Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Environment Protection Engineering

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: crystal violets

Sortuj według:

Ogranicz wyniki do:

Dye removal efficiency of virgin activated carbon and activated carbon regenerated with Fenton's reagent

Dąbek L., Ozimina E., Picheta-Oleś A.

Environment Protection Engineering

2012

Vol. 38, nr 1

5-13

The effectiveness of virgin and regenerated activated carbons was established for crystal violet removed from aqueous solutions. Granular activated carbon, WDex, saturated with the dye was regenerated using classic or modified Fenton's reagent, Fe2+/H2O2 and Fe2+/Ox, respectively. The application of modified Fenton's reagent resulted in the formation of hydrogen peroxide directly in the regeneration solution. The study was conducted under static and dynamic conditions. The sorptive capacities of virgin and regenerated WDex activated carbons for crystal violet were reported to be similar (approximately 42 mg/g). The results of the dynamic sorption show that under the predetermined conditions the regenerated activated carbons were better sorbents. The amount of dynamic sorption was approx. 17.6 g/dm3. The longest breakthrough time (3970 min) and the longest saturation time (11 600 min) were observed for the carbon bed regenerated with modified Fenton's reagent.

Decolourization of triphenylmethane dyes and ecotoxicity of their end products

Zabłocka-Godlewska E., Przystaś W., Grabińska-Sota E.

Environment Protection Engineering

2009

Vol. 35, nr 1

161-169

Common usage of dyes is always connected with pollution of surface water deposits. The goal of the research was to investigate the capability of bacteria and fungi as dyes decolourizing agents. The ecotoxicity of decolourization products was tested with Daphnia magna and Lemna minor. According to ACE 89/BE 2/D3 Final Report Commission EC, dye control samples were classified as toxic. High decolourization effectiveness was not always connected with detoxification. Crystal violet was the most difficult dye to remove (27-76% decolourization) and brilliant green, the easiest (62.5-88.6%). Thymol blue and cresol red were easily removed by fungi (>80%) and poorly by bacteria (<30%). Decolourization of these dyes was mostly connected with an increase of toxicity.

Powszechne stosowanie barwników prowadzi do zanieczyszczenia wód powierzchniowych. Celem badań było określenie możliwości dekoloryzacji barwników przez bakterie i grzyby. Ekotoksyczność produktów dekoloryzacji badano na Daphnia magna i Lemna minor. W oparciu o ACE 89/BE 2/D3 Final Report Commission EC próbki kontrolne z barwnikiem zaklasyfikowano jako toksyczne. Wysoka efektywność usunięcia barwnika nie zawsze wiązała się z detoksykacją próbek. Barwnikiem najtrudniej usuwanym był fiolet krystaliczny (usunięcie barwy 27-76%), a najłatwiej - zieleń brylantowa (62.5-88.6%). Błękit tymolowy i czerwień krezolowa były łatwo usuwane przez szczepy grzybowe (>80%), słabo natomiast przez bakterie (<30%). Dekoloryzacja tych barwników wiązała się ze wzrostem toksyczności.