Liquid phase scavenging of Cd (II) and Cu (II) ions onto novel nanoscale zerovalent manganese (nZVMn): Equilibrium, kinetic and thermodynamic studies

Dada, Adewumi O.; Adekola, Folahan A.; Odebunmi, Ezekiel O.

doi:10.1016/j.enmm.2017.05.001

Cited by 43 publications

(26 citation statements)

References 37 publications

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“…Building up of nanoparticles could be through top-down or bottom-up approach routes [2] . Based on physical and chemical properties, nanoparticles are classified into carbon-based [3] ), metallic [4] , ceramic, polymeric [5] , semiconductor [6] and liquid-based [7] . Feasibility of size, facet and shape variation during synthesis gave metallic nanoparticles edge of various applications.…”

Section: Methods Detailsmentioning

confidence: 99%

“…Langmuir and Freundlich isotherm are the two most common models employed to describe the equilibrium data. In order to carry out kinetic studies, the adsorption kinetic experiments were conducted at optimum conditions for Cu 2+ ions at contact time ranging from 10 – 120 min [4] , [7] . The kinetic data were fitted into pseudo first-order and pseudo second-order models.…”

Section: Batch Adsorption Processmentioning

confidence: 99%

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Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

et al. 2020

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Section: Methods Detailsmentioning

confidence: 99%

Section: Batch Adsorption Processmentioning

confidence: 99%

Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

et al. 2020

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“…SEM identifies the surface characteristics, morphology and the distribution of the TD-AgNPs depicted on the SEM micrograph ( Fig. 3C ; Dada, Adekola & Odebunmi, 2017a ).…”

Section: Characterizationmentioning

confidence: 99%

Effect of operational parameters, characterization and antibacterial studies of green synthesis of silver nanoparticles using Tithonia diversifolia

Dada

Inyinbor

Idu

et al. 2018

PeerJ

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BackgroundThere is a growing interest in the green synthesis of silver nanoparticles (AgNPs) using plant extract because the technique is cost effective, eco-friendly and environmentally benign. This is phasing out the use of toxic and hazardous chemical earlier reported. Tithonia diversifolia is a wild sunflower that grows widely in the western part of Nigeria with a proven medicinal benefit. However, several studies carried out have left doubts on the basic operational parameters needed for the green synthesis of AgNPs. The objective of this work was to carry out green synthesis of AgNPs using T. diversifolia extract via an eco-friendly route through optimization of various operational parameters, characterization, and antimicrobial studies.MethodGreen synthesis of TD-AgNPs was done via bottom-up approach through wet chemistry technique using environmentally benign T. diversifolia plant extract as both reducing and stabilizing agent. Phytochemical Screening of the TD plant extract was carried out. Experimental optimization of various operational parameters—reaction time, concentration, volume ratio, and temperature was investigated. TD-AgNPs were characterized by UV–Vis spectroscopy, FTIR Spectroscopy, SEM/energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and transmission electron microscopy (TEM). Antimicrobial studies against multi drug resistant microorganisms (MDRM) were studied using the agar well diffusion method.ResultsThis study reveals the importance of various operational parameters in the synthesis of TD-AgNPs. Excellent surface plasmon resonance peaks (SPR) were obtained at optimum experimental factors of 90 min reaction time under room temperature at 0.001M concentration with the volume ratio of 1:9 (TD extract:Ag ion solution). The synthesis was monitored using UV–Vis and maximum wavelength obtained at 430 nm was due to SPR. The morphology and elemental constituents obtained by TEM, SEM, and EDX results revealed a spherical shape of AgNPs with prominent peak of Ag at 3.0 kV in EDX spectrum. The crystallinity nature was confirmed by XRD studies. FTIR analysis proved presence of biomolecules functioning as reducing, stabilizing, and capping agents. These biomolecules were confirmed to be flavonoid, triterpenes, and saponin from phytochemical screening. The antimicrobial studies of TD-AgNPs were tested against MDRM—Escherichia coli, Salmonella typhi, Salmonella enterica, and Bacillus subtilis.DiscussionThe variation of reaction time, temperature, concentration, and volume ratio played substantive and fundamental roles in the synthesis of TD-AgNPs. A good dispersion of small spherical size between 10 and 26 nm was confirmed by TEM and SEM. A dual action mechanism of anti-microbial effects was provided by TD-AgNPs which are bactericidal and membrane-disruption. Based on the antimicrobial activity, the synthesized TD-AgNPs could find good application in medicine, pharmaceutical, biotechnology, and food science.

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“…Energy-dispersive X-ray spectroscopy (EDX) is an analytical technique that gives information on the surface atomic distribution and the chemical elemental composition [62][63][64][65]. In most cases, the EDX is always coupled with SEM.…”

Section: Energy-dispersive X-ray Spectroscopy (Edx)mentioning

confidence: 99%

Exploring the Effect of Operational Factors and Characterization Imperative to the Synthesis of Silver Nanoparticles

Dada¹,

Adekola²,

Adeyemi³

et al. 2018

Silver Nanoparticles - Fabrication, Characterization and Applications

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The synthesis and application of silver nanoparticles are increasingly becoming attractive. Hence, a critical examination of the various factors needed for the synthesis of silver nanoparticles as well as the characterization is imperative. In light of this, we addressed in this chapter, the nitty-gritty on the operational parameters (factors) and characterization relevant to synthesis of silver nanoparticle. The following characterization protocols were discussed in the context of silver nanoparticle synthesis. These protocols include spectroscopic techniques such as ultraviolet visible spectroscopy (UV-Vis), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray fluorescence (XRF), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS).

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Liquid phase scavenging of Cd (II) and Cu (II) ions onto novel nanoscale zerovalent manganese (nZVMn): Equilibrium, kinetic and thermodynamic studies

Cited by 43 publications

References 37 publications

Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

Bottom-up approach synthesis of core-shell nanoscale zerovalent iron (CS-nZVI): Physicochemical and spectroscopic characterization with Cu(II) ions adsorption application

Effect of operational parameters, characterization and antibacterial studies of green synthesis of silver nanoparticles using Tithonia diversifolia

Exploring the Effect of Operational Factors and Characterization Imperative to the Synthesis of Silver Nanoparticles

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