Novel aspartic-based bio-MOF adsorbent for effective anionic dye decontamination from polluted water

Salama, Eslam; Ghanim, Mohamed; Shokry, Hassan; Amer, Wael A.; Ebeid, El-Zeiny M.; El-Shazly, A.H.; Ossman, M.E.; Elkady, M.F.

doi:10.1039/d2ra02333d

Cited by 14 publications

(13 citation statements)

References 46 publications

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“…According to these data, the prepared nano-SiO 2 elucidated excellent thermal characteristics compared with other nanomaterials [26], [41], [42].…”

Section: Instruments and Analytical Methodsmentioning

confidence: 89%

“…Both series consisted of ve sequential experiments to investigate the in uence of several operational parameters on the adsorption e ciency including contact time (0-180 min), initial pH (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11), nano-SiO 2 dose (0.1-8 g L − 1 ), initial heavy metals concentration (5-100 mg L − 1 ), and temperature (room temperature-85°C), respectively. These values have been selected according to the different standard values used in most of the former studies [24], [25]. In the beginning, single-metal stock solutions (individual metal) of Pb (II), and Cr (VI) with the chosen concentrations were prepared by dissolving lead nitrate; Pb(NO 3 ) 2 , and potassium dichromate (K 2 Cr 2 O 7 ) in distilled water; then, stock solutions were kept in volumetric asks in dark at 4°C, and the experimental work was designed as follows.…”

Section: Experimental Design and Proceduresmentioning

confidence: 99%

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Synthesis of nano-silica oxide for heavy metals decontamination from aqueous solutions

Soliman

Salama

Elsayed

et al. 2023

Preprint

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In the current study, nano-silica oxide (nano-SiO2) was fabricated via the sol-gel technique. Then, the prepared nano-SiO2 was characterized using X-ray diffractometer (XRD), transmission electron microscopy (TEM) coupled with energy-dispersive X-ray spectroscopy (EDS), Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller. Furthermore, the fabricated nano-SiO2 was applied for the adsorption of lead Pb (II) and chromium Cr (VI) from aqueous solutions. Additionally, the influence of different operating factors such as contact time, nano-SiO2 dose, initial pH, initial metal ions concentration, and the temperature was investigated. The nano-SiO2 dosages of 0.5 and 1 g L-1 were selected as the optimal adsorbent dose for the removal of Pb (II) and Cr (VI), respectively. These doses achieved a removal efficiency of 83.29% and 78.65% for Pb (II) and Cr (VI), after 60 and 90 min, respectively, (at initial pH values of 7, using 10 mg L-1 initial metals concentration, and at room temperature). Lastly, kinetic and equilibrium studies were competently fitted using the pseudo-second-order and Freundlich models, respectively. Adsorption thermodynamic studies designate the spontaneous and thermodynamic of the adsorption processes nature. These results reveal the efficiency of the fabricated nano-SiO2 as an adsorbent for heavy metals removal from aqueous solutions.

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“…According to these data, the prepared nano-SiO 2 elucidated excellent thermal characteristics compared with other nanomaterials [26], [41], [42].…”

Section: Instruments and Analytical Methodsmentioning

confidence: 89%

Section: Experimental Design and Proceduresmentioning

confidence: 99%

Synthesis of nano-silica oxide for heavy metals decontamination from aqueous solutions

Soliman

Salama

Elsayed

et al. 2023

Preprint

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“…41–43 Further, a stretching vibration of CCO can be noticed around 2300 cm −1 . The peaks at around 1600 cm −1 are due to the stretching vibration of carboxyl groups CO. 44–47 The three products own the same main functional groups due to their carbonic structures.…”

Section: Resultsmentioning

confidence: 99%

Catalytic fabrication of graphene, carbon spheres, and carbon nanotubes from plastic waste

Salama,

Mohamed,

Samy

et al. 2024

RSC Adv.

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“…It is a useful indicator of a membrane’s ability to filter out organic pollutants since it mimics such pollutants in terms of molecular size, charge, and water solubility. Similarly, the occurrence of the anionic dye DR-81 in many industrial effluents mirrors that of acidic or anionic pollutants from the textile, paper, and printing sectors . Its negative charge and relatively small size effectively simulate common effluent components, facilitating the evaluation of a membrane’s capacity to remove these prevalent contaminants.…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, the occurrence of the anionic dye DR-81 in many industrial effluents mirrors that of acidic or anionic pollutants from the textile, paper, and printing sectors. 60 Its negative charge and relatively small size effectively simulate common effluent components, facilitating the evaluation of a membrane's capacity to remove these prevalent contaminants. Na 2 SO 4 , on the other hand, is a nondye constituent that represents the inorganic salts and ions typically found in natural water sources.…”

Section: Performance Of Graphene-based Membranes For Organic Dye and ...mentioning

confidence: 99%

Fabrication of Graphene-Based Nanofiltration Membrane from Fractionated Bamboo Lignin for Dye Removal and Desalination

Ahmad Farid,

Sabidi,

Ruozhu

et al. 2023

ACS Appl. Eng. Mater.

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The growing demand for sustainable and renewable materials has driven extensive research into the use of lignocellulosic biomass as a promising feedstock for the development of advanced biobased membranes. In this present work, we established the viability of producing greener lignin-derived graphene oxide (bGO) and reduced graphene oxide (brGO) membranes from bamboo biomass to fabricate an ordered two-dimensional (2D) laminar channel for nanofiltration. It is imperative to emphasize that our methodology is intricately designed as a sequential strategy for the synthesis of bGO and brGO. This meticulously orchestrated sequence encompasses graphitization followed by consecutive oxidation and reduction processes, all unfolding prior to the subsequent facile layer-by-layer deposition, a pivotal step in membrane fabrication. The as-prepared bGO and brGO membranes showed nanosize pore openings of 1.15 and 0.03 nm and water pathway lengths of 65.15 and 49.09 nm, respectively. Pronounce enhancement by 52-to 60-fold in water permeance was exhibited using the brGO membrane for rejection of organic dyes (methylene blue, MB; direct red 81, DR-81) and salt (sodium sulfate, Na 2 SO 4 ) solutions compared to lignin-derived graphene oxide (bGO) membrane while the rejections remained comparable at 88, 99, and 57.6% for Na 2 SO 4 , MB, and DR-81, respectively. The brGO membrane's remarkable mechanical stability was also proven in an ultrasound test, withstanding up to 2 h without swelling and hence resistant to disintegration under solution immersion conditions. This work provides insight into the fabrication of graphene-based membranes from biomass for highly efficient nanofiltration performance and sheds some light on the transport mechanism within 2D laminar channels.

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Novel aspartic-based bio-MOF adsorbent for effective anionic dye decontamination from polluted water

Abstract: In this study, a cost-effective powdered Zn l-aspartic acid bio-metal organic framework (Zn l-Asp bio-MOF) was reported as an efficient adsorbent for Direct Red 81 (DR-81) as an anionic organic dye.

Cited by 14 publications

References 46 publications

Synthesis of nano-silica oxide for heavy metals decontamination from aqueous solutions

Synthesis of nano-silica oxide for heavy metals decontamination from aqueous solutions

Catalytic fabrication of graphene, carbon spheres, and carbon nanotubes from plastic waste

Fabrication of Graphene-Based Nanofiltration Membrane from Fractionated Bamboo Lignin for Dye Removal and Desalination

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