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Aerobic granules: a novel zinc biosorbent
1Environmental Engineering Research Centre, School of Civil and Environmental Engineering, Nanyang Technological University, Singapore. cyliu@ntu.edu.sg
Letters in Applied Microbiology
|December 4, 2002
Summary
Aerobic granules effectively remove Zn(II) from industrial wastewater. The biosorption kinetics depend on the ratio of initial Zn(II) to granule concentration, enabling efficient heavy metal removal.
Area of Science:
- Environmental Science
- Biotechnology
- Chemical Engineering
Background:
- Aerobic granules are microbial aggregates with porous structures.
- Potential application of aerobic granules as biosorbents for heavy metal removal from industrial wastewater.
Purpose of the Study:
- Investigate the effects of initial Zn(II) and aerobic granule concentrations on Zn(II) biosorption kinetics.
- Determine the optimal conditions for Zn(II) removal using aerobic granules.
Main Methods:
- Utilized acetate-fed aerobic granules (1.0 mm diameter) as biosorbents.
- Analyzed the kinetics of Zn(II) biosorption under varying initial Zn(II) and granule concentrations.
Main Results:
- Zn(II) biosorption kinetics are influenced by both initial Zn(II) and granule concentrations.
- The ratio of initial Zn(II) concentration (Co) to initial granule concentration (Xo) is the key factor driving biosorption.
- Maximum Zn(II) biosorption capacity reached 270 mg g(-1).
Conclusions:
- Aerobic granules are effective biosorbents for efficient removal of Zn(II) and other heavy metals from industrial wastewater.
- This research paves the way for developing novel, compact aerobic granule-based biosorbents for wastewater treatment.