Ultrasonic-assisted synthesis of Populus alba activated carbon for water defluorination: Application for real wastewater

Bonyadi, Ziaeddin; Kumar, Ponnusamy Senthil; Foroutan, Rauf; Kafaei, Raheleh; Arfaeinia, Hossein; Farjadfard, Sima; Ramavandi, Bahman

doi:10.1007/s11814-019-0373-0

Cited by 70 publications

(25 citation statements)

References 38 publications

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“…The results showed that with increasing the adsorbent dose of ACL and ACL/Fe 3 O 4 magnetic nanocomposite from 0.5 g/L to 5 g/L, the adsorption efficiency increased from 57.82% and 63.41% to 98.61% and 99.34%, respectively. Increasing the adsorption efficiency by increasing the adsorbent dose can be due to increasing the number of unsaturated and available active sites [ 43 , 44 ]. According to Figure 7 a, the optimal adsorbent dose for ACL and ACL/Fe 3 O 4 magnetic nanocomposite was determined to be 2 g/L and 1.25 g/L, respectively.…”

Section: Resultsmentioning

confidence: 99%

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Foroutan

Peighambardoust

Pateiro³

et al. 2021

Molecules

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218

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Activated carbon prepared from lemon (Citrus limon) wood (ACL) and ACL/Fe3O4 magnetic nanocomposite were effectively used to remove the cationic dye of crystal violet (CV) from aqueous solutions. The results showed that Fe3O4 nanoparticles were successfully placed in the structure of ACL and the produced nanocomposites showed superior magnetic properties. It was found that pH was the most effective parameter in the CV dye adsorption and pH of 9 gave the maximum adsorption efficiency of 93.5% and 98.3% for ACL and ACL/Fe3O4, respectively. The Dubinin–Radushkevich (D-R) and Langmuir models were selected to investigate the CV dye adsorption equilibrium behavior for ACL and ACL/Fe3O4, respectively. A maximum adsorption capacity of 23.6 and 35.3 mg/g was obtained for ACL and ACL/Fe3O4, respectively indicating superior adsorption capacity of Fe3O4 nanoparticles. The kinetic data of the adsorption process followed the pseudo-second order (PSO) kinetic model, indicating that chemical mechanisms may have an effect on the CV dye adsorption. The negative values obtained for Gibb’s free energy parameter (−20 < ΔG < 0 kJ/mol) showed that the adsorption process using both types of the adsorbents was physical. Moreover, the CV dye adsorption enthalpy (ΔH) values of −45.4 for ACL and −56.9 kJ/mol for ACL/Fe3O4 were obtained indicating that the adsorption process was exothermic. Overall, ACL and ACL/Fe3O4 magnetic nanocomposites provide a novel and effective type of adsorbents to remove CV dye from the aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Foroutan

Peighambardoust

Pateiro³

et al. 2021

Molecules

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218

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“…Activated carbon is widely used to remove dyes from wastewater because of its convenience, ease of operation, simplicity of design, and reusability 1 – 3 , 35 – 37 . However, despite its extensive use in wastewater treatment, some commercial activated carbon remains an expensive material 35 – 37 . Therefore, interest in lower-cost alternatives to commercially available activated carbon that would still provide safe and economical methods of removing dyes from contaminated water has increased.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, basic treatment tends to have relatively large ion exchange capacities due to alkalinity and abundance of –OH groups. However, most of the related studies used only either one of the pretreatment methods mentioned 1 , 2 , 16 , 20 , 35 , 37 , 39 – 43 , 45 . To acknowledge the gap in this area, this study investigated the systematic effect of pretreatment using both acidic and basic activating agents to compare the characteristics using multiple characterization analyses.…”

Section: Introductionmentioning

confidence: 99%

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Nizam

Hanafiah

Mahmoudi

et al. 2021

Sci Rep

239

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In this study, two biomass-based adsorbents were used as new precursors for optimizing synthesis conditions of a cost-effective powdered activated carbon (PAC). The PAC removed dyes from an aqueous solution using carbonization and activation by KOH, NaOH, and H2SO4. The optimum synthesis, activation temperature, time and impregnation ratio, removal rate, and uptake capacity were determined. The optimum PAC was analyzed and characterized using Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), a field emission scanning electron microscope (FESEM), Zeta potential, and Raman spectroscopy. Morphological studies showed single-layered planes with highly porous surfaces, especially PAC activated by NaOH and H2SO4. The results showed that the experimental data were well-fitted with a pseudo-second-order model. Based on Langmuir isotherm, the maximum adsorption capacity for removing methylene blue (MB) was 769.23 mg g−1 and 458.43 mg g−1 for congo red (CR). Based on the isotherm models, more than one mechanism was involved in the adsorption process, monolayer for the anionic dye and multilayer for the cationic dye. Elovich and intraparticle diffusion kinetic models showed that rubber seed shells (RSS) has higher α values with a greater tendency to adsorb dyes compared to rubber seed (RS). A thermodynamic study showed that both dyes’ adsorption process was spontaneous and exothermic due to the negative values of the enthalpy (ΔH) and Gibbs free energy (ΔG). The change in removal efficiency of adsorbent for regeneration study was observed in the seventh cycles, with a 3% decline in the CR and 2% decline in MB removal performance. This study showed that the presence of functional groups and active sites on the produced adsorbent (hydroxyl, alkoxy, carboxyl, and π − π) contributed to its considerable affinity for adsorption in dye removal. Therefore, the optimum PAC can serve as efficient and cost-effective adsorbents to remove dyes from industrial wastewater.

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“…In particular, if compared to the other processes, the adsorption method is an effective way for pollutants abatement from wastewater, 16 thanks to its simplicity, low cost, high performance and efficiency, low selectivity, and no production of secondary sludge. [17][18][19] In addition to the mentioned advantages, when the content of metal ions in industrial wastewater is in the range of 10-100 mg L À1 or the concentration of ions of discharged metals is less than 1 mg L À1 , the adsorption method is effective. 3 In the last years for this kind of application, various solid sorbents have been investigated, such as Tamarix hispida activated carbon, 20 Aspergillus avus biomass, 21 magnetic MnFe 2 O 4 , 22 and nano bentonite.…”

Section: Introductionmentioning

confidence: 99%

Zn²⁺ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe₃O₄ magnetic composite under ultrasonic waves

et al. 2021

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Ultrasonic-assisted synthesis of Populus alba activated carbon for water defluorination: Application for real wastewater

Cited by 70 publications

References 38 publications

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Zn²⁺ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe₃O₄ magnetic composite under ultrasonic waves

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Ultrasonic-assisted synthesis of Populus alba activated carbon for water defluorination: Application for real wastewater

Cited by 70 publications

References 38 publications

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

The removal of anionic and cationic dyes from an aqueous solution using biomass-based activated carbon

Zn2+ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe3O4 magnetic composite under ultrasonic waves

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Product

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Zn²⁺ removal from the aqueous environment using a polydopamine/hydroxyapatite/Fe₃O₄ magnetic composite under ultrasonic waves