Removal of Ni(II) and Co(II) ions from aqueous solutions utilizing Origanum majorana-capped silver nanoparticles

Kazemi, Zeinab; Marahel, Farzaneh; Hamoule, Touba; Goodajdar, Bijan Mombeni

doi:10.5004/dwt.2021.26727

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…The interaction of AgNPs with these metal ions is explained as follows: The Cu 2+ ion possesses a high standard reduction potential (Eo), indicating that copper ions can oxidize Ag 0 . This reaction causes a color shift in the AgNPs from yellowish-brown to a very pale yellow, which is likely due to Ag NP aggregation [ 120 ]. For the Hg 2+ ion, the color disappearance in the silver nanoparticle solution is primarily attributed to a redox reaction involving Ag 0 and Hg 2+ , which have standard potentials of 0.8 V (Ag + /Ag) and 0.85 V (Hg 2+ /Hg) respectively [ 121 ].…”

Section: Resultsmentioning

confidence: 99%

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Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Ibrahim,

Taha,

Hagaggi

et al. 2024

BMC Chemistry

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This study marks a pioneering effort in utilizing Vachellia tortilis subsp. raddiana (Savi) Kyal. & Boatwr., (commonly known as acacia raddiana) leaves as both a reducing and stabilizing agent in the green “eco-friendly” synthesis of silver nanoparticles (AgNPs). The research aimed to optimize the AgNPs synthesis process by investigating the influence of pH, temperature, extract volume, and contact time on both the reaction rate and the resulting AgNPs' morphology as well as discuss the potential of AgNPs in detecting some heavy metals. Various characterization methods, such as UV–vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), Zeta sizer, EDAX, and transmitting electron microscopy (TEM), were used to thoroughly analyze the properties of the synthesized AgNPs. The XRD results verified the successful production of AgNPs with a crystallite size between 20 to 30 nm. SEM and TEM analyses revealed that the AgNPs are primarily spherical and rod-shaped, with sizes ranging from 8 to 41 nm. Significantly, the synthesis rate of AgNPs was notably higher in basic conditions (pH 10) at 70 °C. These results underscore the effectiveness of acacia raddiana as a source for sustainable AgNPs synthesis. The study also examined the AgNPs' ability to detect various heavy metal ions colorimetrically, including Hg2+, Cu2+, Pb2+, and Co2+. UV–Vis spectroscopy proved useful for this purpose. The color of AgNPs shifts from brownish-yellow to pale yellow, colorless, pale red, and reddish yellow when detecting Cu2+, Hg2+, Co2+, and Pb2+ ions, respectively. This change results in an alteration of the AgNPs' absorbance band, vanishing with Hg2+ and shifting from 423 to 352 nm, 438 nm, and 429 nm for Cu2+, Co2+, and Pb2+ ions, respectively. The AgNPs showed high sensitivity, with detection limits of 1.322 × 10–5 M, 1.37 × 10–7 M, 1.63 × 10–5 M, and 1.34 × 10–4 M for Hg2+, Cu2+, Pb2+, and Co2+, respectively. This study highlights the potential of using acacia raddiana for the eco-friendly synthesis of AgNPs and their effectiveness as environmental sensors for heavy metals, showcasing strong capabilities in colorimetric detection.

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Section: Resultsmentioning

confidence: 99%

“…The Cu 2+ ion possesses a high standard reduction potential (Eo), indicating that copper ions can oxidize Ag 0 . This reaction causes a color shift in the AgNPs from yellowish-brown to a very pale yellow, which is likely due to Ag NP aggregation [ 120 ].…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Ibrahim,

Taha,

Hagaggi

et al. 2024

BMC Chemistry

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“…During the production and use of 60 Co, a large amount of radioactive wastewater containing 60 Co will be produced. If not treated effectively and discharged directly into the environment, it will cause serious harm to humans and ecology such as aplastic anaemia and leukaemia [2]. For this reason, many methods were adopted to remove cobalt ions from wastewater, such as extraction [3], precipitation [4], membrane separation [1], sorption [2], etc.…”

Section: Introductionmentioning

confidence: 99%

“…If not treated effectively and discharged directly into the environment, it will cause serious harm to humans and ecology such as aplastic anaemia and leukaemia [2]. For this reason, many methods were adopted to remove cobalt ions from wastewater, such as extraction [3], precipitation [4], membrane separation [1], sorption [2], etc. Among them, sorption is considered to be one of the most simple and effective processes due to its high enrichment factor, low organic reagents consumption, and operational flexibility.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of a Novel Metal–Organic Frameworks-Based Ion-Imprinted Polymer for Effective Removal of Co(II) from Simulated Radioactive Wastewater

Lan

Yuan

et al. 2023

Polymers

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In this work, a novel metal–organic frameworks (MOFs)-based ion-imprinted polymer (MIIP) was prepared to remove Co(II) from simulated radioactive wastewater. The batch experiments indicated that the sorption was well described by the pseudo-second-order kinetic and Langmuir models, and it is monolayer chemisorption. The theoretical maximum sorption capacity was estimated to be 181.5 mg∙g−1, which is by far the reported maximum value of Co(II) sorption by the imprinted materials. The MIIP presented an excellent selectivity for Co(II) in the presence of common monovalent and divalent metal ions, and the selectivity coefficients were 44.31, 33.19, 10.84, 27.71, 9.45, 16.25, and 7.60 to Li(I), K(I), Mg(II), Ca(II), Mn(II), Ba(II), and Cd(II), respectively. The sorption mechanism was explored by X-ray photoelectron spectroscopy (XPS) technology and density functional theory (DFT) calculations, suggesting that Co(II) was adsorbed by the MIIP via the chelation of 4-vinylpyridine (VP) ligands with Co(II), which was a spontaneous process, and the optimal coordination ratio of VP to Co(II) was 6. This work suggested that the MIIP has a high sorption capacity and excellent selectivity for Co(II), which is of great significance for the selective separation of Co-60 from radioactive wastewater.

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Synthesized polyetheretherketone/polyvinylalcohol nanocomposite modified with zinc oxide nanoparticles: As an effective adsorbent for removal of arsenic (III) ion from wastewater

Cheraghi,

Abrishamkar,

Jahromi

et al. 2024

Desalination and Water Treatment

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Removal of Ni(II) and Co(II) ions from aqueous solutions utilizing Origanum majorana-capped silver nanoparticles

Cited by 6 publications

References 29 publications

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Synthesis and Application of a Novel Metal–Organic Frameworks-Based Ion-Imprinted Polymer for Effective Removal of Co(II) from Simulated Radioactive Wastewater

Synthesized polyetheretherketone/polyvinylalcohol nanocomposite modified with zinc oxide nanoparticles: As an effective adsorbent for removal of arsenic (III) ion from wastewater

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