Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk

Partnerzy

Paulina Mieldzioć

Uniwersytet Warszawski (PL)


Ostatnie publikacje
1.  Mieldzioć P., Tymkiewicz R., Sołek J., Secomski W., Litniewski J., Fita P., Reaction kinetics of sonochemical oxidation of potassium hexacyanoferrate(II) in aqueous solutions, Ultrasonics Sonochemistry, ISSN: 1350-4177, DOI: 10.1016/j.ultsonch.2019.104912, Vol.63, pp.104912-1-8, 2020

Streszczenie:
We studied sonochemical reactions resulting from ultrasonic treatment of potassium hexacyanoferrate(II) in aqueous solutions using a custom-built apparatus working at 536 kHz. We concluded that primary reactions are completely dominated by oxidation of Fe(II) to Fe(III) and did not find any evidences for degradation of cyanide. At the highest concentration used in the present study (0.1 M) we detected formation of pentacyanoaquaferrate(II) complex, which is most probably formed in reactions between hexacyanoferrate(III) anions and hydrogen atoms or hydrated electrons formed in sonochemical processes. We also determined that hydroxyl radicals formation rate in our system, (8.7 ± 1.5)∙10^-8 M∙s^-1, is relatively high compared to other reported experiments. We attribute this to focusing of the ultrasonic wave in the sample vessel. Finally, we suggest that oxidation rate of hexacyanoferrate(II) anions can be a convenient benchmark of efficiency of sonochemical reactors.

Słowa kluczowe:
sonochemistry, sonooxidation, sonoreactor, advanced oxidation processes, waste-water treatment

Afiliacje autorów:
Mieldzioć P. - Uniwersytet Warszawski (PL)
Tymkiewicz R. - IPPT PAN
Sołek J. - Uniwersytet Warszawski (PL)
Secomski W. - IPPT PAN
Litniewski J. - IPPT PAN
Fita P. - Uniwersytet Warszawski (PL)
140p.

Kategoria A Plus

IPPT PAN

logo ippt            ul. Pawińskiego 5B, 02-106 Warszawa
  +48 22 826 12 81 (centrala)
  +48 22 826 98 15
 

Znajdź nas

mapka
© Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk 2021