A novel LaFeO3 synthesized by sodium diethylenetriamine pentamethylene phosphonate for degradation of diclofenac through peroxymonosulfate activation： Degradation pathways and mechanism study

2021 ◽  
Author(s):  
Shuaiqi Ning ◽  
Shuai Mao ◽  
Chun Liu ◽  
Mingzhu Xia ◽  
Fengyun Wang
Keyword(s):  
Metal Ions ◽  
Degradation Pathways ◽  
Mechanism Study ◽  
Diethylene Triamine ◽  
Perovskite Catalysts

In this paper, some perovskite catalysts LaFeO3 (LFO) were prepared by using the efficient chelating properties of sodium diethylene triamine pentamethylene phosphonate (DTPMP-2Na) to metal ions, and the best catalyst...

scholarly journals Chromium stress impact on Lemongrass grown in Over Burden Soil of Sukinda Chromite Ore Mine (Odisha), India.

2018 ◽  
Vol 7 (8) ◽  
pp. 2394 ◽  
Author(s):  
Deepak Kumar Patra ◽  
Chinmay Pradhan ◽  
Hemanta Kumar Patra
Keyword(s):  
Acetic Acid ◽  
Metal Ions ◽  
Chelating Agents ◽  
Accumulation Rate ◽  
Metal Bioavailability ◽  
Chromite Ore ◽  
Diethylene Triamine ◽  
Chromium Accumulation ◽  
Chromium Stress ◽  
Pot Culture

The pot culture experiments were carried out to study the toxicological changes in Lemongrass plants grown in varied percentage of Cr rich Over Burden Soil (OBS) with or without chelators such as Ethylene Diamine Tetra Acetic Acid (EDTA), Diethylene Triamine Penta Acetic Acid (DTPA), Citric Acid (CA), Salicylic Acid (SA) and metal ions (Zn and Mg). The toxicological impact of Cr on treated plants with reduced Transportation index (Ti) values indicated more root Chromium accumulation as compared to shoot. Shoot translocation of Cr as depicted by transportation index (Ti) values for different crops were enhanced with the application of chelating agents. The Bio-Concentration Factor (BCF) and Total Accumulation Rate (TAR) of Chromium were elevated with the supplementation of chelators and metal ions, thus, illustrated more metal bioavailability in plants.

Removal of heavy metal ions by biogenic hydroxyapatite: Morphology influence and mechanism study

2016 ◽  
Vol 90 (8) ◽  
pp. 1557-1562 ◽  
Author(s):  
Dandan Wang ◽  
Xiaomei Guan ◽  
Fangzhi Huang ◽  
Shikuo Li ◽  
Yuhua Shen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Mechanism Study ◽  
Morphology Influence ◽  
Biogenic Hydroxyapatite

scholarly journals Mechanism study on the effect of alkali metal ions on the formation of HCN as NOx precursor during coal pyrolysis

2019 ◽  
Vol 92 (3) ◽  
pp. 604-612 ◽  
Author(s):  
Ji Liu ◽  
Xiaolei Zhang ◽  
Qiang Lu ◽  
Alexander Shaw ◽  
Bin Hu ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Coal Pyrolysis ◽  
Mechanism Study

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

ELNES of Iron Compounds

1990 ◽  
Vol 48 (2) ◽  
pp. 28-29
Author(s):  
Hiroki Kurata ◽  
Kazuhiro Nagai ◽  
Seiji Isoda ◽  
Takashi Kobayashi
Keyword(s):  
Energy Loss ◽  
Metal Ions ◽  
Energy Resolution ◽  
Transition Metal Oxides ◽  
Local Symmetry ◽  
Iron Compounds ◽  
Fine Structures ◽  
Electron Energy Loss ◽  
Fe Ions ◽  
Electron Energy Loss Spectra

Electron energy loss spectra of transition metal oxides, which show various fine structures in inner shell edges, have been extensively studied. These structures and their positions are related to the oxidation state of metal ions. In this sence an influence of anions coordinated with the metal ions is very interesting. In the present work, we have investigated the energy loss near-edge structures (ELNES) of some iron compounds, i.e. oxides, chlorides, fluorides and potassium cyanides. In these compounds, Fe ions (Fe2+ or Fe3+) are octahedrally surrounded by six ligand anions and this means that the local symmetry around each iron is almost isotropic.EELS spectra were obtained using a JEM-2000FX with a Gatan Model-666 PEELS. The energy resolution was about leV which was mainly due to the energy spread of LaB6 -filament. The threshole energies of each edges were measured using a voltage scan module which was calibrated by setting the Ni L3 peak in NiO to an energy value of 853 eV.

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