Laboratory and pilot scale photodegradation of cyanide-containing wastewaters

• Autorzy: Dąbrowski B. , Hupka J. , Żurawska M. , Miller J. D.

Warianty tytułu

PL

Fotodegradacja cyjnków zawartych w ściekach w skali laboratoryjnei i w istalacji pilotowej

• Języki publikacji: EN

Abstrakty

EN

Cyanide degradation efficiency using advanced oxidation methods was investigated. Model cyanide solutions in TiO2/UV and H2O2/UV systems were degraded for different pH, temperature, gas phase, and kind of catalyst. Laboratory experiments of cyanide photodegradation were carried out in homogeneous UV/H2O2, and heterogeneous UV/TiO2 systems using different forms of catalyst. For the first time cyanide degradation using TiO2 supported on glass microspheres has been studied. Photodegradation of cyanide was enhanced by addition of hydrogen peroxide and copper ions. Almost 20 % increase in cyanide oxidation efficiency was observed for photocatalytical oxidation of copper cyanide complexes. Moreover, cyanide photodegradation in an Air Sparged Hydrocyclone (ASH) unit was examined.

PL

W pracy badano efektywność procesu degradacji cyjanków stosując odpowiednie metody utleniania. Roztwory modelowe cyjnków zawierające TiO2 i H2O2 były poddane fotodegradacji przy różnych warunkach pH, temperaturze, przy różnym składzie fazy gazowej i w obecności różnych katalizatorów. Doświadczenia laboratoryjne nad fotodegradacją cyjanków zostały wykonane w układzie homogennym UV/H2O2 i układzie heterogennym UV/TiO2 przy zastosowaniu różnych form katalizatora. Po raz pierwszy badano degradację cyjanków przy zastosowaniu jako katalizatora TiO2, który został naniesiony na szklane mirokulki. Fotodegradacja cyjanków wzrasta po dodaniu do układu nadtlenku wodoru i jonów miedzi. Prawie 20% wzrost w efektywności utlenienia cyjanków był zaobserwowany dla fotodegradacji cyjankowych kompleksów miedzi. Dodatkowo badano fotodegradację w specjalnym hydrocyklonie (air sarged hydrocyclone-ASH).

Słowa kluczowe

EN

cyanide; titanium dioxide; photodegradation; hydrogen peroxide

PL

fotodegradacja; cyjanki

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2005
• Tom: Vol. 39
• Strony: 229--248
• Opis fizyczny: bibliogr. 35 poz.

Twórcy

autor

Dąbrowski B.

• Department of Chemical Technology, Gdansk University of Technology, 80-952 Gdansk, Poland

autor

Hupka J.

• Department of Chemical Technology, Gdansk University of Technology, 80-952 Gdansk, Poland

autor

Żurawska M.

• Department of Chemical Technology, Gdansk University of Technology, 80-952 Gdansk, Poland

autor

Miller J. D.

• Department of Metallurgical Engineering, University of Utah, Salt Lake City, Utah 84112, USA

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