Leaf-extract mediated zero-valent iron for oxidation of Arsenic (III): Preparation, characterization and kinetics

Rana, Anu; Kumari, Nisha; Tyagi, Mohit; Jagadevan, Sheeja

doi:10.1016/j.cej.2018.04.075

Cited by 67 publications

(27 citation statements)

References 55 publications

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“…As it can be seen from the XRD pattern, the zero valent iron is synthesized as well as iron oxides NPs. The characteristic peak of zero-valent iron at 2u = 44.9°, indicating that the green method produces amorphous nZVI (Machado et al, 2015;Rana et al, 2018), was also reported by other researchers (Wang et al, 2014).…”

Section: Characterization Of the Green-synthesized Zero-valent Iron Nanoparticlessupporting

confidence: 79%

Removal of reactive black 5 dye using zero valent iron nanoparticles produced by a novel green synthesis method

Khashij

Dalvand

Mehralian

et al. 2020

PRT

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Purpose The purpose of this paper is to analyze zero valent iron nanoparticles (NZVIs) by a novel green method, taken from Thymus vulgaris (TV) plant extract, were synthesized and applied to degrade reactive black 5 (RB5) azo dye. Design/methodology/approach The optimum conditions for the highest removal of RB5 dye were determined. Characterization of NZVIs was done by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The NZVIs were used for the removal of dye RB5, and the parameters affecting were discussed like pH, initial concentration, contact time and NZVIs dosage. Findings The characterization results of NZVIs by SEM, TEM, FTIR and XRD show that polyphenols, organic acids and proteins reduce not only the green synthesis of NZVIs but also the aggregation of nanoparticles. The maximum dye removal efficiency of 99.6 per cent occurred at pH 4, NZVIs dose of 600 mg/L, and contact time of 5 min. The adsorption of RB5 dye onto the NZVIs surface and scavenging of the azo bond (−N = N) by the strong reduction of NZVIs were the proposed mechanisms for dye removal. The application of NZVIs to treat wastewater containing reactive dye shows high degradation efficiency. Research limitations/implications The findings may greatly benefit the application of the NZVIs taken from Thymus vulgaris (TV) in the fields of dye adsorption. Practical implications The present study is novel because it incorporated the morphological and structural properties of the synthesized NZVIs using a native plant of Iran and studied the capability of green-synthesized NZVIs to remove RB5 as a water contaminant. Social implications The native plant presented here can be developed for reduced environmental pollution before discharge to accepted water. Originality/value The NZVIs is prepared via green-synthesized method, which is prepared with leaves of TV. There are two main innovations. One is that the novel NZVIs is prepared successfully by native plant via green-synthesized method. The other is that the optimized conditions were obtained for the removal of RB5 dye as a water contaminant. Furthermore, to the best of our knowledge, no study has ever investigated the removal of RB5 by NZVIs produced using a native plant in Iran.

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Section: Characterization Of the Green-synthesized Zero-valent Iron Nanoparticlessupporting

confidence: 79%

Removal of reactive black 5 dye using zero valent iron nanoparticles produced by a novel green synthesis method

Khashij

Dalvand

Mehralian

et al. 2020

PRT

View full text Add to dashboard Cite

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“…reported that upon mixing with As V contaminated water, clay‐supported nZVI particles can achieve 99 % removal of arsenic (As III ) in 30 min at pH values ranging from 2.75 to 11.1 . Other researchers have reported a similar approach for arsenic removal by using eucalyptus, mango, jamun, and guava leaf extracts and blueberry plant extracts . Budi et al .…”

Section: Applications Of Sustainably Synthesized Nzvimentioning

confidence: 99%

Sustainable Synthesis of Nanoscale Zerovalent Iron Particles for Environmental Remediation

et al. 2020

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Nanoscale zerovalent iron (nZVI) particles represent an important material for diverse environmental applications because of their exceptional electron‐donating properties, which can be exploited for applications such as reduction, catalysis, adsorption, and degradation of a broad range of pollutants. The synthesis and assembly of nZVI by using biological and natural sustainable resources is an attractive option for alleviating environmental contamination worldwide. In this Review, various green synthesis pathways for generating nZVI particles are summarized and compared with conventional chemical and physical methods. In addition to describing the latest environmentally benign methods for the synthesis of nZVI, their properties and interactions with diverse biomolecules are discussed, especially in the context of environmental remediation and catalysis. Future prospects in the field are also considered.

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“…Liu et al [144] proposed that the phenolic compounds, as well as the functional groups of other biomolecules present in plant extracts, are capable of forming iron nanoparticles in three stages: (1) the compounds form complexes with Fe 3+ and simultaneously reduce it to Fe 2+ (quation (1)); (2) the compounds present in the extracts continue to reduce iron, now from Fe 2+ to Fe 0 (equation ( 2)); and (3) the phenolic compounds and other ligands terminate the reaction, surrounding the nanoparticles and helping to their stability. Wang et al [142] and Rama et al [145] obtained iron nanoparticles from extracts of Eucalyptus, and suggest that the formation of nanoparticles from Fe 2+ ions is produced by the reduction of Fe 2+ to Fe 0 by means of the phenolic compounds present in the extracts (item 2). It has been proposed that phenolic compounds are also capable of forming metal oxide nanoparticles with a core of Fe 0 and Fe x O y , and a layer of biomolecules (equation ( 3)) [100,144].…”

Section: Mechanisms Of Nanoparticle Formationmentioning

confidence: 99%

Eucalyptusextracts-mediated synthesis of metallic and metal oxide nanoparticles: current status and perspectives

Salgado

Mártire

Vidal

2019

Mater. Res. Express

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In recent decades, nanotechnology has received great attention due to its broad fields of application. The conventional processes applied to the synthesis processes of nanomaterials can be classified in chemical and physical methods. These technologies involve several environmental and cost problems. In order to avoid the problems caused by conventional methods, the use of biological systems such as bacteria, fungi, yeasts, and algae in the synthesis of nanomaterials has recently received extensive attention. To the same purpose, the routes of synthesis of metallic and metal oxides nanoparticles using plant extracts show promising perspectives. The methods involving plant extracts, unlike other biological methods, stand out for their ease and low implementation costs. In addition, the use of plant extracts avoids the risks associated with the use of highly toxic compounds, which are harmful to human health and the environment. This review summarizes the relevance of using plant extracts in the synthesis of metal and metal oxides nanoparticles compared to other synthesis methods and emphasizes the use of extracts of different species of Eucalyptus. The main topics covered by this review include (i) the effect of the synthesis parameters on the features of the nanomaterials; (ii) the effect of the composition of the extracts on the synthesis; (iii) the main mechanisms proposed to explain the formation of the nanoparticles; and (iv) future challenges related to the green synthesis of nanoparticles.

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Leaf-extract mediated zero-valent iron for oxidation of Arsenic (III): Preparation, characterization and kinetics

Cited by 67 publications

References 55 publications

Removal of reactive black 5 dye using zero valent iron nanoparticles produced by a novel green synthesis method

Removal of reactive black 5 dye using zero valent iron nanoparticles produced by a novel green synthesis method

Sustainable Synthesis of Nanoscale Zerovalent Iron Particles for Environmental Remediation

Eucalyptusextracts-mediated synthesis of metallic and metal oxide nanoparticles: current status and perspectives

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