Rhamnolipid: nature-based solution for the removal of microplastics from the aquatic environment

Area of Science:

• Environmental Science
• Biotechnology
• Water Treatment

Background:

• Microplastic pollution is a pervasive global issue affecting ecosystems and human health.
• Over 7,000 studies highlight microplastic presence in various environmental compartments and organisms.
• Current remediation efforts primarily focus on aquatic systems, necessitating innovative solutions.

Purpose of the Study:

• To investigate the efficacy of rhamnolipid, a biosurfactant, for microplastic removal from water.
• To evaluate the influence of water matrix, pH, alum, and rhamnolipid concentrations on removal efficiency.

Main Methods:

• Experimental evaluation of microplastic removal using rhamnolipid.
• Testing various parameters: pH (7.0-10.0), alum concentrations (5-50 mg/L), and rhamnolipid concentrations (1-100 mg/L).
• Assessment of removal efficiency in different water types.

Main Results:

• Optimal microplastic removal was achieved with 5.0 mg/L alum and 1.0 mg/L rhamnolipid at pH 8.0.
• A consistent removal efficiency of approximately 74% was observed in both tested water types.
• Rhamnolipid demonstrated significant potential in mitigating microplastic contamination.

Conclusions:

• Rhamnolipid shows considerable promise as a nature-based solution for microplastic remediation in surface waters.
• The study provides key parameters for optimizing rhamnolipid-based microplastic removal.
• Further research can explore scaling up this eco-friendly approach for broader application.