Biosorption of Heavy Metals with Kelp
Kelp was investigated as a biosorbent for removal of heavy metals in this research. The results of biosorption column operations indicated that kelp has relatively high biosorption capacities for heavy metals of Cd, Cu, Ni, and Zn in aqueous solution. The breakthrough biosorption capacities of kelp for the investigated heavy metals varied in the range from 1.04 to 1.40 meq/g. The ultimate biosorption capacities were in the range of 1.60 to 1.91 meq/g. The cation complex stability and binding affinity of kelp for the investigated heavy metals was in the order of Cd > Cu > Ni > Zn. The leaching of light metals from biosorbent kelp was observed in the sequence of K < Na < Mg < Ca. The results in this research supported that ion exchange is the principal mechanism in the biosorption of heavy metals with kelp. Both weakly acidic carboxyl groups in alginic acids and strong acidic sulfate groups in fucoidin in biosorbent kelp contributed the most of the exchange sites for heavy metals ions. The biosorbent kelp behaves just as an ion exchanger to make a rapid and effective heavy metal uptake. The well-established ion exchange theory was used to develop the mathematical biosorption model for column operations. The concentration histories simulated by the biosorption model matched very well with the experimental results of biosorption column operations. The saturated kelp can be easily regenerated by hydrochloric acid for the potential recovery of heavy metals and the reuse of biosorbent kelp.
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: 2007-10-01
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 These proceedings are not peer reviewed.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