Biosorptive flotation for metal ions recovery

Area of Science:

• Environmental Science
• Biotechnology
• Chemical Engineering

Background:

• Industrial wastewater often contains toxic metal ions.
• Biomass is a cost-effective and sustainable material for metal ion biosorption.
• Efficient separation of metal-loaded biomass is crucial for water treatment processes.

Purpose of the Study:

• To investigate the use of flotation for separating metals-loaded biomass.
• To evaluate the effectiveness of Streptomyces rimosus as a biosorbent for metal ions.
• To explore the potential for biosorbent reuse and water recycling.

Main Methods:

• Biosorption of metal ions using industrial non-living biomass, focusing on Streptomyces rimosus.
• Solid/liquid separation of metal-loaded biomass via flotation.
• Optimization of flotation parameters including solution pH, surfactant type and concentration, and biomass modification.

Main Results:

• Flotation successfully achieved solid/liquid separation of metals-loaded biomass.
• Streptomyces rimosus demonstrated effectiveness as a biosorbent for metal ions.
• The biosorbent was successfully reused and recycled after elution.
• Cleaned water was obtained as the underflow from the flotation process.

Conclusions:

• Flotation is a viable technique for harvesting metal-loaded biomass after biosorption.
• The biosorbent material, particularly Streptomyces rimosus, shows promise for metal ion removal.
• The study demonstrates a potential for sustainable water treatment through biosorption and flotation with biosorbent recycling.