Sorption of Hg(II) and Pb(II) Ions on Chitosan-Iron(III) from Aqueous Solutions: Single and Binary Systems

Lapo, Byron; Demey, Hary; Zapata, Jessenia Melissa Zapata; Romero, Cristhian; Sastre, Ana Marı́a

doi:10.3390/polym10040367

Cited by 34 publications

(32 citation statements)

References 55 publications

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“…This can inhibit the oxidation of wine constituents, including phenolics, certain metals, tyrosine, and aldehydes, during the winemaking process, while retaining the sensory and nutritional value of wine. Furthermore, as previously reported, adding COS-based materials can reduce the concentrations of metals, such as boron, lead, mercury, and antimony, and that of ochratoxin A in process water [24][25][26][27], which can markedly improve wine quality. Therefore, in this study, COS was applied as an alternative to SO 2 in winemaking, and the antimicrobial activity of COS during winemaking was investigated using our own separated contaminated organisms and known wine spoilage organisms in comparison with the action of SO 2 .…”

Section: Introductionsupporting

confidence: 59%

Chitooligosaccharide as A Possible Replacement for Sulfur Dioxide in Winemaking

et al. 2020

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Sulfur dioxide (SO2) has been used for centuries as a preservative in winemaking. However, the addition of SO2 is associated with allergic reactions and can negatively affect wine quality. In our work, chitooligosaccharide (COS) was applied as an alternative to SO2 in winemaking, and its antimicrobial activity during winemaking was investigated in comparison with the action of SO2. The optimal concentration of COS was identified as 500 mg/L. The antimicrobial effect of COS was evaluated using known and our own separated wine spoilage organisms. The antimicrobial effect of 500 mg/L COS was found to be comparable with that of 100 mg/L SO2. Furthermore, using 500 mg/L COS as an additive during winemaking did notinfluence the cell growth of Saccharomyces cerevisiae. Therefore, COS can be used as an additive in winemaking.

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Section: Introductionsupporting

confidence: 59%

Chitooligosaccharide as A Possible Replacement for Sulfur Dioxide in Winemaking

et al. 2020

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“…Obtained materials extracted 80%-99% of the dye in a pH range from 3 to 10. Lapo et al [27] studied the Hg(II) and Pb(II) removal in single and binary component systems into chitosan-iron(III) biocomposite beads. The sorbent material has more affinity to Hg(II) rather than Pb(II) ions, the maximum sorption capacities were 1.8 and 0.56 mmol/g for Hg(II) and Pb(II), respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Modification by Carbonization of Styrene–Ethylene Glycol Dimethacrylate–Lignin Sorbents and their Sorption of Acetylsalicylic Acid

et al. 2020

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This paper deals with the synthesis and studies of new polymer microspheres properties based on ethylene glycol dimethylacrylate (EGDMA), styrene (St), and various quantities of commercial kraft lignin (L). In the first stage of the investigations, the conditions of the synthesis process were optimized by selecting a proper amount of poly (vinyl alcohol), which was a suspension stabilizer. Next, based on EGDMA + St + L, new polymers were synthesized by the suspension polymerization method. The chemical structure of the materials was confirmed by means of the Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) analysis. The evaluation of the synthesized materials includes susceptibility to swelling in solvents of different character (polar and nonpolar), porous structure of microspheres, and their thermal resistance. Morphology has been specified by the scanning electron microscope and automated particle size, as well as shape analyzer. The obtained pictures confirmed the spherical shape of the materials. The microspheres porosity was characterized using the low-temperature nitrogen adsorption. To increase the porosity (partially blocked by the large lignin molecule), the microspheres (EGDMA + St + 4L copolymer) were impregnated with the aqueous solution of the activating substance (sulphuric acid, nitric acid, phosphorous acid, and silver nitrate) and then carbonized at 400 • C. After the carbonization process, the increase in the specific surface area was observed. The microspheres were porous with a specific surface area up to 300 m 2 /g. The materials had a desirable feature for their potential use in chromatography, which was confirmed by the results of GC analysis with the acetylsalicylic acid. These materials are an interesting alternative in the field of more environmentally friendly, ecological, and biodegradable polymeric sorbents in comparison to the commonly applied styrene-divinylbenzene (St-DVB) copolymers.

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“…The 4-aminoantipyrine-GO adsorbent was compared in terms of adsorption capacity with some recently reported adsorbents. It clears that, in terms of adsorption capacity, the proposed sorbent compares favorably with other adsorbents and its adsorption capacity is high compared to other adsorbents (Table 4) [70][71][72][73][74][75][76][77][78][79][80][81][82].…”

Section: Comparison Of Adsorption Behaviour Based On Literature Datamentioning

confidence: 99%

A New Modified Exfoliated Graphene Oxide for Removal of Copper(ii), Lead(ii) and Nickel(ii) Ions From Aqueous Solutions

et al. 2019

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A N effective and facial method for removal of lead(II), copper(II) and Nickel(II) ions from aqueous solutions, is based on investigating a new modified graphene oxide, by appealing interaction between graphene oxide GO and 4-amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5one(4-aminoantipyrine). The adsorbent is fully characterized by FT-IR, XRD, SEM, EDX, TEM, and Raman spectroscopy. The GO was prepared using a modified Hummers method by the reaction of potassium permanganate with graphite in presence of a mixture of sulfuric and phosphoric acids. This novel solid phase adsorbent 4-aminoantipyrine-GO was utilized to adsorb Pb(II), Cu(II) and Ni(II) ions from aqueous solutions because of amide functional group, is resulting an efficient adsorption. Also the abundant oxygen-containing functional groups on the surfaces of graphene oxide GO play an important role in metal ions sorption. The adsorption isotherms data were well fitted with Langmuir isotherm for Pb(II), Cu(II) and Freundlich isotherm for Ni(II) ions respectively. The kinetics of Pb(II), Cu(II) and Ni(II) ions adsorption were well fitted with pseudo second-order equation. The results of thermodynamic parameters referred to chemical adsorption. Also the positive values of standard heat of adsorption (ΔH o ) and negative values of (ΔG o ) indicated that the adsorption process was endothermic and spontaneous.A.F. SHAABAN et al. based substance, has attractive properties because it has high mechanical strength (more than 1060 GPa), large specific surface area (nearly 2600 m 2 /g), and riching in oxygenous functional groups (carboxyl, epoxy, and hydroxyl groups) [22][23][24][25]. GO is an efficient adsorbent for heavy metal ions [26][27][28][29], humic acid [30], radionuclides [31][32][33][34], organic dyes [35,36], ammonia [37]. due to its good dispersion in water, biocompatibility, and relatively easy and cost effective preparation methods [38,39]. Therefore, functionalization of GO with molecules containing strong chelating groups such as nitrogen and thiol can significantly enhance its removal efficiency [40][41][42][43].The present work aims to: (I) preparing of GO nano sheets by improved hummers method from graphite; (II) preparing of acylchloride of graphene oxide nano sheets GO-Cl; (III) functionalization of 4-aminoantipyrine onto GO-Cl for adsorption of Pb(II), Cu(II) and Ni(II) ions from aqueous solutions; (IV) Characterization of all the above synthesized substances by FT-IR, XRD, SEM with EDX, TEM, and Raman spectroscopy; (V) A study of Langmuir and Freundlich adsorption isotherms also the adsorption kinetics and thermodynamic parameters of Pb(II), Cu(II) and Ni(II) ions adsorption from aqueous solutions onto the new functionalized graphene oxide 4-aminoantipyrine-GO; (VI)Regeneration and recycling studies of loaded 4-aminoantipyrine -GO.

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Sorption of Hg(II) and Pb(II) Ions on Chitosan-Iron(III) from Aqueous Solutions: Single and Binary Systems

Cited by 34 publications

References 55 publications

Chitooligosaccharide as A Possible Replacement for Sulfur Dioxide in Winemaking

Chitooligosaccharide as A Possible Replacement for Sulfur Dioxide in Winemaking

Synthesis and Modification by Carbonization of Styrene–Ethylene Glycol Dimethacrylate–Lignin Sorbents and their Sorption of Acetylsalicylic Acid

A New Modified Exfoliated Graphene Oxide for Removal of Copper(ii), Lead(ii) and Nickel(ii) Ions From Aqueous Solutions

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