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Separation and preconcentration of lead from aquatic environment using Microcystis--based biosorbent
1Department of Chemistry, Banaras Hindu University, Varanasi, India.
Environmental Technology
|August 17, 2001
Summary
A novel biofilm biosorbent made from Microcystis immobilized on silica gel effectively removes lead ions from water. This robust and recyclable material offers quantitative lead sorption for environmental monitoring.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Biotechnology
Background:
- Lead contamination in water poses significant environmental and health risks.
- Developing selective and robust materials for lead ion detection and removal is crucial.
- Microcystis, a naturally abundant cyanobacterium, possesses potential for biosorption applications.
Purpose of the Study:
- To develop a lead-selective, robust, and recyclable column packing material.
- To immobilize Microcystis biofilm on polymer-modified silica gel for enhanced performance.
- To evaluate the biosorbent's efficiency for trace lead ion preconcentration.
Main Methods:
- Immobilization of Microcystis biofilm on polymer-modified silica gel.
- Column packing material preparation and characterization.
- Sorption experiments using trace level lead ions in multielemental/natural water samples.
Main Results:
- The developed biosorbent demonstrated high selectivity and robustness, withstanding 70 recycling cycles.
- Quantitative lead ion sorption was achieved with a preconcentration factor of 83.
- Optimal conditions for lead sorption were identified as pH 5.0 and a flow rate of 1.0 ml min(-1).
Conclusions:
- The immobilized Microcystis biofilm on silica gel is a highly effective and recyclable biosorbent for lead.
- This material shows significant promise for preconcentrating trace lead ions in environmental water samples.
- The study highlights a sustainable approach for developing advanced materials for water quality monitoring.