Comparative study of cationic and anionic dye removal from aqueous solutions using sawdust‐based adsorbent

Doltabadi, Maryam; Hossein, Arzani; Davoudi, Mojtaba

doi:10.1002/ep.12334

Cited by 41 publications

(17 citation statements)

References 63 publications

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“…C constant value) was fixed at 47.398 mg g -1 . In the literature, a single-step reaction was reported by Doltabadi et al (20) for adsorption of cationic and anionic dyes onto sawdust-based adsorbent and a three-step plot was drawn by Witek-Krowiak for adsorption of malachite green onto beech sawdust (40).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Preparation, Characterization, and Application of Silica Aerogel for Adsorption of Phenol: An In-Depth Isotherm Study

et al. 2018

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This study evaluated silica aerogel as an adsorbent for phenol removal from aqueous solutions. Silica aerogel was prepared through the sol-gel process and characterized by different analyses. Then, it was used for phenol removal under various conditions of operational parameters. Also, twelve isotherm parameters were employed to describe the behavior of phenol-silica aerogel adsorption system. The chemical structural analysis confirmed -OH functional groups in amorphous SiO2 and proved the adsorption of phenol onto the surface of silica aerogel. The findings of the adsorptive behavior of silica aerogel toward phenol showed increasing pH, up to 8.5, and contact time, and adsorbent dose increased the phenol removal. The removal efficiency reached over 90% when phenol concentration was below 50 mg L -1 . The reaction kinetics followed the pseudo-first order model. The isotherm study showed that equilibrium adsorption data were well-described by Freundlich and Halsey equations, among two-parameter isotherms, and Hill, Sips, and Koble-Corrigan, among three-parameter isotherms. Jovanovic and BET were the worst isotherm models for prediction of experimental equilibrium data. The maximum adsorption capacity of 75.23 mg.g -1 was calculated in phenol-silica aerogel adsorption system. The study showed silica aerogel as an efficient adsorbent to remove phenol from phenol-containing solutions.

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Section: Adsorption Kineticsmentioning

confidence: 99%

Preparation, Characterization, and Application of Silica Aerogel for Adsorption of Phenol: An In-Depth Isotherm Study

et al. 2018

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“…The separation factor R L indicates the nature and the feasibility of the adsorption process. The R L value was found to be 0.216, which indicates that the adsorption of dye molecules on the nano iron particles surface is favorable . In addition the desorption behavior of residual nano iron particles on the treated dye solution was observed.…”

Section: Resultsmentioning

confidence: 87%

“…The complete degradation of textile dyes is not possible with available conventional [10,11] and advanced treatment methods [12][13][14]. The need of identifying an efficient, non-toxic, cost-effective technique to treat textile dyes and wastewater is substantial to protect the environment [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Decolorization of Mono Azo Dye and Textile Wastewater using Nano Iron Particles

Raman

Kanmani

2018

Env Prog and Sustain Energy

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Treatment of textile dyeing wastewater using existing physio‐chemical and biological methods is challenging and needs an efficient technique to manage toxic and recalcitrant textile dyes in the environment. As the nano iron particles are highly reactive, nontoxic, and cost‐effective, this study demonstrates the potential of nano iron particles in the decolorization of mono azo methyl orange dye and application to decolorize textile dyeing wastewater. The dye was decolorized 98% within 30 min of reaction time and 54% reduction in total organic carbon was observed. The detected intermediates products such as m/z 149, 128, 84, 73, 56, 55 confirm the efficiency of nano iron particles in degrading textile dyes into lower molecular compounds. The dye decolorization pathway and reaction mechanism are proposed. The treatment of real textile dyeing industry wastewater showed 82% dye color removal and reasonable reduction in the quantity of inorganic pollutants such as chlorides, sulfates. Hence,nano iron particles are highly recommended to remediate textile dyeing wastewater effectively. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S366–S376, 2019

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“…The Adj. R 2 values close to one along with lower values of SSE and v 2 are normally associated with a better fit [52]. As can be seen, both models have enough adequacies to describe the experimental data, although Langmuir is a slightly better model for this purpose.…”

Section: Adsorption Isothermmentioning

confidence: 81%

“…The quality of fit of isotherm models is visualized in Figure 9. R 2 values close to one along with lower values of SSE and v 2 are normally associated with a better fit [52]. The fitting quality of isotherm models was expressed numerically using statistical indices including Adj.…”

Section: Adsorption Isothermmentioning

confidence: 99%

Adsorptive removal of arsenic from aqueous solutions using magnetite nanoparticles and silica‐coated magnetite nanoparticles

Jamali-Behnam

Najafpoor

Davoudi

et al. 2017

Env Prog and Sustain Energy

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Magnetite nanosorbents are known with high sorption capacity and ease of solid phase separation from surrounding liquid by the imposed external magnetic field. In this study, magnetite nanoparticles (MNPs) and silica‐coated magnetite nanoparticles (Si‐MNPs) were prepared and used for the removal of arsenic (III) from aqueous solutions. The nanosorbents were characterized by transmission electron microscope, X‐ray diffraction, Fourier transform infrared spectroscopy, and vibrating sample magnetometer. The spherical Fe3O4 nanoparticles in diameter of about 100 nm and SiO2 shells of 12 nm were formed. The saturation magnetization was found to be 78 and 58 e mug–1 for MNPs and Si‐MNPs, respectively. Under optimal conditions, both nanosorbents were very efficient for arsenite uptake (removal efficiency ≥99%). The highest removal percentage was obtained near PZC of nanosorbents where the net surface charge was zero. The MNPs exhibited higher sorption capacities in comparison with Si‐MNPs although they tended to be agglomerated in higher applied doses. The kinetic of experiments indicated the best fit to the pseudo‐second order model. Furthermore, the experimental data were best described by the Langmuir model. This study demonstrated the effectiveness of bare and silica coated magnetic nanoparticles to remove trace concentrations of arsenic (III) in water environment. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 951–960, 2018

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Comparative study of cationic and anionic dye removal from aqueous solutions using sawdust‐based adsorbent

Cited by 41 publications

References 63 publications

Preparation, Characterization, and Application of Silica Aerogel for Adsorption of Phenol: An In-Depth Isotherm Study

Preparation, Characterization, and Application of Silica Aerogel for Adsorption of Phenol: An In-Depth Isotherm Study

Decolorization of Mono Azo Dye and Textile Wastewater using Nano Iron Particles

Adsorptive removal of arsenic from aqueous solutions using magnetite nanoparticles and silica‐coated magnetite nanoparticles

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