Adsorption of tannic acid from aqueous solution onto chitosan/NaOH/fly ash composites: Equilibrium, kinetics, thermodynamics and modeling

Agarwal, Swarnima; Rajoria, Priyanka; Rani, Ashu

doi:10.1016/j.jece.2017.11.075

Cited by 57 publications

(8 citation statements)

References 55 publications

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“…To better demonstrate the excellent adsorption properties of HP-MIL-101, a more comprehensive comparison of the rate constant and adsorption capacity for the removal of TA with other materials reported in the literature is given in Table 3. 32,[37][38][39][40][41][42][43][44] It can be clearly seen that HP-MIL-101-30 displays a much higher adsorption rate than most reported materials at the same or even lower adsorbent dosage/TA concentration.…”

Section: Ta Adsorption Performancementioning

confidence: 86%

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

et al. 2021

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Metal-organic frameworks (MOFs) have attracted much attention owing to their tailored pore environment and surface functionality. However, most of the currently reported MOFs are confined to small pore sizes (<5 nm), limiting their practical applications. Here, a facile and versatile strategy for rapid construction of hierarchically porous MOFs (HP-MOFs) by spray-drying is reported, in which presynthesized nanosized MOFs (N-MOFs) can be assembled to form MOF microspheres with meso/macropores resulting from the interspace among closely arranged N-MOFs. This strategy enables the construction of multicomponent HP-MOFs with various functions. As a proof of concept, we show that the adsorption for tannic acid (TA) can be significantly enhanced using HP-MIL-101(Cr). Particularly, HP-MIL-101-30 (30 represents the primary nanoparticle size) exhibits a record-high adsorption capacity (1175 mg g À1 ), and the adsorption rate of HP-MIL-101-30 is increased by 50% compared to that of N-MIL-101-30. These findings have important implications for the rapid construction of HP-MOFs, which is beneficial for the adsorption of large molecules.

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Section: Ta Adsorption Performancementioning

confidence: 86%

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

et al. 2021

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“…Tannic acid (TA) is a natural glycoside polymer of gallic acid derived from the decomposition of plant biomass. The presence of [ 16 ] multiple hydroxyl and phenolic hydroxyl groups (i.e., from catechol and gallic moieties) makes TA suitable for good binding with organic/inorganic/metallic surfaces by covalent and/or non-covalent bond interactions, as well as for the coordination of several metal ions (Cu 2+ , Fe 3+ , Mn 2+ ), even in physiological conditions [ 17 , 18 ]. Moreover, TA appears proper for conjugation with an inorganic phase, which is proved to be effective in boosting the intrinsic properties of the organic phase, tuning bio-polymeric supramolecular structures [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Silica Meets Tannic Acid: Designing Green Nanoplatforms for Environment Preservation

et al. 2022

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Hybrid tannic acid-silica-based porous nanoparticles, TA-SiO2 NPs, have been synthesized under mild conditions in the presence of green and renewable tannic acid biopolymer, a glycoside polymer of gallic acid present in a large part of plants. Tannic acid (TA) was exploited as both a structuring directing agent and green chelating site for heavy metal ions recovery from aqueous solutions. Particles morphologies and porosity were easily tuned by varying the TA initial amount. The sample produced with the largest TA amount showed a specific surface area an order of magnitude larger than silica nanoparticles. The adsorption performance was investigated by using TA-5SiO2 NPs as adsorbents for copper (II) ions from an aqueous solution. The effects of the initial Cu2+ ions concentration and the pH values on the adsorption capability were also investigated. The resulting TA-SiO2 NPs exhibited a different adsorption behaviour towards Cu2+, which was demonstrated through different tests. The largest adsorption (i.e., ~50 wt% of the initial Cu2+ amount) was obtained with the more porous nanoplatforms bearing a higher final TA content. The TA-nanoplatforms, stable in pH value around neutral conditions, can be easily produced and their use would well comply with a green strategy to reduce wastewater pollution.

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“…Treating waste with waste is an ingenious idea in environmental pollution alleviation. Fly ash exhibits considerable thermal stability and excellent properties, which has been used in adsorption, [10] for example, NaOH‐modified Coal fly ash, Chitosan/NaOH/fly ash composite, Chitosan/fly ash [11–14] . Magnetic fly ash beads (MFAs) are aluminosilicate glass beads with high iron oxide content in fly ash and can be obtained by magnetic separation [15] .…”

Section: Introductionmentioning

confidence: 99%

“…Fly ash exhibits considerable thermal stability and excellent properties, which has been used in adsorption, [10] for example, NaOH-modified Coal fly ash, Chitosan/NaOH/fly ash composite, Chitosan/fly ash. [11][12][13][14] Magnetic fly ash beads (MFAs) are aluminosilicate glass beads with high iron oxide content in fly ash and can be obtained by magnetic separation. [15] Fly ash beads rich in iron oxide exhibit a magnetic property superior to that of ordinary fly ash, facilitating recycling.…”

Section: Introductionmentioning

confidence: 99%

Carbon‐Coated Magnetic Fly Ash Modified with Guanylthiourea and Polydopamine for Simultaneous Removal of Cu(II) and Pb(II) in Acidic Aqueous Solutions

et al. 2021

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A magnetic adsorbent simultaneously adsorbing heavy metal ions in acidic solution was prepared by carbon‐deposited magnetic fly ash (C‐MFA), polydopamine (PDA) coating, and guanylthiourea grafting. The prepared guanylthiourea‐grafted PDA/carbon‐coated magnetic fly ash beads (GPC‐MFA) were characterized by SEM, FTIR, Raman spectroscopy, XRD, XPS, TG‐DSC, surface potential, and vibrating‐sample magnetometry. The results indicated that dopamine‐coated carbon‐deposited fly ash surface was successfully grafted with guanylthiourea. The maximum adsorption capacity fitted by Langmuir model for GPC‐MFA were 50.09 mg/g for Cu(II) and 30.64 mg/g for Pb(II) at 40 °C and pH 3.0, respectively. The pseudo‐second order kinetic model accurately fits the kinetic data of Cu(II) adsorption, hence the adsorption properties mainly involves chemical adsorption. Mechanistic studies show that GPC‐MFA contains uniform groups and has strong coordination with heavy metal ions. GPC‐MFA exhibited high recyclability. After 5 recycles of adsorption‐desorption, the adsorption capacity of GPC‐MFA for Cu(II) and Pb(II) still reached 88.72 % and 86.21 % compared with the fresh adsorbent.

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Adsorption of tannic acid from aqueous solution onto chitosan/NaOH/fly ash composites: Equilibrium, kinetics, thermodynamics and modeling

Cited by 57 publications

References 55 publications

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

Rapid construction of hierarchically porous metal–organic frameworks by a spray‐drying strategy for enhanced tannic acid adsorption

Silica Meets Tannic Acid: Designing Green Nanoplatforms for Environment Preservation

Carbon‐Coated Magnetic Fly Ash Modified with Guanylthiourea and Polydopamine for Simultaneous Removal of Cu(II) and Pb(II) in Acidic Aqueous Solutions

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