Development of a new vacuum impregnation method at room atmosphere to produce silver–copper oxide nanoparticles on activated carbon for antibacterial applications

Arakawa, Flávia Sayuri; Shimabuku‐Biadola, Quelen Letícia; Silva, Marcela Fernandes; Bergamasco, Rosângela

doi:10.1080/09593330.2019.1567607

Cited by 9 publications

(6 citation statements)

References 61 publications

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“…These results may indicate that the deposition of metal compounds in mesopores may lead to the decrease in the mesopore volume, converting them into micropores. These results may suggest that the impregnation treatment lead to metal compounds, especially in mesopores (Arakawa et al, 2019a).…”

Section: Adsorbent Characterizationmentioning

confidence: 86%

Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies

2019

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Granular activated carbon was loaded with 0.5% manganese and 1.0% iron (m/m) for glyphosate removal from aqueous solutions. The adsorbent material was characterized by scanning electron microscopy, dispersive energy spectrometry, nitrogen adsorption techniques and zeta potential analyses. Batch studies were performed to investigate the adsorption equilibrium, kinetics mechanisms and to obtain thermodynamic information. Glyphosate adsorption increased with the contact time and achieved equilibrium within 24 h, with a maximum adsorption capacity of 9.19 mg g-1 at 45°C. Batch kinetic experimental data obeyed the pseudo-second-order model with R2>0.99. Adsorption isotherm experiments were carried out at 5, 15, 25, 35 and 45°C. The adsorption isotherms presented a better fitting using the Freundlich model (R2>0.98), indicating a multilayer adsorption of glyphosate. Thermodynamics studies showed that the adsorption of glyphosate onto granular activated carbon loaded with manganese and iron was spontaneous and feasible with negative values of ΔG°, endothermic with ΔH° of 20.924 kJ mol-1 and ΔS° of -73.250 J mol-1 K-1, suggesting a decrease in randomness at the solid–liquid interface between glyphosate and the adsorbent. The experimental results demonstrated that activated carbon loaded with manganese and iron may be an alternative for glyphosate removal in water, wastewater treatment and purification processes.

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Section: Adsorbent Characterizationmentioning

confidence: 86%

Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies

2019

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“…In biomedical applications, Ag-doped MgO emerged as a significant antimicrobial agent as compared to pure oxides of Mg against Staphylococcus aureus and P. aeruginosa ( Llorens et al, 2012 ; Nganga et al, 2013 ; Meena and Swapnil, 2019 ). Ag- and carbon-monolith-doped NPs were also found to be more active antimicrobial agents against C. albicans , Staphylococcus aureus , and E. coli ( Arakawa et al, 2019 ). Disk diffusion analyses have been performed against assured disease-causing pathogens like Staphylococcus aureus , E. coli , B. cereus , and P. aeruginosa to analyze their antimicrobial effects ( Zhu et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

et al. 2021

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Nanotechnology has become a very advanced and popular form of technology with huge potentials. Nanotechnology has been very well explored in the fields of electronics, automobiles, construction, medicine, and cosmetics, but the exploration of nanotecnology’s use in agriculture is still limited. Due to climate change, each year around 40% of crops face abiotic and biotic stress; with the global demand for food increasing, nanotechnology is seen as the best method to mitigate challenges in disease management in crops by reducing the use of chemical inputs such as herbicides, pesticides, and fungicides. The use of these toxic chemicals is potentially harmful to humans and the environment. Therefore, using NPs as fungicides/ bactericides or as nanofertilizers, due to their small size and high surface area with high reactivity, reduces the problems in plant disease management. There are several methods that have been used to synthesize NPs, such as physical and chemical methods. Specially, we need ecofriendly and nontoxic methods for the synthesis of NPs. Some biological organisms like plants, algae, yeast, bacteria, actinomycetes, and fungi have emerged as superlative candidates for the biological synthesis of NPs (also considered as green synthesis). Among these biological methods, endophytic microorganisms have been widely used to synthesize NPs with low metallic ions, which opens a new possibility on the edge of biological nanotechnology. In this review, we will have discussed the different methods of synthesis of NPs, such as top-down, bottom-up, and green synthesis (specially including endophytic microorganisms) methods, their mechanisms, different forms of NPs, such as magnesium oxide nanoparticles (MgO-NPs), copper nanoparticles (Cu-NPs), chitosan nanoparticles (CS-NPs), β-d-glucan nanoparticles (GNPs), and engineered nanoparticles (quantum dots, metalloids, nonmetals, carbon nanomaterials, dendrimers, and liposomes), and their molecular approaches in various aspects. At the molecular level, nanoparticles, such as mesoporous silica nanoparticles (MSN) and RNA-interference molecules, can also be used as molecular tools to carry genetic material during genetic engineering of plants. In plant disease management, NPs can be used as biosensors to diagnose the disease.

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“…Among them, activated carbon (AC) is the most extensively utilized adsorbent because of having various structural forms, chemical stability, low density, and large specific surface area [4]. This carbonaceous material with high porosity is widely utilized in water treatment processes to remove organic/inorganic pollutants [18][19][20] because of its tunable chemical and physical characteristics [21,22] including modifiable surface, high surface reactivity, large surface area, and highly porosity with controllability [23]. Currently, activated carbons are mostly considered as a catalyst and mild reducing agent with a low cost.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Copper Oxide Nanoparticles on Activated Carbon for pollutant removal in Tartrazine structure

Rad

2020

jcc

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In this study, activated carbon particles were modified by copper oxide to remove the anionic Tartrazine dye from aqueous solutions. Adsorption studies were performed as batch studies and the influences of pH, initial dye concentrations, and contact times were evaluated. Maximum removal percentage was obtained for the initial concentration of 30 mg/L and the equilibrium of the adsorption was achieved within 60 minutes of contact time. The Langmuir and Freundlich kinetic models were used for analyzing the equilibrium data. It was shown that better fitting was observed by the Langmuir model. Pseudo-first-order and Pseudo-second-order kinetic models were also applied to understand the kinetics of the adsorption processes. It was found that the Tartrazine adsorption followed the pseudo-second-order kinetic model.

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Development of a new vacuum impregnation method at room atmosphere to produce silver–copper oxide nanoparticles on activated carbon for antibacterial applications

Cited by 9 publications

References 61 publications

Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies

Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies

Endophytic Nanotechnology: An Approach to Study Scope and Potential Applications

Synthesis of Copper Oxide Nanoparticles on Activated Carbon for pollutant removal in Tartrazine structure

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