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| rdf:type
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| Description
| - Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and other organophosphates pesticides, chlorpyrifos, dichlofenthion, fenchlorphos, and prothiofos, as well as of some chemical warfare agents - nerve gases soman (VX). CeO2 specimens were prepared by calcination of basic cerous carbonate. The CeO2 samples containing certain amounts (1 wt.%?5wt.%) of the neighboring lanthanides (La, Pr, Nd) were prepared in a similar way from pure lanthanide salts. It was shown that ceria accelerated markedly the decomposition of parathion methyl causing the cleavage of the P-O-aryl bond in the pesticide molecule. The degradation times (reaction half-times) were in an order of minutes in the presence of CeO2, compared to hours or days under common environmental conditions. The reaction in suitable organic solvents allowed conversions of about 90% for parathion methyl loading of 20 mg pesticide/g CeO2 within 2 h with a reactant half-life in the order of 0.1 min. At optimum calcination temperature (about 773.15 K), the produced ceria retained a sufficiently high surface area, and attained an optimum degree of crystallinity (related to a number of crystal defects, and thus potential reactive sites). A fast organophosphate degradation was demonstrated not only in non-polar solvents (such as heptane), but also in polar aprotic solvents (acetonitrile, acetone) that are miscible with water. This opens new possibilities for designing more versatile decontamination strategies. The cleavage of phosphate ester bonds is of a great importance not only for the degradation of dangerous chemicals (chemical weapons, pesticides), but also for interactions of ceria in biologically relevant systems.
- Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and other organophosphates pesticides, chlorpyrifos, dichlofenthion, fenchlorphos, and prothiofos, as well as of some chemical warfare agents - nerve gases soman (VX). CeO2 specimens were prepared by calcination of basic cerous carbonate. The CeO2 samples containing certain amounts (1 wt.%?5wt.%) of the neighboring lanthanides (La, Pr, Nd) were prepared in a similar way from pure lanthanide salts. It was shown that ceria accelerated markedly the decomposition of parathion methyl causing the cleavage of the P-O-aryl bond in the pesticide molecule. The degradation times (reaction half-times) were in an order of minutes in the presence of CeO2, compared to hours or days under common environmental conditions. The reaction in suitable organic solvents allowed conversions of about 90% for parathion methyl loading of 20 mg pesticide/g CeO2 within 2 h with a reactant half-life in the order of 0.1 min. At optimum calcination temperature (about 773.15 K), the produced ceria retained a sufficiently high surface area, and attained an optimum degree of crystallinity (related to a number of crystal defects, and thus potential reactive sites). A fast organophosphate degradation was demonstrated not only in non-polar solvents (such as heptane), but also in polar aprotic solvents (acetonitrile, acetone) that are miscible with water. This opens new possibilities for designing more versatile decontamination strategies. The cleavage of phosphate ester bonds is of a great importance not only for the degradation of dangerous chemicals (chemical weapons, pesticides), but also for interactions of ceria in biologically relevant systems. (en)
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| Title
| - Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates
- Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates (en)
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| skos:prefLabel
| - Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates
- Cerium dioxide as a new reactive sorbent for fast degradation of parathion methyl and some other organophosphates (en)
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| skos:notation
| - RIV/44555601:13520/14:43886499!RIV15-MSM-13520___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/44555601:13520/14:43886499
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - rare earths; non-aqueous solvents; hydrolysis; chemical warfare agents; parathion methyl; organophosphate pesticide; lanthanides; carbonate precursor; cerium dioxide (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Kormunda, Martin
- Kuráň, Pavel
- Pilařová, Věra
- Šťastný, Martin
- Štengl, Václav
- Janoš, Pavel
- Ederer, Jakub
- Grygar, T. M.
- Došek, Marek
- Vrtoch, Ľuboš
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| http://linked.open...ain/vavai/riv/wos
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| issn
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| number of pages
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| http://bibframe.org/vocab/doi
| - 10.1016/S1002-0721(14)60079-X
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| http://localhost/t...ganizacniJednotka
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