Incorporation of dumbbell-shaped and Y-shaped cross-linkers in adjustable pullulan/polydopamine hydrogels for selective adsorption of cationic dyes

Su, Ting; Wu, Lipeng; Zuo, Gancheng; Pan, Xin; Shi, Mingyang; Zhang, Cheng; Qi, Xiaoliang; Dong, Wei

doi:10.1016/j.envres.2019.109010

Cited by 48 publications

(14 citation statements)

References 49 publications

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“…based platforms for aqueous dye removal have been prolific over the last several years. To improve adsorption efficacy, the relationship between crosslinker structure and hydrogel affinity for cationic dyes was examined by Su et al [62] Introduction of polydopamine to pullulan to create hybrid hydrogels (PPGels) significantly enhanced affinity toward cationic dyes, equipping the gels with selective functionality for binding and removal of crystal violet and methylene blue in aqueous solution, but showed little to no affinity for azophloxine removal. Through increased addition of polydopamine content, decreased hydrogel zeta-potential was achieved, and thus the lyophilized PPGels had greater potential for removal of cationic dyes via electrostatic interactions which facilitated adsorption throughout the hydrogel structure.…”

Section: Organic Pollutant Removalmentioning

confidence: 99%

“…Through increased addition of polydopamine content, decreased hydrogel zeta‐potential was achieved, and thus the lyophilized PPGels had greater potential for removal of cationic dyes via electrostatic interactions which facilitated adsorption throughout the hydrogel structure. [ 62 ] 3D porous hydrogel sponges were synthesized using chitosan‐based polymers functionalized by 11‐mercaptoundecanoic acid and reportedly favored high adsorption capacity for methylene orange (MO) dye in water, with an apparent removal efficiency of greater than 90% for a wide range of MO solution concentrations. Contaminant removal mostly occurred through electrostatic interactions between anionic dye with thiol moieties present in the 3D chitosan sponges.…”

Section: Treating the Environment To Prevent Human Exposure To Enviro...mentioning

confidence: 99%

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Hydrogels and Hydrogel Nanocomposites: Enhancing Healthcare through Human and Environmental Treatment

Gutiérrez

Frazar

Klaus

et al. 2021

Adv Healthcare Materials

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Humans are constantly exposed to exogenous chemicals throughout their life, which can lead to a multitude of negative health impacts. Advanced materials can play a key role in preventing or mitigating these impacts through a wide variety of applications. The tunable properties of hydrogels and hydrogel nanocomposites (e.g., swelling behavior, biocompatibility, stimuli responsiveness, functionality, etc.) have deemed them ideal platforms for removal of environmental contaminants, detoxification, and reduction of body burden from exogenous chemical exposures for prevention of disease initiation, and advanced treatment of chronic diseases, including cancer, diabetes, and cardiovascular disease. In this review, three main junctures where the use of hydrogel and hydrogel nanocomposite materials can intervene to positively impact human health are highlighted: 1) preventing exposures to environmental contaminants, 2) prophylactic treatments to prevent chronic disease initiation, and 3) treating chronic diseases after they have developed.

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Section: Organic Pollutant Removalmentioning

confidence: 99%

Section: Treating the Environment To Prevent Human Exposure To Enviro...mentioning

confidence: 99%

Hydrogels and Hydrogel Nanocomposites: Enhancing Healthcare through Human and Environmental Treatment

Gutiérrez

Frazar

Klaus

et al. 2021

Adv Healthcare Materials

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“…In a recent study, a pullulan-cl-diglycerols montmorillonite hydrogel nanocomposite has been explored for adsorptive scavenging of crystal violet ( Q max = 80 mg g –1 ) . However, pullulan/dopamine hydrogels and a polydopamine-modified pullulan-montmorillonite hydrogel nanocomposite revealed an enhanced uptake of the same dye with adsorption capacities of 96 and 112.45 mg g –1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Mitigation of Paracetamol with a Novel Dual-Functionalized Pullulan/Kaolin Hydrogel Nanocomposite from Simulated Wastewater

et al. 2022

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In the present investigation, a novel, green, and economical dual-functionalized pullulan/kaolin hydrogel nanocomposite (f-PKHN) was fabricated and subsequently applied for the liquid-phase decontamination of paracetamol (PCT), a pharmaceutical pollutant. Pullulan and kaolin were functionalized with L-asparagine and gallic acid, respectively. The physicochemical facets of the functionalized pullulan/kaolin hydrogel nanocomposite and its interactive behavior with PCT were elucidated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), and elemental mapping. The process parameters along with the isotherm, kinetics, and thermodynamics were methodically appraised via a batch technique to unveil the adsorption performance of the as-fabricated hydrogel nanocomposite. The adsorption isotherm and kinetics of PCT uptake by f-PKHN conform well to Freundlich and pseudosecond-order models, respectively. Relying on hydrogen bonding, n−π, and van der Waals interactions, the maximum adsorption capacity was 332.54 mg g −1 , higher than for most of the previous adsorbents reported in the literature for PCT removal. Thermodynamic calculations corroborated endothermic, spontaneous, and feasible adsorption phenomena. The maintenance of a high uptake percentage (69.11%) in the fifth consecutive adsorption−desorption cycle implied the significant reusable potential of f-PKHN. Swelling studies exhibited 90% swelling within 200 min, indicating the successful fabrication of a cross-linked hydrogel network. The real water (distilled water, tap water, and river water) samples spiked with PCT specified a significant uptake of PCT (>85%), and the minor influence of ionic strength on the adsorptive potential of f-PKHN validated its potentiality for the decontamination of real effluents. In conclusion, f-PKHN with substantial adsorption capacity, green characteristics, and excellent reusability can be reckoned with as a promising adsorbent for the de-escalation of PCT from aquatic sources as well as at the industrial level.

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“…They are used to treat dye-polluted effluents due to their enhanced adsorption capacity, reusability, and smooth operation ( Deng et al, 2013 ). Researchers have studied various adsorbents designed from natural polymers, for example, cellulose/chitosan hydrogel beads ( Li et al, 2016 ), cellulose nanocrystals/alginate hydrogel beads ( Mohammed et al, 2015 ), pullulan/polydopamine hydrogels ( Su et al, 2020 ), etc. However, majority of these adsorbents are active only at a lower pH range, adsorbs single dye, and exhibit low dye retention capacities.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of pH-Responsive, Self-Assembled, Novel Polysaccharide Composite Hydrogel and Its Application in Selective Capture of Cationic/Anionic Dyes

Srivastava

Choudhury

2021

Front. Chem.

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Dyes are one of the most hazardous chemicals causing significant environmental pollution and affecting water quality. Majority of the existing methods for dye removal and degradation involve synthetic membranes and use of hazardous chemicals, further resulting in secondary pollution. The present study reports polysaccharide based novel composite hydrogel as biodegradable matrix for pH-responsive selective adsorption of cationic/anionic dyes. This membrane showed pH-responsive adsorption of methyl green (MG) and methyl orange (MO) with similar adsorption equilibrium, i.e., 315 and 276 mg g−1, respectively. Interestingly, selective adsorption at different pH has allowed separation of dye mixtures that holds incredible industrial importance for dyes recovery. The hydrogel matrix was able to completely separate MG, a model cationic dye at neutral pH from the dye mixture whereas, it was possible to remove 60% MO, a model anionic dye at acidic pH. Furthermore, comprehensive isothermal and kinetic studies of adsorption revealed that Freundlich isotherm describing the multilayer coverage and pseudo-second-order kinetics were followed. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic. In fact, the membrane was reusable for at least ten cycles and exhibited desorption efficiency of 80 and 60% for MO and MG, respectively, which may be further recycled to make the process environmentally sustainable. Overall, this study proposes an inexpensive, simple, biologically safe, and efficient adsorbent material for dye effluent treatment.

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Incorporation of dumbbell-shaped and Y-shaped cross-linkers in adjustable pullulan/polydopamine hydrogels for selective adsorption of cationic dyes

Cited by 48 publications

References 49 publications

Hydrogels and Hydrogel Nanocomposites: Enhancing Healthcare through Human and Environmental Treatment

Hydrogels and Hydrogel Nanocomposites: Enhancing Healthcare through Human and Environmental Treatment

Sustainable Mitigation of Paracetamol with a Novel Dual-Functionalized Pullulan/Kaolin Hydrogel Nanocomposite from Simulated Wastewater

Green Synthesis of pH-Responsive, Self-Assembled, Novel Polysaccharide Composite Hydrogel and Its Application in Selective Capture of Cationic/Anionic Dyes

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