Removal of Congo Red from Aqueous Solution Using Magnetic Chitosan Composite Microparticles

Yan, Tao; Lijuan, Wang

doi:10.15376/biores.8.4.6026-6043

Cited by 23 publications

(15 citation statements)

References 70 publications

(69 reference statements)

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“…Beyond this concentration, the percentage removal decreases very slightly. This scenario is against the report by several authors [20][21][22][23] where the removal percentage increases with increase in initial concentrations. However, a similar case was observed in an investigation by Moosa et al, Olayinka et al [24,25] where removal percentage increases with increase in initial concentration and thereafter have a sharp decrease.…”

Section: Effect Of Initial Concentration Of Adsorbatecontrasting

confidence: 71%

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Adsorption and Optimization Studies of Congo Red from Solution Using Montmorillonite-Silica Nanocomposite

Shehu

Lamayi

Linda

et al. 2018

CJAST

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Congo red was removed on Montmorillonite-silica nanocomposite from solution by adsorption process. The adsorption parameters studied were adsorbent dose, initial concentration and contact time. The optimum adsorption parameters were found to be 2 mg/L, 1.5 g and 40 minutes for initial concentration, adsorbent dose and contact time respectively with removal percentage of 84.10%. Pseudo first and second order kinetics were used for the studies. Pseudo second order best fit the adsorption process with R 2 = 1 than the Pseudo first order which has R 2 = 0.933. Experimental data were best fitted by the Langmuir Isotherm with R 2 =0.9024 other than the Freundlich Isotherm, R 2 =0.568. The R L of 0.994 of the Langmuir isotherm shows the favourability of the adsorption process. The maximum adsorption capacity by Langmuir isotherm was found to be 172. 40 mg/g.

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Section: Effect Of Initial Concentration Of Adsorbatecontrasting

confidence: 71%

“…1. This scenario is against the report by several authors [21][22][23][24] where the removal percentage increases with increase in adsorbent concentrations. However, a similar case was reported by Olayinka et al [25], in which removal percentage increases with increase in adsorbent dose and thereafter has a sharp decrease.…”

Section: Effect Of Adsorbent Dosecontrasting

confidence: 66%

Adsorption and Optimization Studies of Congo Red from Solution Using Montmorillonite-Silica Nanocomposite

Shehu

Lamayi

Linda

et al. 2018

CJAST

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“…Adsorption efficiency changes with changing pH value. As at acidic pH, a large H + concentration results in protonation of the several group such as amine with PMC framework, give rise to electrostatic interactions 48 . However at neutral pH, protonation of amine groups was nominal due to the negligible concentration of free H + .…”

Section: Resultsmentioning

confidence: 99%

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Sasidharan

Sachan

Chauhan

et al. 2021

Sci Rep

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The continuously increased existence of contaminants such as chemical and biological mainly dye, bacteria, and heavy metals ions (HMI) in water bodies has increased environmental concern due to their hostile effects on living things. Therefore, there is necessity to be developed newer materials that skirmishes such environmental menace. The present works focus on the synthesis of a novel three-dimensional (3D) polymer-metal–carbon (3D-PMC) framework for the exclusion of contaminants (chemical and biological) from water bodies. Initially, polyurethane (PU) foam was treated with nitric acid and used as a framework for the development of 3D-PMC materials. The copper nanosheet (Cu-NS) was deposited onto the functionalized PU foam to produce Cu-NS-PU material. The mechanically exfoliated graphene was mixed with chitosan to produce a graphene-chitosan homogenous suspension. The produce homogenous suspension was deposited Cu-NS-PU for the development of the 3D-PMC framework. The prepared 3D-PMC framework was characterized by scanning electron microscopy (SEM), Energy Dispersive X-Ray Analysis (EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-rays diffraction (XRD) analysis. The prepared 3D-PMC framework was subjected to various adsorption parameters to assess the sorption ability of the material. The prepared 3D-PMC framework was effectively used for the removal of chromium (Cr) metal ions and Congo-red (CR) dye from the water system. The synthesis of the 3D-PMC framework is simple, novel, cost-effective, and economically viable. Therefore, the prepared 3D-PMC framework has the potential to be used as a filter assembly in water treatment technologies.

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“…The adsorption spontaneity was illustrated from the thermodynamic parameters such as enthalpy (∆H°), entropy (∆S°) and free energy (∆G°) using the following equations [40].…”

Section: Thermodynamic Studymentioning

confidence: 99%

Optimization and Feasibility of Alizarin Red S Retention on Iron- Loaded Cellulose Nanocomposite Bead

Sarkar

et al. 2020

Nanoarchitectonics

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Iron(III) loaded cellulose nanocomposite bead, synthesized through sol-gel method, was characterized by Fourier transform infra-red spectroscopy, field emission scanning electron microscopy, energy dispersive spectroscopy, atomic force microscopy, tunneling electron microscopy, and tested for adsorptive removal of alizarin red S from aqueous solution. The influence of variables such as pH, contact time, initial dye concentration, adsorbent dose and temperature for dye retention were investigated in batch operation. The process was optimized by employing response surface methodology following full factorial and central composite design. The maximum adsorption of 97% was observed at an optimum condition of pH 3.0, dose of 2.0 gdm-3 and shaking time of 45 mins corresponding to the dye concentration of 100 mgdm-3 at 303 K. Correlation of cooperative influences of the significant variables and the extent of dye adsorption were represented by a second order polynomial equation. The mutual interactions of the significant variables were presented by 3D response surface and 2D contour plots in the design space. The adsorption was better described by Langmuir isotherm and pseudo second order kinetics. The process was spontaneous (-∆G°, 48.19 kJmol-1 ), feasible (∆S°, 0.284 Jmol -1 K-1 ) and endothermic (∆H°, 71.62 kJmol-1 ). The adsorbent can be regenerated with NaOH (10.0 × 10-2 M) and recycled for reuse, at least for five successive operations.

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Removal of Congo Red from Aqueous Solution Using Magnetic Chitosan Composite Microparticles

Cited by 23 publications

References 70 publications

Adsorption and Optimization Studies of Congo Red from Solution Using Montmorillonite-Silica Nanocomposite

Adsorption and Optimization Studies of Congo Red from Solution Using Montmorillonite-Silica Nanocomposite

Three-dimensional (3D) polymer—metal–carbon framework for efficient removal of chemical and biological contaminants

Optimization and Feasibility of Alizarin Red S Retention on Iron- Loaded Cellulose Nanocomposite Bead

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