ZERO-VALENT IRON PRETREATMENT FOR ENHANCING BIODEGRADABILITY OF AZO DYES IN WASTEWATER
Abstract:Azo dyes are a group of chemicals that are largely resistant to aerobic biodegradation and persist in wastewater treatment processes. It has been proposed that zero-valent iron (Fe0) can be used to reduce the azo bond, cleaving the dye molecule into products that are more amenable to mineralization by bacteria in activated sludge processes. Batch anaerobic reduction experiments have been performed for two sulfonated azo dyes, orange G and orange II, to determine reaction kinetics and to identify reduction products. Iron-treated dye solutions, as well as major reduction products (aniline and sulfanilic acid) were subjected to batch biodegradation tests and respirometric analyses to screen for enhanced biodegradability over parent dyes. Results indicate that treatment of orange G and orange II with scrap iron produces aniline and sulfanilic acid as major products that are completely mineralized by an acclimated culture within 24 hours.
Document Type: Research Article
Publication date: 2001-01-01
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 These proceedings are not peer reviewed.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