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Removal of boron from aqueous solution by using neutralized red mud
Yunus Cengeloglu1, Ali Tor, Gulsin Arslan
1Selcuk University, Department of Chemistry, Campus, 42031 Konya, Turkey.
Journal of Hazardous Materials
|September 22, 2006
Summary
Neutralized red mud effectively removes boron from water. The Freundlich isotherm model accurately describes boron adsorption, which reaches equilibrium within 20 minutes across a wide pH range.
Area of Science:
- Environmental Science
- Water Treatment Technologies
- Adsorption Science
Background:
- Boron contamination in aqueous solutions poses environmental and health risks.
- Red mud, a byproduct of alumina production, is an abundant and low-cost material.
- Effective and economical methods for boron removal are crucial for water purification.
Purpose of the Study:
- To investigate the adsorptive removal efficiency of neutralized red mud for boron.
- To explore the influence of key parameters on boron adsorption.
- To evaluate the suitability of adsorption isotherm models for describing the process.
Main Methods:
- Batch equilibration technique was employed for adsorption studies.
- Experiments were conducted to assess the effects of pH, adsorbent dosage, initial boron concentration, and contact time.
- Adsorption data were fitted to Langmuir and Freundlich isotherm models.
Main Results:
- Boron removal showed minimal fluctuation within a pH range of 2-7.
- Adsorption equilibrium was achieved in approximately 20 minutes.
- The Freundlich isotherm model provided a better fit to the experimental sorption data compared to the Langmuir model.
Conclusions:
- Neutralized red mud is a promising adsorbent for boron removal from aqueous solutions.
- The adsorption process is relatively rapid and effective over a broad pH range.
- The Freundlich model effectively describes the boron adsorption mechanism onto neutralized red mud.
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