Removal of heavy metal using poly (N-vinylimidazole)-grafted-carboxymethylated starch

El‐Hamshary, Hany; Fouda, Moustafa M.G.; Moydeen, Meera; Al‐Deyab, Salem S.

doi:10.1016/j.ijbiomac.2014.02.047

Cited by 49 publications

(24 citation statements)

References 28 publications

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“…44 Amine coatings, such as N-vinyl-imidazole offer a promising functionality known for having a strong affinity with metals such as silver, which can potentially introduce antimicrobial property and possible metal selectivity properties for metal contaminated wastewater separation. [45][46] In this work, the active PA layer of a commercial TFC membrane was directly functionalized with amine moieties by plasma polymerization of 1-vinyl-imidazole (VIm) monomers. The resulting amine enrichment presents a versatile platform for further functional modifications 6 including attachment of silver nano-particles (Ag NPs), conferring measurable antimicrobial activity.…”

Section: Introductionmentioning

confidence: 99%

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Reis

Dumée

et al. 2015

ACS Appl. Mater. Interfaces

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Thin-film composite membranes, primarily based on poly(amide) (PA) semipermeable materials, are nowadays the dominant technology used in pressure driven water desalination systems. Despite offering superior water permeation and salt selectivity, their surface properties, such as their charge and roughness, cannot be extensively tuned due to the intrinsic fabrication process of the membranes by interfacial polymerization. The alteration of these properties would lead to a better control of the materials surface zeta potential, which is critical to finely tune selectivity and enhance the membrane materials stability when exposed to complex industrial waste streams. Low pressure plasma was employed to introduce amine functionalities onto the PA surface of commercially available thin-film composite (TFC) membranes. Morphological changes after plasma polymerization were analyzed by SEM and AFM, and average surface roughness decreased by 29%. Amine enrichment provided isoelectric point changes from pH 3.7 to 5.2 for 5 to 15 min of plasma polymerization time. Synchrotron FTIR mappings of the amine-modified surface indicated the addition of a discrete 60 nm film to the PA layer. Furthermore, metal affinity was confirmed by the enhanced binding of silver to the modified surface, supported by an increased antimicrobial functionality with demonstrable elimination of E. coli growth. Essential salt rejection was shown minimally compromised for faster polymerization processes. Plasma polymerization is therefore a viable route to producing functional amine enriched thin-film composite PA membrane surfaces.

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Section: Introductionmentioning

confidence: 99%

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Reis

Dumée

et al. 2015

ACS Appl. Mater. Interfaces

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“…Starch, one of the most abundant renewable resources in the world has been investigated as an adsorbent to remove water pollutants [18][19][20][21]. For instance, Guo et al [22] synthesized a crosslinked porous starch and found that its adsorption capacity of product for methylene blue (MB) can reach 9.46 mg g −1 , which was much higher than that of native starch.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of magnetic carboxymethyl starch/poly(vinyl alcohol) composite gel for methylene blue removal

Gong

Zhang

Cheng

et al. 2015

International Journal of Biological Macromolecules

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“…To evaluate the sorption capacities of the hydrogel for the three metals, the adsorption data were fitted to the linear form of the Freundlich and Langmuir isotherm equations ( Figure ), respectively written as: Log q e = Log K F + (1/ n )Log C f and C f / q e = 1/( K L Q max ) + C f / Q max in which C f is the final metal concentration, q e is the amount of metal adsorbed by the hydrogel, K F is the Freundlich adsorption capacity (L 1/ n mg (1 ‐ 1/ n ) /g), 1/ n is the adsorption intensity, Q max is the maximum adsorption capacity (mg/g), and K L is the Langmuir adsorption coefficient (L mg −1 ) . The isotherm parameters and their corresponding coefficient of determinations, R 2 , are presented in Table .…”

Section: Resultsmentioning

confidence: 99%

Eco‐Friendly Synthesis of Hydrogels from Starch, Citric Acid, and Itaconic Acid: Swelling Capacity and Metal Chelation Properties

et al. 2020

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In this study, eco‐friendly superabsorbent hydrogels are prepared by the grafting and crosslinking reactions of itaconic acid and citric acid with starch, using potassium persulfate as the free radical initiator. The structure and morphology of the hydrogels are studied using Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. The effect of the citric acid to starch ratio on the swelling properties is evaluated, and it is found that equal parts of citric acid and starch produced the highest swelling ratio of 188 g distilled water per g hydrogel. The hydrogels also exhibit pH‐dependent behavior, such that the maximum swelling ratio of 232 g/g is obtained at pH 8. Finally, the metal chelation properties of the hydrogel are tested in solutions of copper, nickel, and zinc, and the adsorption capacity followed the trend Cu > Ni > Zn based on the Freundlich parameter KF.

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Removal of heavy metal using poly (N-vinylimidazole)-grafted-carboxymethylated starch

Cited by 49 publications

References 28 publications

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Facile fabrication of magnetic carboxymethyl starch/poly(vinyl alcohol) composite gel for methylene blue removal

Eco‐Friendly Synthesis of Hydrogels from Starch, Citric Acid, and Itaconic Acid: Swelling Capacity and Metal Chelation Properties

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