Removal of triphenylmethane and reactive azo dyes from aqueous solution by magnetic carbon nanotube-κ-carrageenan-Fe3O4 nanocomposite

Duman, Osman; Tunç, Sibel; Bozoğlan, Bahar Kancı; Polat, Tülin Gürkan

doi:10.1016/j.jallcom.2016.06.160

Cited by 228 publications

(56 citation statements)

References 66 publications

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“…Under such circumstances, there will be a special concentration of the dye, where the adsorption may have more interpretations. However, the preparation of the suspension with uniformity of the particles is probably impossible due to the natural origin against the synthesized activated carbon particles; we could approach an ideal composition of the samples to make optimal measuring conditions, which are useful for defining an interval of the adsorption capacity of the surfaces and estimation of the specific surface area [18] Various adsorbents such as activated carbon [19], some clays [20,21], and carbon nanotubes [22,23] were successfully used to remove dyes from aqueous solution. The most widely used adsorbents for the adsorption process in industrial wastewater treatment systems is activated carbon due to its large specific area.…”

Section: Introductionmentioning

confidence: 99%

Methylene Blue Adsorption Study on Microcline Particles in the Function of Particle Size Range and Temperature

2019

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In this paper, the adsorption process of methylene blue has been investigated on microcline particles as a function of particle size and temperature. The characterization of microcline in the particle size ranges of 1−71 μm and 71−315 μm gained by sieving was proved using X-ray diffraction (XRD) and scanning electron microscopy combined with energy-dispersive detector (SEM-EDS) in powder form, over laser diffraction measurements in aqueous suspension. The optimum dosage of adsorbent was 13.5 g/L in dye adsorption and the adsorption isotherms on both microcline size fractions were determined at this adsorbent concentration. The maximum adsorption capacities were in the range of 1.5–3.1 mg g−1 on microcline particles with supplementing evaluation of isotherms using the Langmuir model. Considering the problems of linearization of equations, the non-linear least-squares estimation can be strongly recommended for modeling adsorption-equilibrium. The adsorption isotherm determined at elevated temperature of 60−65 °C represents a breakpoint at around 20 mg L−1 of equilibrated dye concentration due to performing of a potential process of dye self-association. According to our experiments, the increase in temperature has an adverse effect on adsorption.

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Section: Introductionmentioning

confidence: 99%

Methylene Blue Adsorption Study on Microcline Particles in the Function of Particle Size Range and Temperature

2019

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“…In general, centrifugation and filtration methods are used to separate the adsorbents from aqueous solution, but these methods have several disadvantages in addition to being time‐consuming. Centrifugation methods require energy to create very high speeds, whereas filtration methods lead to filter blockages . The use of magnetic separation methods offers an alternative way to address such disadvantages .…”

Section: Introductionmentioning

confidence: 99%

“…Centrifugation methods require energy to create very high speeds, whereas filtration methods lead to filter blockages. 31 The use of magnetic separation methods offers an alternative way to address such disadvantages. 32 Therefore, a new class of hydrophilic and highly effective CMPs would solve the aforementioned issues for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Preparation of magnetic conjugated microporous polymers for highly efficient removal of dye from water

Wang

Yang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND A magnetic conjugated microporous polymer (MCMP) composite was designed with bromo groups of CMP and amino groups on the surface of Fe3O4 nanoparticles that acted as promising adsorbents for wastewater treatment. Fe3O4 nanoparticles were successfully bonded on the predesigned CMP material to form the MCMP by means of a new and simple nucleophilic substitution reaction in organic media. RESULTS The MCMP could be separated by applying an external magnetic field because of the Fe3O4 nanoparticles. It exhibited sufficient dye adsorption for methylene blue (MB) with a high sorption capability of 869.43 mg g−1 in aqueous solutions. The recovery and reusability of MCMP were >70% after six cycles of desorption and regeneration, indicating that the MCMP had excellent cycle stability. The magnetization saturation strength of MCMP was 13.5 emu g−1 which was sufficient to be magnetically separated from wastewater using artificial magnetic fields. CONCLUSION The MCMP possessed excellent adsorption capacity and dispersibility, and good recyclability after banded with functionalized Fe3O4 nanoparticles. The excellent properties of MCMP indicated that it could be used as an adsorbent with great application potential for quick separation of water pollutants such as dyes in wastewater treatment. © 2019 Society of Chemical Industry

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“…In recent years, modified multi-walled carbon nanotubes (MWCNTs) have been widely used in the field of water treatment [19,20]. The most used materials are synthetic and natural polymers in the modification of MWCNTs [21,22]. These studies show that modified multi-walled carbon nanotubes have a strong binding capacity and a large adsorption capacity, and are an ideal adsorbent material.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Congo red from solution using chitosan modified carbon nanotubes

Yang¹,

Du²,

Li³

et al. 2019

DWT

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Chitosan (CS) modified multi-walled carbon nanotubes (MWCNTs) were used as adsorbents (CS-MWCNTs) to adsorb Congo red (CR, anionic dye) from solution in batch mode. The structure and morphology of CS-MWCNTs were characterized by TEM, FTIR, Raman and XPS. The results from analysis of FTIR and XPS showed that CS was successfully loaded onto the MWCNTs. Raman analysis showed that the basic structure of MWCNTs after CS modification did not change. Adsorption studies were performed at different pH, coexisted ions concentrations, contact time and CR concentrations in the batch mode. Results showed that the pH of CR solution at 4.0 was best for the adsorption and the adsorption capacity could reach up to 623 mg•g-1 at 303K. The adsorption of the CR solution reached equilibrium within 8 h. Adsorption equilibrium data can be predicted by the Freundlich model while the kinetic adsorption data follow a pseudo-second-order model. Thermodynamic results showed that the adsorption process was spontaneous, and endothermic. The CR-loaded adsorbent can be regenerated using a 0.01 mol•L −1 NaOH solution, the regeneration rate can still reach 71% after three cycles. CS-MWCNTs may be available in removal of anionic dyes from solution.

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Removal of triphenylmethane and reactive azo dyes from aqueous solution by magnetic carbon nanotube-κ-carrageenan-Fe3O4 nanocomposite

Cited by 228 publications

References 66 publications

Methylene Blue Adsorption Study on Microcline Particles in the Function of Particle Size Range and Temperature

Methylene Blue Adsorption Study on Microcline Particles in the Function of Particle Size Range and Temperature

Preparation of magnetic conjugated microporous polymers for highly efficient removal of dye from water

Adsorption of Congo red from solution using chitosan modified carbon nanotubes

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