Polyamidoamine‐Based Hydrogel for Removal of Blue and Red Dyes from Wastewater

Rizzi, Vito; Fiorini, Federica; Lamanna, Giuseppe; Gubitosa, Jennifer; Prasetyanto, Eko Adi; Fini, Paola; Fanelli, Fiorenza; Nacci, Angelo; Cola, Luisa De; Cosma, Pinalysa

doi:10.1002/adsu.201700146

Cited by 27 publications

(52 citation statements)

References 55 publications

(105 reference statements)

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“…The best adjustment for γ–CDs–EPI was achieved by using this model (0.946). This could be attributed to the adsorption happening onto heterogeneous surfaces [ 37 ]. The Temkin model demonstrated that the heat of adsorption decreased during the adsorption process [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

et al. 2020

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Two cyclodextrins (CDs), γ– and hydroxypropyl (HP)–γ–CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, particle size distribution and thermogravimetric analysis. Experimental data for both polymers were well fitted to the pseudo-second order and intraparticle diffusion model, indicating that in the adsorption both chemical and physical interactions are essential in the removal of DR. Three different isotherm models were analyzed, concluding that γ–CDs–EPI followed the Temkin isotherm and HP–γ–CDs-EPI the Freundlich isotherm, these results suggested that the adsorption was happening onto heterogeneous surfaces. The results of the Gibbs free energy showed that the adsorption was spontaneous at room temperature. In order to eliminate the remaining dye after the polymer treatment, and advanced oxidation process (AOP) was considered, achieving more than 90% of removal combining both mechanisms.

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Section: Resultsmentioning

confidence: 99%

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

et al. 2020

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“…The CH adsorption capacities were calculated as q t (mg∙g −1 ) at different contact times (t), by applying Equation (1) [13,14,16].…”

Section: Methodsmentioning

confidence: 99%

“…Information about the kinetics of the adsorption process between Kp and the chitosan film was inferred by adopting both pseudo first-order and pseudo second-order kinetic models. The following linearized equations for the pseudo first-order (Equation (2)) and pseudo second-order (Equation (3)) models were adopted [13,14,16]:ln(qe−qt)=ln(qe)−K1× t, tqt=1K2qe2+1qe× t, where q e and q t represent the adsorption capacities at equilibrium and at time t, respectively (mg∙g −1 ), and k 1 (min −1 ) and k 2 (g∙mg −1 ∙min −1 ) are the rate constants of the pseudo first-order and second-order models, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Chitosan has great potential for environmental applications [6], such as the remediation of organic and inorganic contaminants, including toxic metals and dyes in soil, sediment, and water [7,8,9,10], and for the development of devices [11,12]. Among pollutants [13,14], emerging contaminants, e.g., pesticides and their metabolites, pharmaceuticals, personal and house care products, life-style compounds, food additives, industrial products and waste, and nanomaterials, are a great and important problem for the environment. The cumulative use of these substances led to their relatively recent appearance in detectable levels in soils, as well as surface and groundwater resources, with unpredictable consequences for ecosystems [15].…”

Section: Introductionmentioning

confidence: 99%

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Chitosan Biopolymer from Crab Shell as Recyclable Film to Remove/Recover in Batch Ketoprofen from Water: Understanding the Factors Affecting the Adsorption Process

et al. 2019

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Seafood, a delight for many people, is sold in the market as a wide variety of products. However, seafood industries produce many by-products; for example, during the processing, the heads and shells of shellfish are generated as waste. This results in the generation of a large amount of shell waste that is accumulated over time, inducing a major environmental concern. Effective solutions for recycling shell waste should be taken into consideration, and the extraction of commercially useful substances like chitin and its derivates, such as chitosan, could be a valid solution for reducing the seafood waste’s environmental impact. Thus, during this work, we propose the use of chitosan as biowaste, to induce the formation of solid films useful for decontaminating water from emerging pollutants. In particular, ketoprofen was used as a model contaminant, and a high percentage of removal, at least 90%, was obtained in a short time under our experimental conditions. Thus, a comprehensive investigation into the adsorption of ketoprofen onto chitosan film was performed, detailing the nature of the adsorption by studying the effects of pH, temperature changes, and electrolyte presence in the solutions containing the pollutant. The process was found to be pH-dependent, involving meanly electrostatic interactions between the pollutant molecules and chitosan. The endothermic character of the adsorption was inferred. The kinetics of the process was investigated, showing that the pseudo second-order kinetic model best fit the experimental data. A recycling process of the adsorbent was proposed; therefore, the adsorbed pollutant can be recovered by reusing the same adsorbent material for further consecutive cycles of adsorption without affecting the efficiency for ketoprofen removal from water.

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“…26 A similar scaffold, developed and optimized for tissue engineering applications, was also applied for the first time as adsorbent material for wastewater treatment, widening the biomedical application to environmental technology. 27 The hydrogel developed for this work, namely dPAA, is composed of amino-functionalized breakable 28 silica-shell nanocapsules, BNCs, covalently bound to the polyamidoamines-based hydrogel network. Such network contains cross-linkers bearing a disulfide bond, to impart breakability to the material upon exposure to cell-released glutathione.…”

Section: Introductionmentioning

confidence: 99%

Injectable Hybrid Hydrogels, with Cell-Responsive Degradation, for Tumor Resection

Alonci

Fiorini

Riva

et al. 2018

ACS Appl. Bio Mater.

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Biocompatible soft materials have recently found applications in interventional endoscopy to facilitate resection of mucosal tumors. When neoplastic lesions are in organs that can be easily damaged by perforation, such as stomach, intestine and esophagus, the formation of a submucosal fluid cushion (SFC) is needed to lift the tumor from the underlying muscle during the resection of neoplasias. Such procedure is called endoscopic submucosal dissection (ESD). We describe an injectable, biodegradable, hybrid hydrogel able to form a SFC and to facilitate ESD. The hydrogel, based on polyamidoamines, contains breakable silica nanocapsules covalently bound to its network, and able to release biomolecules. To promote degradation, the hydrogel is composed of cleavable disulfide moieties that are reduced by the cells through secretion of glutathione. The same 3 stimulus triggers the breaking of the silica nanocapsules; therefore, the entire hybrid material can be completely degraded and its decomposition depends entirely on the presence of cells. Interestingly the hydrogel precursor solution showed rapid gelation when injected in vivo and afforded a long-lasting high mucosal elevation, keeping the cushion volume constant during the dissection. This novel material can provide a solution to ESD limitations and promote healing of tissues after surgery

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Polyamidoamine‐Based Hydrogel for Removal of Blue and Red Dyes from Wastewater

Cited by 27 publications

References 55 publications

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

Chitosan Biopolymer from Crab Shell as Recyclable Film to Remove/Recover in Batch Ketoprofen from Water: Understanding the Factors Affecting the Adsorption Process

Injectable Hybrid Hydrogels, with Cell-Responsive Degradation, for Tumor Resection

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