Biosynthesized iron nanoparticles in aqueous extracts of Eichhornia crassipes and its mechanism in the hexavalent chromium removal

Wei, Yufen; Fang, Zhen; Zheng, Liuchun; Tsang, Eric Pokeung

doi:10.1016/j.apsusc.2016.12.090

Cited by 120 publications

(41 citation statements)

References 32 publications

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“…The presence of sulphur can be attributed to the organosulphur compounds and potassium and sodium elements that might be present in the extract acting as capping agents during the synthesis of iron oxide nanoparticles. Similar results for the presence of elemental composition from the extract have already been reported [47]. The phytochemical constituents in the seed coat extract have been screened for the presence of tannins, flavanoids, saponins, terpenoids, glycosides [28], whereas further investigation needs to be done in order to determine the elemental composition of the seed coat extract.…”

Section: Morphological and Elemental Analysissupporting

confidence: 75%

Biogenic synthesis of magnetic iron oxide nanoparticles using inedible borassus flabellifer seed coat: characterization, antimicrobial, antioxidant activity and in vitro cytotoxicity analysis

Sandhya

Kalaiselvam

2020

Mater. Res. Express

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An environment friendly green synthesis of iron oxide nanoparticles using the seed coat extract of B.flabellifer was investigated. The nanoparticles were characterized using XRD, UV–vis spectroscopy, FTIR, TGA, SEM and EDS. The x-ray diffraction spectrum showed the formation of crystalline inverse spinel magnetite nanoparticles with crystallite size of 35 nm and the UV–vis absorption recorded characteristic peak at 352 nm for iron oxide nanoparticles. The surface functionalization of the nanoparticles was confirmed from the various functional group peaks present in the FTIR spectrum and the thermal decomposition of the synthesized nanoparticles from TGA. The morphological study using SEM showed the formation of hexagonal shaped, well dispersed nanoparticles. The cytocompatibilty of the iron oxide nanoparticles was studied using MTT assay and haemolytic analysis. The antimicrobial activity of the nanoparticles against E. coli, S. aureus, B.subtilis, Shigella, A.niger and Candida albicans were measured and the nanoparticles showed significant activity against all the microorganisms which increased with increase in the nanoparticle concentration. The free radical scavenging activity of the nanoparticles against DPPH, Hydrogen peroxide and hydroxyl radical was performed which showed efficient antioxidant activity.

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Section: Morphological and Elemental Analysissupporting

confidence: 75%

Biogenic synthesis of magnetic iron oxide nanoparticles using inedible borassus flabellifer seed coat: characterization, antimicrobial, antioxidant activity and in vitro cytotoxicity analysis

Sandhya

Kalaiselvam

2020

Mater. Res. Express

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“…leaves' extracts. The reducing ability of the plant extract was investigated using a ferric reducing antioxidant power (FRAP) assay and color development tests as described by Manquián et al 33 and Wei et al 34 (Text-S3 †). During the FRAP assay, the ability of the plant extract, to reduce Fe 3+ to Fe 2+ is measured at an absorbance of l ¼ 593 nm by producing a blue complex with tripyridyltriazine (TPTZ).…”

Section: Preparation Of Fraxinus Chinensismentioning

confidence: 99%

“…In addition, different color development tests were employed to investigate the presence of the probable organic contents in the leaves' extracts that can reduce Fe 3+ to Fe 2+ . 34 2.2.3 Evaluation of the total phenolic content (TPC) of the F. chinensis Roxb. leaves' extracts.…”

Section: Preparation Of Fraxinus Chinensismentioning

confidence: 99%

Sorption of cationic malachite green dye on phytogenic magnetic nanoparticles functionalized by 3-marcaptopropanic acid

Ali

Peng

et al. 2018

RSC Adv.

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“…Due to the different chemical properties of chromium (VI) and chromium (III), chemical precipitation [13], coagulation [14], and chemical reduction [15,16] are often used to remove chromium (VI). Additionally, some biological treatments [17,18] (phytoremediation [19]) are also applied to remove chromium (VI) in waste water and groundwater. Lead sulfate as a precipitation is used to precipitate chromium (VI) and it can remove chromium (VI) from 0.2 mol/L to 0.15 mmol/L, as shown in a recent study [13], but lead sulfate is a second pollutant, which is harmful for the environment.…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Hexavalent Chromium from Wastewater with Electro-Reduction

et al. 2019

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Removal of hexavalent chromium had attracted much attention as it is a hazardous contaminant. An electrocoagulation-like technology electro-reduction was applied. The chromium (VI) in the wastewater was reduced to chromium (III) by the electron supplied by electricity power and Fe2+, formed from corrosion of steel electrodes in acidic conditions. The mechanism and parameters affecting the reaction were investigated. The results optimized by response surface methodology indicated that the influence of single factor on the reduction efficiency followed the order: A: dosage of H2SO4 > C: reaction time > D: reaction temperature > B: current intensity. The reduction efficiency was hardly affected by current intensity, while it was increased with the increasing of reaction time and acid concentration. The reducing agent, Fe2+ an and extra free electron, acted as a reducing agent and could easily reduce hexavalent chromium to trivalent chromium at high temperatures in an acidic medium.

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Biosynthesized iron nanoparticles in aqueous extracts of Eichhornia crassipes and its mechanism in the hexavalent chromium removal

Cited by 120 publications

References 32 publications

Biogenic synthesis of magnetic iron oxide nanoparticles using inedible borassus flabellifer seed coat: characterization, antimicrobial, antioxidant activity and in vitro cytotoxicity analysis

Biogenic synthesis of magnetic iron oxide nanoparticles using inedible borassus flabellifer seed coat: characterization, antimicrobial, antioxidant activity and in vitro cytotoxicity analysis

Sorption of cationic malachite green dye on phytogenic magnetic nanoparticles functionalized by 3-marcaptopropanic acid

Efficient Removal of Hexavalent Chromium from Wastewater with Electro-Reduction

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