Decolourization Of Drimarene Red Dye Using Palladized Bacterial Cellulose In A Reactor
The overall goal of the research project was to explore the possibility of using metallic palladium (Pd0) that has been irreversibly immobilized on bacterial cellulose (palladized bacterial cellulose) as a versatile and novel bio-inorganic catalyst to mediate reductive decolourization of a reactive textile dye, Drimarene Red dye in a rotating catalyst contact reactor (RCCR). Ninty percent of 100 mg L−1 of dye was decolourized at pH 2 after 25 min of reaction in RCCR using hydrogen as the reducing agent. Preliminary characterization of the bio-inorganic catalyst through scanning electron microscopy and energy dispersive X-ray spectroscopic analyses clearly suggested the irreversible impregnation of nano-sized Pd0 deposits within the bacterial cellulose fibrils. The kinetics of decolourization using varying initial concentrations of the selected textile dye, and effects of pH and RPM (revolutions per minute) on the rate of decolourization of dye were studied. The first order rate constant values were computed to be 0.086 min−1, 0.084 min−1, 0.083 min−1, 0.081 min−1 and 0.072 min−1 for 40 mg L−1, 60 mg L−1, 80 mg L−1, 100 mg L−1 and 150 mg L−1, respectively. The rate of decolourization remained unaffected by the speed of rotation of discs in RCCR and decreased significantly with the increase in pH of the reaction phase. UV-Visible absorption spectroscopy and liquid chromatography-mass spectroscopy suggested the accumulation of sulfanilic acid and other low molecular weight products possibly due to the cleavage of azo bonds in the dye molecule. Results obtained so far suggest that rotating catalyst contact reactor is simple and flexible with respect to: a) immobilization of bacterial cellulose onto rotating discs and b) in-situ reduction and immobilization of palladium onto bacterial cellulose and c) operation in batch or continuous flow mode. Irreversible immobilization of palladium and its extensive reusability is expected to reduce the cost of treatment process to a significant extent.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 January 2008
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites