Synthesis and characterization of ecofriendly silver nanoparticles combined with yttrium oxide (Ag-Y2O3) nanocomposite with assorted adsorption capacity for Cu(II) and Cr(VI) removal: A mechanism perspective

Pradhan, Saswat Kumar; Pareek, Vikram; Panwar, Jitendra; Gupta, Suresh

doi:10.1016/j.jwpe.2019.100917

Cited by 28 publications

(10 citation statements)

References 89 publications

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“…An increase in exposure to chromium results to cancer, asthma, diarrhea. Liver defect, kidney problems and brain defect leading to physiological impairment 7 , 8 . The presence of iron above tolerable limit in wastewater have been reported to be carcinogenic and causes intestinal damage and irritation of respiratory tract 9 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) ions by KIAgNPs decorated MWCNTs in a batch and fixed bed process

Egbosiuba

Abdulkareem

Kovo

et al. 2021

Sci Rep

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The efficient removal of toxic metals ions from chemical industry wastewater is considered problematic due to the existence of pollutants as mixtures in the aqueous matrix, thus development of advanced and effective treatment method has been identified as a panacea to the lingering problems of heavy metal pollution. In this study, KIAgNPs decorated MWCNTs nano adsorbent was developed using combination of green chemistry protocol and chemical vapor deposition techniques and subsequently characterized using UV–Vis, HRTEM, HRSEM, XRD, FTIR and XPS. The adsorptive efficiency of MWCNTs-KIAgNPs for the removal of Cr(VI), Ni(II), Fe(II), Cd(II) and physico-chemical parameters like pH, TDS, COD, BOD, nitrates, sulphates, chlorides and phosphates from chemical industrial wastewater was examined in both batch and fixed bed systems. The result exhibited successful deposition of KIAgNPs on the surface of MWCNTs as confirmed by the microstructures, morphology, crystalline nature, functional groups and elemental characteristics of the MWCNTs-KIAgNPs. Optimum batch adsorption parameters include; pH (3 for Cr(VI) and 6 for Ni(II), Fe(II) and Cd(II) ions), contact time (60 min), adsorbent dosage (40 mg) and temperature (318 K). The binding capacities were obtained as follows; Cr6+ (229.540 mg/g), Ni2+ (174.784 mg/g), Fe2+ (149.552) and Cd2+ (121.026 mg/g), respectively. Langmuir isotherm and pseudo-second order kinetic model best described the experimental data in batch adsorption, while the thermodynamic parameters validated the chemisorption and endothermic nature of the adsorption process. In continuous adsorption, the metal ions were effectively removed at low metal influent concentration, low flow rate and high bed depth, whereby the experimental data were designated by Thomas model. The high physico-chemical parameters in the wastewater were successfully treated in both batch and fixed bed systems to fall within WHO permissible concentrations. The adsorption/desorption study illustrated over 80% metal removal by MWCNTs-KIAgNPs even after 8th adsorption cycle. This study demonstrated excellent performance of MWCNTs-KIAgNPs for chemical industry wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) ions by KIAgNPs decorated MWCNTs in a batch and fixed bed process

Egbosiuba

Abdulkareem

Kovo

et al. 2021

Sci Rep

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“…Additionally, they are being added to skin creams, wound dressings, antiseptic fabrics and sprays on account of their wide antiseptic properties 8 . Moreover, it was proved that AgNPs in addition to other materials such as hydroxyapatite or yttrium oxide have the ability to purify water from the heavy metals and several organic matters 9 , 10 . The size of the global market of AgNPs increased markedly, the global market revenue grows from 1.1 billion USD in 2016 to expected value of 3.0 billion USD by 2021 11 .…”

Section: Introductionmentioning

confidence: 99%

Polyphenols profile of pomegranate leaves and their role in green synthesis of silver nanoparticles

Swilam

Nematallah

2020

Sci Rep

113

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The current study reports on polyphenols profile of pomegranate leaves (PL) Punica granatum grown in Egypt and exhibiting their role in development of an eco-friendly method of green synthesis of silver nanoparticles (AgNPs). PL aqueous alcohol extract was fractionated, the major phenolic compound was isolated from the polyphenols rich fraction (ethyl acetate fraction) and identified by conventional and spectroscopic methods of analysis as ellagic acid. Furthermore, the fraction was standardized and analysed using UPLC-PDA-UV and LC–MS-MS techniques revealing tentative identification of 23 polyphenolic compounds, quantifying ellagic acid as 43.14 ± 0.57 μg/mg of the fraction. AgNPs were successfully synthesized with the aid of polyphenols rich fraction. This is the first report revealing the systematic optimization of the green synthesis process using various independent variables. AgNPs were characterized by adopting UV–Vis spectroscopy, FTIR, XRD, and SEM, which revealed strong SPR band within average of λ max 425 nm and polygonal shaped nanoparticles of 26.22 nm size, respectively. The antimicrobial efficacies of AgNPs and polyphenols rich fraction were tested against Gram-positive bacteria (Bacillus subtilis, Staphylococcus aureus, and Sarcina lutea), Gram-negative bacteria (Salmonella paratyphi, Escherichia coli, and Pseudomonas aeruginosa) and fungi (Candida albicans). AgNPs showed a concentration-dependent activity against all the tested microorganisms.

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“…En los últimos años han sido empleadas varias alternativas para mejorar la estrategia de síntesis, las cuales están asociadas al uso de diversas fuentes de energía como la irradiación de microondas o el ultrasonido en ausencia de disolvente. Entre estas innovaciones, la irradiación de microondas se ha utilizado ampliamente debido a su simplicidad operativa, sus velocidades de reacción mejoradas y su gran selectividad (Pradhan et al, 2019).…”

Section: Generalidades De Las Bases De Schiffunclassified

“…Materiales similares han sido empleados para la síntesis de nanopartículas de plata combinadas con óxido de itrio (Ag-Y2O3), utilizando úrea como material combustible. Estos nanocompuestos mostraron ser térmicamente estables, asimétricos y bien distribuidos sin ninguna agregación, además de que su aplicabilidad para la eliminación múltiple de metales pesados de soluciones acuosas se probó realizando experimentos para Cu (II) y Cr (VI), evidenciando una reducción en el porcentaje de eliminación de Cu (II) (98,5 a 93%) y Cr (VI) (98,3 a 95,1%) (Pradhan et al, 2019). La síntesis hidrotérmica de un producto de valor agregado del ácido metacrílico (MAA), realizada a través de la decoxilación catalizada por Co (II) de ácido itacónico (IA), junto con la formación de dos Co (II)-MOFs basados en algunas bases de Schiff, ha permitido evidenciar que los MOFs son estables al agua, fluorescentes y exhiben una estructura de detección de cationes regulados como Fe 3+ y Hg 2+ con una selectividad muy alta, sensibilidad entre 10-100 ppb y buena reutilización (Thakur, Pandey & Pandey, 2019).…”

Section: Aplicación De Bases De Schiff Para El Diseño De Materiales Con Potencial Uso En Remediación De Fuentes Hídricasunclassified

Sinergismo para la solución de problemas ambientales: remediación de fuentes hídricas mediante el empleo de bases de Schiff

2020

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Las fuentes de agua potable, necesarias para garantizar la salud de los seres vivos y el medioambiente, son cada vez más escasas. Esta grave problemática exige el desarrollo de nuevas tecnologías eco-amigables que permitan el monitoreo de metales pesados, la prevención y, especialmente, la remediación de fuentes hídricas contaminadas. Dada la necesidad de orientar las investigaciones hacia el diseño de materiales capaces de retener o facilitar la eliminación de contaminantes con alta eficiencia y efectividad, en este artículo se presentan algunos de los últimos avances respecto al desarrollo de nuevos métodos de remediación de agua empleando bases de Schiff, una familia de moléculas de gran importancia en química. Los resultados de estas investigaciones demuestran su capacidad quelatante y como agente catalizador, en especial, su potencial aplicación para fines ambientales, siendo aún un conjunto de investigaciones incipien-tes, con mucho por explorar en este campo de la ciencia y la ingeniería.

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Synthesis and characterization of ecofriendly silver nanoparticles combined with yttrium oxide (Ag-Y2O3) nanocomposite with assorted adsorption capacity for Cu(II) and Cr(VI) removal: A mechanism perspective

Cited by 28 publications

References 89 publications

Adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) ions by KIAgNPs decorated MWCNTs in a batch and fixed bed process

Adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) ions by KIAgNPs decorated MWCNTs in a batch and fixed bed process

Polyphenols profile of pomegranate leaves and their role in green synthesis of silver nanoparticles

Sinergismo para la solución de problemas ambientales: remediación de fuentes hídricas mediante el empleo de bases de Schiff

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