich chemisorption model [9]). …”

Section: Introductionmentioning

confidence: 99%

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Kinetic and Equilibrium Models of Adsorption

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2015

Carbon Nanostructures

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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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Section: Kinetic Models Based On the Order Of Reactionmentioning

confidence: 99%

“…Theoretically, the exponent n in Eq. 3.12 can be an integer or noninteger rational number [8,12,14].…”

Section: Kinetic Models Based On the Order Of Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetic and Equilibrium Models of Adsorption

Lima

Adebayo

Machado

2015

Carbon Nanostructures

268

144

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“…It has been observed different isotherm models gave different adsorption equilibrium constants (K) [14,19,[23][24][25][26][27] . Thermodynamic parameters of adsorption can be evaluated from the K g (Liu equilibrium constant), as already reported 14,19,27 .…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

“…One of the most important factors in adsorption studies is the effect of acidity of the medium 23 . Different species may show divergent ranges of suitable pH depending on the type of adsorbent used.…”

Section: Effects Of Ph On Adsorptionmentioning

confidence: 99%

Adsorption of a textile dye from aqueous solutions by carbon nanotubes

et al. 2013

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Multi-walled and single-walled carbon nanotubes were used as adsorbents for the removal of Reactive Blue 4 textile dye from aqueous solutions. The adsorbents were characterised using Raman spectroscopy, N 2 adsorption/desorption isotherms and scanning and transmission electron microscopy. The effects of pH, agitation time and temperature on adsorption capacity were studied. In the acidic pH region, the adsorption of the dye was favourable using both adsorbents. The contact time to obtain equilibrium isotherms at 298-323 K was fixed at 4 hours for both adsorbents. For Reactive Blue 4 dye, Liu isotherm model gave the best fit for the equilibrium data. The maximum sorption capacity for adsorption of the dye occurred at 323 K, attaining values of 502.5 and 567.7 mg g -1 for MWCNT and SWCNT, respectively.

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Comparison of a Homemade Bacuri Shell Activated Carbon With Carbon Nanotubes for Food Dye Removal

Saucier

Adebayo

Lima

et al. 2015

CLEAN Soil Air Water

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The shell of bacuri together with inorganic components [red mud þ lime þ KOH þ KAl(SO 4 ) 2 þ Al(OH) 3 ] at different ratios of 1.0 (BC-1.0), 1.5 (BC-1.5), and 2.0 (BC-2.0) were pyrolized at 1073 K. To complete the chemical activation process, the inorganic components were leached from the carbonaceous matrix through acidification with 6 M HCl under reflux to obtain ABC-1.0, ABC-1.5 and ABC-2.0. ABC-1.5 showed the highest adsorption capacity among these adsorbents. Fourier transform IR spectroscopy, scanning electron microscopy, N 2 adsorption/desorption curves and X-ray diffraction were used to characterize BC-1.5 (precursor) and ABC-1.5 (activated carbon). The analyses indicate that the majority of the inorganic compounds were leached from the carbonaceous matrix, resulting in an activated carbon with a high surface area and pore volume, suitable for dye adsorption. The sorption capacity of ABC-1.5 was compared with multi-walled carbon nanotubes (MWCNT) for removal of Brilliant Blue food dye (BB-FCF) from aqueous solutions. The general order kinetic model described well the adsorption process. The maximum amounts of BB-FCF removed at 323 K were 647.9 and 231.5 mg g À1 for ABC-1.5 and MWCNT, respectively. In addition, ABC-1.5 and MWCNT were applied for the treatment of two simulated effluents.

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Application of Aqai Stalks as Biosorbents for the Removal of the Dye Procion Blue MX-R from Aqueous Solution

Cited by 88 publications

References 54 publications

Kinetic and Equilibrium Models of Adsorption

Kinetic and Equilibrium Models of Adsorption

Adsorption of a textile dye from aqueous solutions by carbon nanotubes

Comparison of a Homemade Bacuri Shell Activated Carbon With Carbon Nanotubes for Food Dye Removal

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