A novel radiation-induced grafting methodology to synthesize stable zerovalent iron nanoparticles at ambient atmospheric conditions

Ratnayake, Sanduni; Schild, Dieter; Mączka, Edward; Jartych, E.; Luetzenkirchen, Johannes; Kosmulski, Marek; Makehelwala, Madhubhashini; Weragoda, S. K.; Bandara, Athula; Wijayawardana, Ranjith; Chandrajith, Rohana; Indrarathne, S.P.; Weerasooriya, Rohan

doi:10.1007/s00396-016-3894-7

Cited by 5 publications

(8 citation statements)

References 46 publications

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“…The preparation and extensive characterization of the material has been previously reported [16]. For the present work, all chemicals used were of analytical grade.…”

Section: Methodsmentioning

confidence: 99%

“…Emerging of a broadband around 3300 cm -1 in the spectrum of nZVI adsorbed grafted fabric is due to the formation of hydrogen bonded O-H on the surface upon adsorption of nZVI. This observation suggests that nZVI adsorbed onto the surface via one O atom of the O-C-O moiety with monodentate confi guration while the other O atom, which is from the C=O group, participates in H-bonding [16]. Adsorption of nZVI to the polymer surface with the formation of a core-shell structure is evidenced by the appearance of new bands in the region 600-450 cm -1 due to Fe-O vibrations.…”

Section: Fourier-transform Infrared Spectroscopy (Ftir) Analysesmentioning

confidence: 98%

“…The material has been extensively characterized in the previous study [16]. Here, only those points that are relevant to the present study are briefl y reviewed.…”

Section: Characterization Of Data From Previous Studymentioning

confidence: 99%

“…The nZVI-water interface has been fully characterized by the 1-pK BSM as described in detail elsewhere [16]. …”

Section: Proton Titrations and Zeta Potentialmentioning

confidence: 99%

“…As an example, the stability of the active component (nZVI) may be a problem in the real-world application because the use of nZVI for environmental applications is challenging because of rapid formation of an oxide layer in the presence of oxygen. In our previous work, a procedure that would improve the applicability was developed [16]. The main objective of the previous work was to synthesize air-stable nZVI and enhance its stability by incorporating it into a radiation grafted NWPE/ PP polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

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Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Ratnayake¹,

Ratnayake²,

Schild

et al. 2017

Nukleonika

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Abstract. This research specifi cally focused on the development of a novel methodology to reduce excess nitrate in drinking water utilizing zerovalent iron nanoparticles (nZVI)-stabilized radiation-grafted copolymer matrix. nZVI was synthesized by borohydrate reduction of FeCl 3 and stabilized on acrylic acid (AAc)-grafted non-woven polyethylene/polypropylene (NWPE/PP-g-AAc) copolymer matrix, which was grafted using gamma radiation. The use of nZVI for environmental applications is challenging because of the formation of an oxide layer rapidly in the presence of oxygen. Therefore, radiation-grafted NWPE/PP synthetic fabric was used as the functional carrier to anchor nZVI and enhance its spreading and stability. The chemical reduction of nitrate by nZVI-adsorbed NWPE/PP-g-AAc (nZVI-Ads-NWP) fabric was examined in batch experiments at different pH values. At low pH values, the protective layers on nZVI particles can be readily dissolved, exposing the pure iron particles for effi cient chemical reduction of nitrate. After about 24 h, at pH 3, almost 96% of nitrate was degraded, suggesting that this reduction process is an acid-driven, surface-mediated process. The nZVI-water interface has been characterized by the 1-pK Basic Stern Model (BSM). An Eley-Rideal like mechanism well described the nitrate reduction kinetics. In accordance with green technology, the newly synthesized nZVI-Ads--NWP has great potential for improving nitrate reduction processes required for the drinking water industry.

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“…The preparation and extensive characterization of the material has been previously reported [16]. For the present work, all chemicals used were of analytical grade.…”

Section: Methodsmentioning

confidence: 99%

Section: Fourier-transform Infrared Spectroscopy (Ftir) Analysesmentioning

confidence: 98%

“…The material has been extensively characterized in the previous study [16]. Here, only those points that are relevant to the present study are briefl y reviewed.…”

Section: Characterization Of Data From Previous Studymentioning

confidence: 99%

“…The nZVI-water interface has been fully characterized by the 1-pK BSM as described in detail elsewhere [16]. …”

Section: Proton Titrations and Zeta Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Ratnayake¹,

Ratnayake²,

Schild

et al. 2017

Nukleonika

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Non-thermal Plasma Synergizes High-Alkalinity Hydroxyapatite Supported RhFe Bimetallic Catalyst for Direct Catalytic Decomposition of N2O at Low Temperature

et al. 2023

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Fabrication of the magnetic mesoporous silica Fe-MCM-41-A as efficient adsorbent: performance, kinetics and mechanism

Guo

Chen²,

Zhao

et al. 2021

Sci Rep

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Antibiotics are emerging pollutants and increasingly present in aquaculture and industrial wastewater. Due to their impact on the environment and health, their removal has recently become a significant concern. In this investigation, we synthesized nano zero-valent iron-loaded magnetic mesoporous silica (Fe-MCM-41-A) via precipitation and applied the adsorption of oxytetracycline (OTC) from an aqueous solution. The effects of competing ions such as Na+, Ca2+ and Cu2+ on the adsorption process under different pH conditions were studied in depth to providing a theoretical basis for the application of nanomaterials. The characterization of the obtained material through transmission electron microscopy demonstrates that the adsorbent possesses hexagonal channels, which facilitate mass transfer during adsorption. The loaded zero-valent iron made the magnetic, and was thus separated under an applied magnetic field. The adsorption of OTC onto Fe-MCM-41-A is rapid and obeys the pseudo-second-order kinetic model, and the maximum adsorption capacity of OTC is 625.90 mg g−1. The reaction between OTC and Fe-MCM-41-A was inner complexation and was less affected by the Na+. The effect of Ca2+ on the adsorption was small under acidic and neutral conditions. However, the promotion effect of Ca2+ increased by the increase of pH. Cu2+ decreased the removal efficiencies continuously and the inhibitory effects decrease varied with the increase of pH. We propose that surface complexing, ion-exchange, cationic π-bonding, hydrogen bonding, and hydrophobicity are responsible for the adsorption of OTC onto Fe-MCM-41-A.

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A novel radiation-induced grafting methodology to synthesize stable zerovalent iron nanoparticles at ambient atmospheric conditions

Cited by 5 publications

References 46 publications

Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix

Non-thermal Plasma Synergizes High-Alkalinity Hydroxyapatite Supported RhFe Bimetallic Catalyst for Direct Catalytic Decomposition of N2O at Low Temperature

Fabrication of the magnetic mesoporous silica Fe-MCM-41-A as efficient adsorbent: performance, kinetics and mechanism

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