Evaluation of natural and cationic surfactant modified pumice for congo red removal in batch mode: Kinetic, equilibrium, and thermodynamic studies

Shayesteh, Hadi; Rahbar-Kelishami, Ahmad; Norouzbeigi, Reza

doi:10.1016/j.molliq.2016.05.053

Cited by 173 publications

(38 citation statements)

References 62 publications

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“…The maximal removal percentage was ∼97.19 ± 1.8%. At the same time, the adsorption capacity of zein nanofibers gradually decreased with an increase in their amount, which can be due to unsaturation of active sites . From these results, it may be estimated that for the treatment of 1000 L of industrial wastewater, only 8 kg of this economically viable adsorbent is required.…”

Section: Resultsmentioning

confidence: 92%

“…At the same time, the adsorption capacity of zein nanofibers gradually decreased with an increase in their amount, which can be due to unsaturation of active sites. 39 From these results, it may be estimated that for the treatment of 1000 L of industrial wastewater, only 8 kg of this economically viable adsorbent is required. Therefore, this adsorbent may serve as an efficient alternate for the treatment of dye-loaded waste streams in textile industries.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Electrospun Zein Nanofiber as a Green and Recyclable Adsorbent for the Removal of Reactive Black 5 from the Aqueous Phase

Qureshi

Kim

Ahmed

et al. 2017

ACS Sustainable Chem. Eng.

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Zein polymer is drawing intense research interest because of its nontoxicity, biodegradability, and unique structural properties. Zein-based electrospun nanofibers are prepared from an 80% ethanolic solution and are used as a nanoadsorbent material for the confiscation of reactive black 5 (RB5) dye from aqueous solutions. The electrospun nanofibers possessed an extraordinarily high capacity for RB5 uptake compared to their powder and film analogues. Zein nanofibers exhibited exceptionally efficient performance in removing RB5 after contact for only 20 min at room temperature and a normal working pH. The mechanism of dye–zein interaction was chiefly controlled via hydrophobic, electrostatic forces and hydrogen bond interactions. Experimental data followed a pseudo-second-order model, and the Langmuir adsorption isotherm was the most appropriate mechanism governing RB5 adsorption. The dye-loaded zein nanofibers were directly re-electrospun to achieve a recyclable and green adsorbent, preventing the consumption of toxic and expensive reagents for elution of RB5.

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Section: Resultsmentioning

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 99%

Electrospun Zein Nanofiber as a Green and Recyclable Adsorbent for the Removal of Reactive Black 5 from the Aqueous Phase

Qureshi

Kim

Ahmed

et al. 2017

ACS Sustainable Chem. Eng.

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“…According to previous literatures, the residual Congo red concentration at different time intervals was determined using a UV-Vis spectrophotometer (Mapada Co., Ltd, China) at 498 nm. [30][31][32] The inuence of pH value, Congo red concentration and adsorption time were studied. The equilibrium adsorption amounts of composites were obtained using the following mass balance relationship:…”

Section: Adsorption and Regeneration Proceduresmentioning

confidence: 99%

Preparation of gemini surfactant/graphene oxide composites and their superior performance for Congo red adsorption

Liu

Yan

et al. 2019

RSC Adv.

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“…The utilization of pumice mainly is for structural applications such as aggregate in lightweight concrete, cement and filters. However, nowadays, pumice also has been used as an adsorbent for pollutant removal from water and wastewater [17]. The natural and modified 2 of 8 pumice were explored to be a better adsorbent for organic and inorganic water pollutants in recent years [18,25].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Physically and Chemically Modified Pumice on Removal of Cu(II) from Aqueous Solution

et al. 2022

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Modification by physical and chemical treatments was evaluated to increase the adsorption capability of natural pumice in the removal of Cu(II) from aqueous solution. The treatments were heating at temperatures of 300, 450 and 600 ℃ for physical and soaking in acid solutions (HCl, H2SO4 and HNO3) for chemical treatment. The adsorption was performed in the batch system at the optimum condition (5 of pH solution, < 63 µm of adsorbent diameter, 3 g/L of adsorbent dose, 5 mg/L of Cu(II) concentration and 30 min of contact time). The results showed the removal efficiency and Cu(II) uptake increased using modified pumice from 71.19 % and 1.19 mg/g to 84.45 % and 1.41 mg/g. The highest removal efficiency and Cu(II) uptake were obtained from 300℃ of heating temperature and HCl for the acid solution. The application of physical and chemical treatments in modification has the potential to increase the removal efficiency and heavy metal uptake of the natural pumice. HIGHLIGHTS Various methods have been evaluated for the modification of pumice to improve their sorption capacity Physical and chemical treatment to pumice may modify the surface areas, pore structures, and chemical functional group on the surface of the pumice GRAPHICAL ABSTRACT

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Evaluation of natural and cationic surfactant modified pumice for congo red removal in batch mode: Kinetic, equilibrium, and thermodynamic studies

Cited by 173 publications

References 62 publications

Electrospun Zein Nanofiber as a Green and Recyclable Adsorbent for the Removal of Reactive Black 5 from the Aqueous Phase

Electrospun Zein Nanofiber as a Green and Recyclable Adsorbent for the Removal of Reactive Black 5 from the Aqueous Phase

Preparation of gemini surfactant/graphene oxide composites and their superior performance for Congo red adsorption

Performance Evaluation of Physically and Chemically Modified Pumice on Removal of Cu(II) from Aqueous Solution

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