Silk fibroin fiber for selective palladium adsorption: Kinetic, isothermal and thermodynamic properties

Sato, T.; Abe, Saki; Ito, Shinko; Abe, Tatsuo

doi:10.1016/j.jece.2019.102958

Cited by 30 publications

(5 citation statements)

References 20 publications

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“…The SF-BGE, SF-BGE/TA solution, and SF-BGE/TA/ZnO hydrogel exhibited three absorption peaks: amide I at 1646 cm −1 , amide II at 1513 cm −1 , and amide III at 1233 cm −1 . The absorption of the SF-BGE at 3200 cm −1 corresponds to N-H stretching [ 25 , 26 ]. The broad peak of TA at 3285 cm −1 is attributed to the stretching vibration of -OH.…”

Section: Resultsmentioning

confidence: 99%

Silk Fibroin/Tannin/ZnO Nanocomposite Hydrogel with Hemostatic Activities

Yang

Lee

et al. 2022

Gels

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The inevitable bleeding and infections caused by disasters and accidents are the main causes of death owing to extrinsic trauma. Hemostatic agents are often used to quickly suppress bleeding and infection, and they can solve this problem in a short time. Silk fibroin (SF) has poor processibility in water, owing to incomplete solubility therein. In this study, aiming to overcome this disadvantage, a modified silk fibroin (SF-BGE), easily soluble in water, was prepared by introducing butyl glycidyl ether (BGE) into its side chain. Subsequently, a small amount of tannic acid (TA) was introduced to prepare an SF-BGE /TA solution, and ZnO nanoparticles (NPs) were added to the solution to form the coordination bonds between the ZnO and TA, leading to an SF-based nanocomposite hydrogel. A structural characterization of the SF-BGE, SF-BGE/TA, SF-BGE/TA/ZnO, and the coordination bonds between ZnO/TA was observed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), and the phase change was observed by rheological measurements. The pore formation of the SF-BGE/TA/ZnO hydrogel and dispersibility of ZnO were verified through energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM). The cytocompatible and hemostatic performances of the SF-BGE/TA/ZnO NPs composite hydrogels were evaluated, and the hydrogels showed superior hemostatic and cytocompatible activities. Therefore, the SF-based nanocomposite hydrogel is considered as a promising material for hemostasis.

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Section: Resultsmentioning

confidence: 99%

Silk Fibroin/Tannin/ZnO Nanocomposite Hydrogel with Hemostatic Activities

Yang

Lee

et al. 2022

Gels

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“…The pseudo-first-order model considers that the adsorption occurs in a monolayer, without interaction between the adsorbed molecules and at specific sites, governed by a first-order equation. The pseudo-second-order kinetic model follows the same precepts as the pseudo-first-order but is governed by a second-order equation (Sato et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Nippes

Macruz

Molina

et al. 2022

Water Air Soil Pollut

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The presence of drugs on a large scale in aquatic matrices raises concern and requires the study of efficient technologies to remove these compounds. This study investigated the adsorption capacity of the natural zeolite clinoptilolite (CP) in removing the drug hydroxychloroquine (HCQ). Zeolite was characterized by BET, XRD, FT-IR, SEM, and pH pzc techniques. The kinetic model that best fits the experimental data was the pseudo-first-order and the SIPS isotherm provided the best fit. The Langmuir isotherm RL separation factor (> 0.01) indicated that the adsorption process was favorable and the Freundlich isotherm ( n > 1) suggested that the adsorption mechanism occurred mainly by physisorption, with intraparticle diffusion as the step limiting the process. The process was spontaneous (ΔG° ads < 0), endothermic (ΔH° ads > 0), and with increased randomness at the solid-solution interface (ΔS° ads > 0). The initial pH variation of the effluent was not favorable for the adsorption process and the zeolite was easily regenerated for later use. The ecotoxicological tests with Artemia salina and Lactuca Sativa proved that the final effluent did not show toxicity after the adsorption treatment. Based on the results obtained in this work, clinoptilolite zeolite is a potential adsorbent for reducing HCQ toxicity in aquatic matrices. Supplementary Information The online version contains supplementary material available at 10.1007/s11270-022-05787-3.

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“…This value is indicative of rapid kinetics of RH@MCM-41@ARS towards Pd 2+ compared to other sorbents. Maximum adsorption efficiency of Pd 2+ was attained after 45 min on a biomass of fungi and yeast [ 32 ], 180 min on silk fibroin fiber [ 33 ], 30 min onto a montmorillonite derivative [ 34 ], 240 min on bayberry tannin immobilized collagen fiber [ 35 ] and 120 min on glycine modified crosslinked chitosan resin [ 36 ]. According to the obtained results, 20 min has been set as the optimum stirring time for the next experiments.…”

Section: Resultsmentioning

confidence: 99%

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

Nabieh

Mortada

Helmy

et al. 2021

Heliyon

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Bio-matrix of rice husk and Mobil Composition of Matter No. 41 (MCM-41) was modified with alizarin red S for preconcentration of Pd 2+ prior flame atomic absorption spectrometric determination. The prepared bio-matrix (RH@MCM-41@ARS) was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope, energy dispersive X-ray spectrometer (SEM/EDX) and surface area studies. The impact of different parameters (solution pH, amount of sorbent, contact time, sample volume, initial Pd 2+ concentration and diverse ions) on the uptake of Pd 2+ were evaluated. The maximum adsorption capacity of Pd 2+ onto RH@MCM-41@ARS was 198.2 mg g −1 at optimum conditions. Applying the optimized procedure as a preconcentration step led to limit of detection of 0.13 μg L −1 and dynamic analytical range up to 500 μg L −1 . The sorbent was regenerated by 0.5 mol L −1 thiourea for at least 10 cycles without significant reduction of adsorption capacity. The method was applied for preconcentration of Pd 2+ from real samples.

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Silk fibroin fiber for selective palladium adsorption: Kinetic, isothermal and thermodynamic properties

Cited by 30 publications

References 20 publications

Silk Fibroin/Tannin/ZnO Nanocomposite Hydrogel with Hemostatic Activities

Silk Fibroin/Tannin/ZnO Nanocomposite Hydrogel with Hemostatic Activities

Hydroxychloroquine Adsorption in Aqueous Medium Using Clinoptilolite Zeolite

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

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