Adsorption and Removal of Methylene Blue from Aqueous Solution Using Sterile Bract of Araucaria angustifolia as Novel Natural Adsorbent

Matias, Caroline Aparecida; Vilela, Pâmela Becalli; Becegato, Valter Antônio; Paulino, Alexandre Tadeu

doi:10.1007/s41742-019-00231-7

Cited by 10 publications

(6 citation statements)

References 58 publications

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“…The nZVI sample was synthesized according to the previously reported method (Federation, 2005;Matias, Vilela, Becegato, & Paulino, 2019;Urooj et al, 2019;€ Uz€ um et al, 2009). The 9.68 g of FeCl 3 .6H 2 O was dissolved in 100 mL of bi-distilled water and pure ethanol (4:1, v/v).…”

Section: Synthesis Of Nzvi and Bentonite-supported Nzvimentioning

confidence: 99%

“…Afterward, particles were collected using vacuum filtration, and then the particles were washed and rinsed using absolute ethanol at least 3 times. To avoid oxidation the produced particles were dehydrated overnight under a vacuum at 333 K, and then the samples produced were kept in an inert atmosphere for further study (Kim et al, 2008;Matias et al, 2019).…”

Section: Synthesis Of Nzvi and Bentonite-supported Nzvimentioning

confidence: 99%

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Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Sulaiman

Al-Jabari

2021

Arab Journal of Basic and Applied Sciences

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Nano zero-valent iron-bentonite (B-nZVI) is an excellent composite for treating recalcitrant organic pollutants. In this study, B-nZVI was prepared via NaBH 4 reduction method and characterized using different instruments including X-ray diffractometer (XRD), Fourier-transform infrared spectrometry (FTIR), Field emission scanning electron microscope (SEM), Transmission electron microscope (TEM), and UV-Vis spectroscopy. Also, the efficiency of B-nZVI as an adsorbent to remove diclofenac sodium (DCF) from aqueous solution was investigated, and compared with activated carbon (AC) under different experimental conditions such as pH, adsorbent dose, DCF initial concentration, temperature, and contact time. The B-nZVI has successfully removed a high percentage of DCF from aqueous solution ($80%) within 50 min, 25 C, and pH ¼ 3. The maximum adsorption capacity of B-nZVI at equilibrium was 140.8 mg g À1 compared to 107.5 mg g À1 via AC. Furthermore, it was found that the DCF adsorption best fitted the Langmuir isotherm and pseudo-second-order kinetic models (R 2 > 0.987). Also, the thermodynamic parameters of adsorption were estimated and the average values showed that the adsorption of DCF via B-nZVI is an endothermic processðDH ¼ 29:865:2kJ mol À1 Þ, and spontaneous with a positive value of entropy ðDS ¼ 175:4 6 11:3J mol À1 K À1 Þ at 25 C. The point of zero charge (PZC) was determined (7.0 ± 0.1) using a salt addition method. Finally, column filtration was demonstrated using a mixture of sand and B-nZVI composite, which showed a significant advantage in comparison with that activated carbon/sand mixture.

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Section: Synthesis Of Nzvi and Bentonite-supported Nzvimentioning

confidence: 99%

Section: Synthesis Of Nzvi and Bentonite-supported Nzvimentioning

confidence: 99%

Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Sulaiman

Al-Jabari

2021

Arab Journal of Basic and Applied Sciences

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“…The fruits of this conifer are known as pines, and the pine seed is referred to as pinhão . Each seed consists of a wrap, pulp, and embryo, fractions rich in cellulose, starch, and lipids (Beninca et al., 2020; Freitas et al., 2018; Matias et al., 2019). Despite the importance and high functionality of pinhão , few studies focus on the properties of the different parts of this plant (Branco & Rodrigues, 2016; Souza et al., 2014), being its coat particularly underexplored (Fonseca et al., 2020a; Santos et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

“…The coat of pinhão represents about 20% of its total weight. It is considered an agro‐industrial residue, being usually disposed (Freitas et al., 2018; Matias et al., 2019). According to Fonseca et al.…”

Section: Introductionmentioning

confidence: 99%

Pinhão coat extract encapsulated in starch ultrafine fibers: Thermal, antioxidant, and antimicrobial properties and in vitro biological digestion

Cruz

Fonseca

Radünz

et al. 2021

Journal of Food Science

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This study aimed to produce soluble potato starch ultrafine fibers for the encapsulation of pinhão coat extract (PCE), evaluating their relative crystallinity (RC), thermal stability, antioxidant activity, antimicrobial activity against Escherichia coli and Staphylococcus aureus, as well as in vitro biological digestion. In the simulation of in vitro biological digestion, the phenolic compounds release profile was also evaluated. The ultrafine fibers were produced by electrospinning, based on a polymeric solution composed of soluble potato starch (50% w/v) and formic acid. Then, PCE was incorporated at various concentrations (0.5%, 1.0%, and 1.5%, w/w, dry basis). The endothermic event of free PCE was not observed in the ultrafine fibers, which suggests its encapsulation. The RC decreased according to the increase in PCE concentration in the ultrafine fibers. The PCE resisted thermal treatments when encapsulated into the ultrafine fibers (100 and 180°C), and the ultrafine fibers with 1% PCE presented the highest amount of preserved phenolic compounds. Regarding antioxidant activity, the free PCE presented 85% of DPPH inhibition and the ultrafine fibers had 18% inhibition, not differing among the PCE concentrations (p < 0.05). The free PCE and the ultrafine fibers with 0.5% PCE showed inhibitory effect against S. aureus and the ones with 1.5% PCE showed controlled release of phenolic compounds during the simulation of in vitro digestion. Starch ultrafine fibers showed potential to be applied in food industries due to their capacity of protecting phenolic compounds when submitted to high temperatures or gastrointestinal conditions. Nevertheless, their application depends on the end use of the product. Practical Application The encapsulation of pinhão coat extract (PCE) in ultrafine starch fibers promotes greater preservation of phenolic compounds. Thus, it can be incorporated into different foods that are produced using the ultra‐high temperature (UHT) process—at 135–145°C for 5 to 10 s, or some other equivalent time/temperature combination. Another possibility is the incorporation of ultrafine fibers in active packaging: compounds can migrate to food, improving sensory characteristics, increasing shelf life, preventing chemical and microbiological deterioration, and ensuring food safety.

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“…The wastewater treatment, in addition to restoring water to the consumption cycle, also, can prevent environmental pollution. The adsorption processes by particulate solid adsorbents show potential as one of the most powerful ways for the elimination of pollutants in wastewater due to subjecting large adsorption surface area [1][2][3][4]. In the recent century, the development of the adsorption technology is owed to nanotechnology and fabrication of the new nanocomposites [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Core-shell Type Alginate/CNT Composite Adsorbent Beads by Combined Method of Magnetic-field/electrospray: Effect of CNT Orientation on Adsorption of Methylene Blue and Environmental Applications

Beigmoradi

Moayedfar

Khosravi

et al. 2021

Preprint

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In the present work, carbon nanotubes (CNT)/alginate composite adsorbent was prepared using combined method of magnetic field/electrospray. The effects of magnetic and electric fields on CNT orientation in the polymeric matrix of adsorbent, and consequently on the methylene blue adsorption were investigated. The adsorbents characteristics and adsorption performance of the six types samples were obtained using field-emission scanning electron microscopy (FE-SEM) and Ultraviolet-visible (UV-Vis) spectroscopy, respectively. The FE-SEM image observations indicated that under the setup’s operating condition, the magnetic field could partially orient the CNTs in the polymer matrix while the electrical field had a little effect. The obtained results clearly represented the positive effects of CNT orientation on enhancing the adsorption of methylene blue into the CNT/alginate composite adsorbents. The egg-box model in the CNT/alginate core-shell type beads could explain the adsorption performance of methylene blue solution onto the six types fabricated beads.

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Adsorption and Removal of Methylene Blue from Aqueous Solution Using Sterile Bract of Araucaria angustifolia as Novel Natural Adsorbent

Cited by 10 publications

References 58 publications

Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Pinhão coat extract encapsulated in starch ultrafine fibers: Thermal, antioxidant, and antimicrobial properties and in vitro biological digestion

Fabrication of Core-shell Type Alginate/CNT Composite Adsorbent Beads by Combined Method of Magnetic-field/electrospray: Effect of CNT Orientation on Adsorption of Methylene Blue and Environmental Applications

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