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Hydrodechlorination of Different Chloroaromatic Compounds at Room Temperature and Ambient Pressure-Differences in Reactivity of Cu- and Ni-Based Al Alloys in an Alkaline Aqueous Solution

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F20%3A39916603" target="_blank" >RIV/00216275:25310/20:39916603 - isvavai.cz</a>

  • Výsledek na webu

    <a href="https://www.mdpi.com/2073-4344/10/9/994" target="_blank" >https://www.mdpi.com/2073-4344/10/9/994</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3390/catal10090994" target="_blank" >10.3390/catal10090994</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Hydrodechlorination of Different Chloroaromatic Compounds at Room Temperature and Ambient Pressure-Differences in Reactivity of Cu- and Ni-Based Al Alloys in an Alkaline Aqueous Solution

  • Popis výsledku v původním jazyce

    It is well known that the hydrodechlorination (HDC) of chlorinated aromatic contaminants in aqueous effluents enables a significant increase in biodegradability. HDC consumes a low quantity of reactants producing corresponding non-chlorinated and much more biodegradable organic compounds. Two commonly used precious metals free Al alloys (Raney Al-Ni and Devarda&apos;s Al-Cu-Zn) were compared in reductive action in an alkaline aqueous solution. Raney Al-Ni alloy was examined as a universal and extremely effective HDC agent in a diluted aqueous NaOH solution. The robustness of Raney Al-Ni activity is illustrated in the case of HDC of polychlorinated aromatic compounds mixture in actual waste water. In contrast, Devarda&apos;s Al-Cu-Zn alloy was approved as much less active for HDC of the tested chlorinated aromatic compounds, but with a surprisingly high selectivity on cleavage of C-Cl bonds in the meta and sometimes the ortho position in chlorinated aniline and sometimes chlorinated phenol structures. The reaction of both tested alloys with chlorinated aromatic compounds in the aqueous NaOH solution is accompanied by dissolution of aluminum. Dissolved Al in the alkaline HDC reaction mixture is very useful for subsequent treatment of HDC products by coagulation and flocculation of Al(OH)(3) caused by simple neutralization of the alkaline aqueous phase after the HDC reaction.

  • Název v anglickém jazyce

    Hydrodechlorination of Different Chloroaromatic Compounds at Room Temperature and Ambient Pressure-Differences in Reactivity of Cu- and Ni-Based Al Alloys in an Alkaline Aqueous Solution

  • Popis výsledku anglicky

    It is well known that the hydrodechlorination (HDC) of chlorinated aromatic contaminants in aqueous effluents enables a significant increase in biodegradability. HDC consumes a low quantity of reactants producing corresponding non-chlorinated and much more biodegradable organic compounds. Two commonly used precious metals free Al alloys (Raney Al-Ni and Devarda&apos;s Al-Cu-Zn) were compared in reductive action in an alkaline aqueous solution. Raney Al-Ni alloy was examined as a universal and extremely effective HDC agent in a diluted aqueous NaOH solution. The robustness of Raney Al-Ni activity is illustrated in the case of HDC of polychlorinated aromatic compounds mixture in actual waste water. In contrast, Devarda&apos;s Al-Cu-Zn alloy was approved as much less active for HDC of the tested chlorinated aromatic compounds, but with a surprisingly high selectivity on cleavage of C-Cl bonds in the meta and sometimes the ortho position in chlorinated aniline and sometimes chlorinated phenol structures. The reaction of both tested alloys with chlorinated aromatic compounds in the aqueous NaOH solution is accompanied by dissolution of aluminum. Dissolved Al in the alkaline HDC reaction mixture is very useful for subsequent treatment of HDC products by coagulation and flocculation of Al(OH)(3) caused by simple neutralization of the alkaline aqueous phase after the HDC reaction.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10511 - Environmental sciences (social aspects to be 5.7)

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Catalysts

  • ISSN

    2073-4344

  • e-ISSN

  • Svazek periodika

    10

  • Číslo periodika v rámci svazku

    9

  • Stát vydavatele periodika

    CH - Švýcarská konfederace

  • Počet stran výsledku

    21

  • Strana od-do

    994

  • Kód UT WoS článku

    000581326700001

  • EID výsledku v databázi Scopus

    2-s2.0-85093883743