Adsorption study of reactive dyes onto porous clay heterostructures

Aguiar, J. E.; Cecilia, Juan Antonio; Tavares, P.A.S.; Azevedo, Diana C. S.; Castellón, Enrique Rodríguez; Lucena, Sebastião M. P.; Silva, I.J.

doi:10.1016/j.clay.2016.09.001

Cited by 88 publications

(56 citation statements)

References 35 publications

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“…The data revealed a strong influence of the adsorption with the pH, obtaining an encapsulation of 44 % at pH=11 after 30 min . In addition, PCHs have been used to adsorb anionic dyes, such as Remazol Violet 5R and Acid Blue 25 . These authors reported that the incorporation of Zr in the walls of PCH enhances the dye adsorption capacity.…”

Section: Uses and Applications Of Pchsmentioning

confidence: 99%

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Cecilia

García‐Sancho

Vilarrasa-García

et al. 2018

The Chemical Record

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Porous clay heterostructures (PCH) are obtained by the insertion of an organic bulky cation in the interlayer spacing of a smectite, causing a swelling of the clay mineral. Right after, oxides species, mainly silicon oxide, are incorporated as pillars galleries between adjacent layers to form a porous structure after the removal of the template. The ordering of the clay mineral as well the organic cation incorporated in the synthetic step favors the modulation of the textural properties of the PCH. In addition, the incorporation of heteroatoms in the pillars galleries can also modulate the acidity of the PCH. The modulation of the pore size and the acid properties provides to these materials a wide range of applications in the fields of adsorption and catalysis. This paper carries out a detailed review of the synthesis of PCH, characterization as well as uses and application reported in the literature.

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Section: Uses and Applications Of Pchsmentioning

confidence: 99%

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Cecilia

García‐Sancho

Vilarrasa-García

et al. 2018

The Chemical Record

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“…Of late, the environmental degradation of aqueous streams has been worsening because of inappropriate disposal of effluents released from different industries, which generally consist of diverse types of organic and inorganic contaminants that are usually difficult to biodegrade and are often toxic for aquatic living beings . Colored wastewater discharged from leather, textiles, paper and pulp, paints, cosmetics and other industries mostly have large content of dyes, which affect the visibility and increase chemical oxygen demand (COD) of the receiving water bodies, and reduce the penetration of sunlight hampering photosynthetic activity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Hussain

Siddiqui

Khan

2019

Env Prog and Sustain Energy

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NiFe 2 O 4 /polythiophene nanocomposite was synthesized by in situ chemical oxidative polymerization of thiophene in NiFe 2 O 4 nanoparticles presence, whereas NiFe 2 O 4 nanoparticles were prepared via coprecipitation method. Fourier transform infrared (FTIR), X-ray diffraction (XRD), UV-Visible, and SEM, EDX techniques were used for characterization of the nanocomposite. The effect of various parameters such as adsorbent dose, contact time, initial dye concentration, and initial pH of solution on the adsorption of Janus green B (JG) and Fuchsin basic (FB) onto the nanocomposite was optimized by batch studies. The equilibrium uptake data ascribed well to the Langmuir model with maximum adsorption capacity of 143 and 498 mg/g at 303 K for JG and FB, respectively. The exceptional high adsorption capacity of NiFe 2 O 4 /polythiophene nanocomposite for JG and FB was ascribed to π-π and electrostatic interactions. Kinetics studies pointed out that JG and FB removal followed pseudo-second order model. The negative values of ΔH (JG: -47.28; FB: −38.00 kJ/ mol) and ΔG (JG: −9.347 to −6.442; FB: −14.16 to -12.85 kJ/mol) pointed out the feasibility, spontaneity, and exothermic nature of removal process. Negative value of ΔS (JG: -0.125; FB: -0.078 kJ/mol) suggested decrease in randomness at the solid/ liquid interface. The results showed that NiFe 2 O 4 /polythiophene is an appealing adsorbent for the uptake of JG and FB dyes from aquatic environment. K E Y W O R D S adsorption, Fuchsin basic, Janus green B, NiFe 2 O 4 /polythiophene nanocomposite, non-linear regression analyses, thermodynamics

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“…Dyes can be classified according to their charge (anionic, cationic and non-ionic). Basic dyes are widely used in the dyeing industries of acrylic, silk-based nylon and wool 3,4 . These industries also create serious problems that lead to the deterioration of human health and the environment by discharging large amounts of pollutants into water sources without any previous treatment 5 .…”

Section: Introductionmentioning

confidence: 99%

Removal of Basic Dyes from Aqueous Solutions by Adsorption onto Moroccan Clay (Fez City)

Zaitan¹,

Bencheqroun²,

Mrabet³

et al. 2019

Mediterr.J.Chem.,

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The main objective of this study was to investigate the potential of natural clay obtained (from Fez city, Morocco) as an adsorbent for the removal of basic dyes (Astrazon Blue BG and Astrazon Yellow 7GLL) from liquid effluents. Natural clay was characterised using different physical-chemical methods, including nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), pH of the point of zero charge (pHPZC) and Boehm titration method. The clay was tested to remove various textile dyes from the aqueous solution at room temperature. Parameters such as initial dye concentration, solution pH, adsorbent dosages and contact time were performed in a batch system for controlling the operating conditions. Experimental results data indicated that the adsorption process is a fast and spontaneous reaction. A pseudo-second-order kinetic model provides the best fit to the experimental data of BG and YL adsorption onto the natural clay. Theadsorption isotherm data of both the dyes onto the natural clay were fitted well to the Langmuir model. A maximum monolayer adsorption capacity of 101 mg.g-1 for BG and 127 mg.g-1 for YL are obtained at 298.15 K.The results suggest that the natural clay could be used as an inexpensive adsorbent for the removal of the textile dyes from aqueous solutions.

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Adsorption study of reactive dyes onto porous clay heterostructures

Cited by 88 publications

References 35 publications

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Removal of Basic Dyes from Aqueous Solutions by Adsorption onto Moroccan Clay (Fez City)

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Adsorption study of reactive dyes onto porous clay heterostructures

Cited by 88 publications

References 35 publications

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Synthesis, Characterization, Uses and Applications of Porous Clays Heterostructures: A Review

Preparation of NiFe2O4/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies

Removal of Basic Dyes from Aqueous Solutions by Adsorption onto Moroccan Clay (Fez City)

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Preparation of NiFe₂O₄/polythiophene nanocomposite and its enhanced adsorptive uptake of Janus green B and Fuchsin basic from aqueous solution: Isotherm and kinetics studies