Polysaccharide-based adsorbents prepared in ionic liquid with high performance for removing Pb(II) from aqueous systems

Rufato, Késsily B.; Almeida, Vitor C.; Kipper, Matt J.; Rubira, Adley F.; Martins, Alessandro F.; Muniz, Edvani C.

doi:10.1016/j.carbpol.2019.03.095

Cited by 32 publications

(6 citation statements)

References 31 publications

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Section: Resultssupporting

confidence: 87%

“…Figure 9, confirmed that the adsorption efficiency of CEP (95 and 79% for Pb(II) and Cd(II) after the first cycle) has been decreased to 86% for Pb(II) and 67% for Cd(II) after the fifth cycle. Similar results were reported by Rufato et al, [46] Ahmad and Mirza, [9] Zhang et al, [18] and Li et al [13] This property, cannot be improved after modification of chitosan using epichlohydrin and bidentate ligand. MCS-ITMB Pb(II) 134.1 [37] m-CSPIB Pb(II) 104.16 [15] Chitosan/lignosulfonate Pb(II) 525 [18] Chitosan/nanofibrillated cellulose aerogel Pb(II) 252.6 [13] There is a competition between the interfacing ions such as Ca 2+ , Mg 2+ , Na + , K + , Cl À , NO 3 À , HCO 3 À and SO 4 2À with Pb(II) and Cd(II) for interaction to active sites of modified chitosan as sorbent.…”

Section: Removal Of Pb 2+ and CD 2+ Ionssupporting

confidence: 84%

“…In recent years, numerous researchers reported the removal of different heavy metal ions using Schiff base modified chitosan. [11,[15][16][17]24,37,38,[46][47][48] For example, salicylaldehyde functionalized chitosan nanoparticles (N-Ch-Sal) were prepared by Hussain et al [11] and used as an efficient sorbent for Pb(II), Cu(II), and Cd(II) ions. Yan et al [16] synthesized epichlorohydrin crosslinked chitosan Schiff base@Fe 3 O 4 (ECCSB@Fe 3 O 4 ) as sorbent of Pb(II) ion with a capacity value of 86.20 mg/g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions

Jasim

Hachem

Hussein³

et al. 2022

J Chinese Chemical Soc

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In this study, modified chitosan with epichlohydrin and bidentate Schiff base ligand (CEP) was successfully synthesized and characterized using Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), X-ray powderdiffraction (XRD), and scanning electron microscopy (SEM). In addition, its removal ability of Pb 2+ and Cd 2+ ions was studied and the effect of various parameters such as pH solution, sorbent dose, and contact time on the adsorption of Pb 2+ and Cd 2+ ions were investigated and optimized. At optimal conditions (pH of 5, contact time of 90 min, 40 ppm of Pb 2+ , Cd 2+ concentration, and 0.02 g of CEP), the maximum removal percentage of Pb 2+ and Cd 2+ ions was found to be 95 and 79%, respectively. The adsorption process followed the second-order kinetic model for Pb(II) and the first-order kinetic model for Cd(II). In addition, the effect of interface ions was investigated and it was found that the presence of divalent cations only affected the adsorption of Pb(II) and Cd(II) using CEP. Finally, the CEP adsorbent has undergone five regeneration experiments and adsorption efficiency was reduced by about 9 and 12% for Pb(II) and Cd(II) ions, respectively. Results show that the CEP has great potential for the removal of other heavy metal ions as a facile, eco-friendly, and low-cost adsorbent.

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Section: Resultssupporting

confidence: 87%

Section: Removal Of Pb 2+ and CD 2+ Ionssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions

Jasim

Hachem

Hussein³

et al. 2022

J Chinese Chemical Soc

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“…[ 44 ] As seen in Figure 10, after 5 adsorption–desorption cycles, the maximum of removal Pb(II) and Cd(II) ions remained 88 and 72%, respectively, indicating that the ChS@Fe 2 O 3 is well adsorbent for Pb(II) and could be used repeatedly. [ 43,44,46,49 ]…”

Section: Resultsmentioning

confidence: 99%

Retracted: Adsorption of Pb(II) and Cd(II) by magnetic chitosan‐salicylaldehyde Schiff base: Synthesis, characterization, thermal study and antibacterial activity

Hachem

Jasim

Al‐Gazally

et al. 2022

J Chinese Chemical Soc

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In this paper, new magnetic chitosan‐salicylaldehyde Schiff base (ChS@Fe2O3) was prepared and characterized by FT‐IR, DSC, XRD, VSM and SEM and utilized as an efficient sorbent for the removal of Pb(II) and Cd(II) ions from aqueous solution. Moreover, the effect of solution pH, Pb(II) and Cd(II) initial concentration, adsorbent dosage and contact time on the adsorption process was examined thoroughly and optimized. Also, the adsorbent reusability and adsorption mechanism were studied. The sorption capacity of Pb(II) and Cd(II) ions at optimum condition was found to be 135.8 and 114.8 mg/g, respectively. The adsorption efficiency of ChS@Fe2O3 remained above 88 and 72%, respectively for Pb(II) and Cd(II) ions. Finally, antibacterial activities evaluation of ChS@Fe2O3 were conducted against S. aureus, B. cereus, E. coli and P. aeruginosa bacteria strains. The results exhibited the high activity against all bacteria strains.

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“…These unique qualities lead to a wide range of applications including alginate's use in nanoparticles, nanotubes, microspheres, microcapsules, sponges, hydrogels, foams, elastomers and fibers [118][119][120][121][122][123][124][125][126][127][128]. Recently, IL has been used to dissolve alginates with other biopolymers to form stable biomaterials [129,130].…”

Section: Alginatementioning

confidence: 99%

Protein and Polysaccharide-Based Fiber Materials Generated from Ionic Liquids: A Review

et al. 2020

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Natural biomacromolecules such as structural proteins and polysaccharides are composed of the basic building blocks of life: amino acids and carbohydrates. Understanding their molecular structure, self-assembly and interaction in solvents such as ionic liquids (ILs) is critical for unleashing a flora of new materials, revolutionizing the way we fabricate multi-structural and multi-functional systems with tunable physicochemical properties. Ionic liquids are superior to organic solvents because they do not produce unwanted by-products and are considered green substitutes because of their reusability. In addition, they will significantly improve the miscibility of biopolymers with other materials while maintaining the mechanical properties of the biopolymer in the final product. Understanding and controlling the physicochemical properties of biopolymers in ionic liquids matrices will be crucial for progress leading to the ability to fabricate robust multi-level structural 1D fiber materials. It will also help to predict the relationship between fiber conformation and protein secondary structures or carbohydrate crystallinity, thus creating potential applications for cell growth signaling, ionic conductivity, liquid diffusion and thermal conductivity, and several applications in biomedicine and environmental science. This will also enable the regeneration of biopolymer composite fiber materials with useful functionalities and customizable options critical for additive manufacturing. The specific capabilities of these fiber materials have been shown to vary based on their fabrication methods including electrospinning and post-treatments. This review serves to provide basic knowledge of these commonly utilized protein and polysaccharide biopolymers and their fiber fabrication methods from various ionic liquids, as well as the effect of post-treatments on these fiber materials and their applications in biomedical and pharmaceutical research, wound healing, environmental filters and sustainable and green chemistry research.

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Polysaccharide-based adsorbents prepared in ionic liquid with high performance for removing Pb(II) from aqueous systems

Cited by 32 publications

References 31 publications

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions

Retracted: Adsorption of Pb(II) and Cd(II) by magnetic chitosan‐salicylaldehyde Schiff base: Synthesis, characterization, thermal study and antibacterial activity

Protein and Polysaccharide-Based Fiber Materials Generated from Ionic Liquids: A Review

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Polysaccharide-based adsorbents prepared in ionic liquid with high performance for removing Pb(II) from aqueous systems

Cited by 32 publications

References 31 publications

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb2+ and Cd2+ ions

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb2+ and Cd2+ ions

Retracted: Adsorption of Pb(II) and Cd(II) by magnetic chitosan‐salicylaldehyde Schiff base: Synthesis, characterization, thermal study and antibacterial activity

Protein and Polysaccharide-Based Fiber Materials Generated from Ionic Liquids: A Review

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Product

Resources

About

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions

New chitosan modified with epichlohydrin and bidentate Schiff base applied to removal of Pb²⁺ and Cd²⁺ ions