Adsorption of natural dyes on clay fixed on polymers

Lopes, Toni Jefferson; Gonçalves, Odinei Hess; Barros, Ricardo Barbosa; Capelli, Francine Carla Rodrigues; Machado, Ricardo Antônio Francisco; Quadri, Mara Gabriela Novy; Quadri, Marintho Bastos

doi:10.1590/s1516-89132005000400034

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…Montmorillonite is a unique clay possessing cationexchange properties due to heterovalent (Al 3+ by Mg 2+ ) substitution in central octahedron metal-hydroxyl ions sheets, providing to layers a negative charge [1]. This property was explored to create polymer-clay composite sorbents to fix natural dyes (including anthocyanins) [2]. In the previous investigation in our laboratory [3] we proved the high potency of bentonite clays (containing namely montmorillonite) for anthocyanins sorption in acidic medium.…”

Section: Introductionmentioning

confidence: 88%

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Doronin¹,

Дейнека²,

Deineka³

et al. 2019

Proceedings of the 1st International Symposium Innovations in Life Sciences (ISILS 2019)

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Anthocyanins of red colored leaves of Cercis canadensis L. were found to be 3-glucosides of five common anthocyanidins-of delphinidin, cyaniding, petunidin, peonidin and malvidin with overall accumulation more than 350 mg per 100 g of FW in early summer. The content of anthocyanins gradually drops to total disappearance at the late September. Extract of anthocyanins may content a large amount of flavonoids that are not separated during solid phase extraction (SPE) on C18-silica syringe cartridges. In the paper, the ability of bentonite clay as a sorbent for SPE of anthocyanins was investigated. Non-charged flavonoids were shown to compete with anthocyanins during sorption. Meanwhile sorption ability of anthocyanins markedly exceeds that of non-charged flavonoids. The method for anthocyanins and non-charged flavonoids is proposed.

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Section: Introductionmentioning

confidence: 88%

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Doronin¹,

Дейнека²,

Deineka³

et al. 2019

Proceedings of the 1st International Symposium Innovations in Life Sciences (ISILS 2019)

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“…According to the described mechanism of toxicity, PhB is suitable for use in a composite matrix as an antimicrobial agent. If the matrix consisted only of the thermoplastic and PhB, then the antimicrobial activity of the PhB molecules inside the tightly arranged polymer matrix would be significantly reduced due to preventing contact of the PhB with the water or humidity (Lopes et al, 2005). Therefore, the presence of another component, a silicate matrix as shown herein, can increase antimicrobial effect.…”

Section: Introductionmentioning

confidence: 90%

Novel antimicrobial materials designed for the 3D printing of medical devices used during the COVID-19 crisis

Furka

Dadi

Palacka

et al. 2021

RPJ

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Purpose This study aims to describe the preparation of antimicrobial material usable in 3D printing of medical devices. Despite the wealth of technological progress at the time of the crisis caused by SARS-CoV-2 virus: Virus that causes current Pandemic situation (COVID-19), the global population had long been exposed beforehand to an acute absence of essential medical devices. As a response, a new type of composite materials intended for rapid prototyping, based on layered silicate saponite (Sap), antimicrobial dye phloxine B (PhB) and thermoplastics, has been recently developed. Design/methodology/approach Sap was modified with a cationic surfactant and subsequently functionalized with PhB. The hybrid material in powder form was then grounded with polyethylene terephthalate-glycol (PETG) or polylactic acid (PLA) in a precisely defined weight ratio and extruded into printing filaments. The stability and level of cytotoxicity of these materials in various physiological environments simulating the human body have been studied. The applicability of these materials in bacteria and a yeast-infected environment was evaluated. Findings Ideal content of the hybrid material, with respect to thermoplastic, was 15 weight %. Optimal printing temperature and speed, with respect to maintaining antimicrobial activity of the prepared materials, were T = 215°C at 50 mm/s for PETG/SapPhB and T = 230°C at 40 mm/s for PLA/SapPhB. 3 D-printed air filters made of these materials could keep inner air flow at 63.5% and 76.8% of the original value for the PLA/SapPhB and PETG/SapPhB, respectively, whereas the same components made without PhB had a 100% reduction of airflow. Practical implications The designed materials can be used for rapid prototyping of medical devices. Originality/value The new materials have been immediately used in the construction of an emergency lung ventilator, Q-vent, which has been used in different countries during the COVID-19 crisis.

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“…Clay is a fine particle (less than 2 μm size) which is mainly composed of silica, alumina and water. This cheap and ecofriendly material is abundantly found on the earth crust and possesses some attractive features such as high porosity, high ion-exchange ability, high specific surface area, good thermal stability and adsorption power [2,18,27,29,54,76,77,87]. Over the year's researchers have explored the application of clay as adsorbent, air purifier, catalyst etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of methylene blue dye from aqueous solution by a novel PVA/CMC/halloysite nanoclay bio composite: Characterization, kinetics, isotherm and antibacterial properties

Radoor

Karayil²,

Parameswaranpillai

et al. 2020

J Environ Health Sci Engineer

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Here the fabrication of a novel PVA/CMC/halloysite nanoclay membrane for the effective adsorption of cationic dye (methylene blue, MB) from aqueous environment is reported. The membranes were analyzed through scanning electron microscopy (SEM), optical microscopy (OM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), contact angle and universal testing machine (UTM) analysis. The adsorption behavior of the membrane in terms of nanoclay loading, contact time, initial concentration of MB, pH and temperature were also discussed. The membrane exhibits excellent removal efficiency (99.5%) for MB in the optimal conditions such as nanoclay dose = 6 wt%, initial dye concentration = 10 ppm, contact time = 240 min, pH = 10 and temperature = 30 °C. Three isotherm models (Freundlich, Langmuir and Temkin) were employed to analyze the dye adsorption data. The results revealed that the adsorption process could be described well with both Freundlich and Langmuir isotherm model. The kinetics of MB adsorption onto membrane follows pseudo-second-order model while thermodynamic parameter indicate that adsorption is feasible and endothermic in nature. The antibacterial studies revealed that the PVA/CMC/halloysite nanoclay membrane possess notable antibacterial property. Finally, the desorption studies showed that the membrane have good reusability even after four recycles.

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Adsorption of natural dyes on clay fixed on polymers

Cited by 9 publications

References 5 publications

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Novel antimicrobial materials designed for the 3D printing of medical devices used during the COVID-19 crisis

Adsorption of methylene blue dye from aqueous solution by a novel PVA/CMC/halloysite nanoclay bio composite: Characterization, kinetics, isotherm and antibacterial properties

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