Novel magnetic gel beads based on ionically crosslinked sodium alginate and polyanetholesulfonic acid: Synthesis and application for adsorption of cationic dyes

Metin, Ayşegül Ülkü; Doğan, Deniz; Can, Muzaffer

doi:10.1016/j.matchemphys.2020.123659

Cited by 44 publications

(19 citation statements)

References 55 publications

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“…The influence of pH on adsorption efficiency has been studied and reported (Ho, 2005;Metin et al, 2020;Shahnaz et al, 2022 ). pH affects the ionization degree of the functional groups on the biosorbent surface.…”

Section: Effect Of Solution Phmentioning

confidence: 99%

Scenedesmus regularis: An alternative biosorbent for the efficient and fast removal of methylene blue

2022

Global NEST: The International Journal

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<p>This study focused on removing methylene blue (MB) from aqueous solutions using microalga Scenedesmus regularis as a biosorbent. The biomass was characterized by Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscopy (FE-SEM). The difference in thermal properties of the biomass was investigated by thermogravimetric analysis (TGA). The adsorption capacity of S. regularis was tested with different environmental key parameters (pH, temperature, biosorbent dosage, dye concentration, and contact time) in batch system experiments. The maximum adsorption capacity was 341.34 mg/g at a pH of 6.8, a temperature of 25 °C, a dye concentration of 250 mg/L, and a biosorbent concentration of 5 mg. Approximately 92% of the dye was removed within two minutes, and the removal efficiency reached 99% within 15 minutes. MB adsorption equilibrium data fit well with the Langmuir (R2=0.994) and Dubinin-Radushkevich (R2=0.993) isotherm models. The kinetic model of adsorption followed pseudo-second-order kinetics. Thermodynamic parameters showed that the adsorption process was endothermic and physical, favorable, and spontaneous. The results showed that S. regularis is an eco-friendly biosorbent with efficient performance that may be used for MB removal without any modification.</p>

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Section: Effect Of Solution Phmentioning

confidence: 99%

Scenedesmus regularis: An alternative biosorbent for the efficient and fast removal of methylene blue

2022

Global NEST: The International Journal

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“…This spheroidization property makes it an ideal framework for the preparation of composite adsorbents. Therefore, the combination of sodium alginate and chitosan to prepare a composite adsorbent can achieve the effect of enhancing the adsorption performance [17].…”

Section: Introductionmentioning

confidence: 99%

Study on the Performance of Composite Adsorption of Cu2+ by Chitosan/β-Cyclodextrin Cross-Linked Zeolite

Xiong

Zhang

2022

Sustainability

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In order to remove Cu2+ from wastewater, a kind of microsphere adsorbent (SCDO) with high efficiency for Cu2+ adsorption was prepared by the microdrop condensation method, where chitosan (CTS) and sodium alginate (SA) were used as the matrix to crosslink β-cyclodextrin (β-CD) and zeolite (Zeo). The structure and properties of SCDO were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Upon that, the adsorption performance of SCDO for Cu2+ was studied, in which the effects of pH, initial concentration, dosage, adsorption time and temperature were investigated. The results showed that the removal rate of Cu2+ reached 97.08%, and the maximum adsorption capacity was 24.32 mg/g with the temperature at 30 °C, the dosage of SCDO at 12 g/L, the initial concentration of Cu2+ at 100 mg/L, the pH of the solution at 6.0 and the adsorption time at 120 min, respectively. The adsorption process of Cu2+ by SCDO occurred in accordance with quasi-second-order kinetics model and Langmuir adsorption isotherm. After four repeats of continuous adsorption and desorption, the regenerative removal rate of Cu2+ could still reach 84.28%, which indicated that SCDO had outstanding reusability.

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“…[51][52][53] It has also been used in combination with other materials to remove general dyes and/or MB. [54][55][56][57][58][59] However, according to the literature, SA has not been used as a WSP to remove MB through PEUF.…”

Section: Introductionmentioning

confidence: 99%

Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

Oyarce

Santander

Butter

et al. 2021

J of Applied Polymer Sci

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In this study, the removal of methylene blue (MB) cationic dye from an aqueous solution was investigated using the polymer-enhanced ultrafiltration (PEUF) technique with sodium alginate (SA) as an extracting soluble polymer, in combination with an ultrafiltration membrane of regenerated cellulose with a 10 kDa molar mass cut-off. SA was characterized via Fourier-transform infrared spectroscopy and thermogravimetric analysis. For ultrafiltration studies, the washing method was used to evaluate various experimental variables, such as the pH, SA dose and initial MB concentration, and adsorption isotherms to identify the optimal adsorption conditions. Finally, the regeneration of the SA polymer was evaluated in five consecutive cycles of adsorption-desorption of MB. In the obtained characterization results, the structural composition of SA and the characteristic thermal stability of the polymer were verified. The PEUF results demonstrated that a retention capacity of 98% of the MB was realized at pH 8.0 using 0.025 g of SA at an initial optimal MB concentration of 50 mg L −1 . It is possible to observe that the Freundlich model better explain the interaction between the dye and the polymer surface. According to the results is demonstrated the regeneration capacity of the polymer and its subsequent reuse.

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Novel magnetic gel beads based on ionically crosslinked sodium alginate and polyanetholesulfonic acid: Synthesis and application for adsorption of cationic dyes

Cited by 44 publications

References 55 publications

Scenedesmus regularis: An alternative biosorbent for the efficient and fast removal of methylene blue

Scenedesmus regularis: An alternative biosorbent for the efficient and fast removal of methylene blue

Study on the Performance of Composite Adsorption of Cu2+ by Chitosan/β-Cyclodextrin Cross-Linked Zeolite

Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer‐enhanced ultrafiltration technique

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