Hydrogels produced from natural polymers: a review on its use and employment in water treatment

Resende, Jayana Freitas; Reck, Isabela Maria; Vieira, Marcelo Fernandes; Vieira, Angélica Marquetotti Salcedo

doi:10.1007/s43153-022-00224-8

Cited by 21 publications

(13 citation statements)

References 124 publications

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“…The thermodynamic equilibrium constants (K d ) of the adsorption of RB5 were calculated for the temperature according to Lyubchik et al [23] by plotting ln (q eq /c eq ) versus q eq and q eq extrapolating to zero. Then, the thermodynamic parameters were calculated, where the Gibbs free energy (ΔG ) was determined using Equation (10) and the enthalpy (ΔH ) and entropy variations (ΔS ) were calculated from the slope and the intercept point making graphics ln K d versus 1/T using Equation (11).…”

Section: Adsorption Energiesmentioning

confidence: 99%

“…[10] These properties make hydrogels an intelligent material for water remediation and can be explored in the adsorption field for the removal of ionic impurities and recalcitrant organic dyes. [11] Another major advantage of hydrogels is that they can be synthesized from natural polymers, such as proteins. [12] Many studies show that the proteins extracted from the moringa seeds have high coagulant power, [4] but when using them as a coagulant, sludge is generated, which is an environmental problem.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of hydrogels from fractionated proteins of Moringa oleifera Lam. seeds for the treatment of water contaminated with black reactive dye 5

Freitas Resende,

Reck Paulino,

dos Reis Oliveira

et al. 2023

Can J Chem Eng

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As has been portrayed in the literature, the main proteins extracted from the seeds of Moringa oleifera Lam. have coagulant and clarifying potential in water treatment. However, when using them as coagulant agents, sludge formation occurs, which is an environmental problem. Thus, it was proposed to synthesize hydrogels from the main Moringa seeds proteins and use them as adsorbents. This work aimed to synthesize albumin hydrogels and globulin hydrogels and evaluate their efficiency as adsorbents to remove the reactive black 5 dye. Through FTIR spectrum it was possible to confirm that the synthesis of hydrogels occurred successfully. The kinetic data fit the pseudo‐second order model for both hydrogels. The equilibrium isotherms showed that adsorption occurs in multilayers, due to Freundlich fitting. The maximum adsorption capacity occurred at 298 K and was 1.19 mg g−1 for the albumin hydrogel and 10.06 mg g−1 for the globulin hydrogel. Through the results it is possible to state that globulin hydrogel was more favourable for adsorption since it has a more porous morphology and requires less mass compared to albumin hydrogel.

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Section: Adsorption Energiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of hydrogels from fractionated proteins of Moringa oleifera Lam. seeds for the treatment of water contaminated with black reactive dye 5

Freitas Resende,

Reck Paulino,

dos Reis Oliveira

et al. 2023

Can J Chem Eng

Self Cite

View full text Add to dashboard Cite

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“…The shapes and sizes are determined based on the 3D modeling results of the aneurysms from preoperative imaging analysis. Compared to the natural hydrogels with high water content and photocurable hydrogels, [32][33][34][35][36][37] the proposed organogel overcomes the problem of fragility and brittleness, with improved modulus/strength from kilopascal level to megapascal level, which reduces the possibility of microcoil's fracture during embolization. Meanwhile, compared to alginate (a typical type of shear-thinning hydrogel), the adhesion between the proposed organogel and the vessel tissue is also enhanced to about three times higher (Section 1, Supporting Information).…”

Section: Introductionmentioning

confidence: 99%

Preshaped 4D Photocurable Ultratough Organogel Microcoils for Personalized Endovascular Embolization

Wang,

Qiu,

Liu

et al. 2023

Advanced Materials

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Endovascular embolization using microcoils can be an effective technique to treat artery aneurysms. However, microcoils with fixed designs are difficult to adapt to all aneurysm types. In this paper, we have proposed a photocurable ultra‐tough shape memory organogel with a curing time of only 2 s and megapascal‐level mechanical properties. Then, we used it to manufacture the personalized 4D microcoil with a wire diameter of only 0.3 mm. The improved mechanical modulus (511.63 MPa) could reduce the possibility of microcoils’ fracture during embolization. Besides, the fast body‐temperature‐triggering shape memory ability makes the 4D microcoil applicable in vivo. These 4D microcoils were finally delivered into the rabbit, and successfully blocked the blood flow inside different aneurysms, with neoendothelial cells and collagen fibers growing on the microcoil surface snugly, indicating full aneurysm recovery. This 4D organogel microcoil could potentially be used in personalized clinical translation on human beings.This article is protected by copyright. All rights reserved

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“…The hydrogels of polymers based on acrylamide (PAAm), have been studied for a considerable number of applications. Some of these applications include drug delivery (22)(23)(24)(25), systems of concentration against gradient (26), water remediation (27,28), etc. However, these hydrogels are usually modified to provide different properties, such as a specific response to external stimuli, better mechanical properties or better biocompatibility, between others (29).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of poly(acrylamide-co-methyl methacrylate) chemicaly cross-linked hydrogels for efficient adsorption of red erionyl dye

et al. 2022

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Polyacrylamide (Poly (AAm)) and poly(acrylamide-co-methyl methacrylate) (poly (AAm-co-MMA)) hydrogels were synthesized by solution free radical polymerization initiated by Potassium persulfate initiator (KPS) at different feed mol monomer ratios and N,N-methylene bisacrylamide (BIS) as a crosslinking agent. The obtained hydrogels were characterized by FTIR, scanning electron microscopy (SEM) and swelling behaviour. The swelling properties of Poly (AAm) and poly (AAm-co-MMA) hydrogels were studied in distilled water at different pH. The effect of temperature on swelling behaviour of these hydrogels has been analysed by variation from 25 to 50?C. Poly(AAm-co-MMA) hydrogels were considered for the removal of Red Erionyl textile dyes from aqueous solutions. Two kinetics models were applied; the first and the second order kinetics as well as the Freundlich and Langmuir isotherms were tested. The result confirms that the adsorption process of Red Erionyl dye follows second-order kinetics and their equilibrium data were fitted well to the linear Langmuir model.

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Hydrogels produced from natural polymers: a review on its use and employment in water treatment

Cited by 21 publications

References 124 publications

Synthesis of hydrogels from fractionated proteins of Moringa oleifera Lam. seeds for the treatment of water contaminated with black reactive dye 5

Synthesis of hydrogels from fractionated proteins of Moringa oleifera Lam. seeds for the treatment of water contaminated with black reactive dye 5

Preshaped 4D Photocurable Ultratough Organogel Microcoils for Personalized Endovascular Embolization

Synthesis of poly(acrylamide-co-methyl methacrylate) chemicaly cross-linked hydrogels for efficient adsorption of red erionyl dye

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