Curcumin-based-fluorescent staining and microfluidic detection of microplastics in wastewater effluent

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Microplastic pollution, particularly polyethylene (<10 μm), is a growing concern in wastewater effluent.
• Current detection methods often rely on synthetic dyes, posing environmental and health risks.
• There is a need for sustainable and efficient methods for microplastic identification in environmental samples.

Purpose of the Study:

• To develop a fast and eco-friendly method for detecting polyethylene microplastics in wastewater.
• To evaluate curcumin as a natural fluorescent dye for microplastic analysis.
• To demonstrate the efficacy of a microfluidic device for electrophoretic capture of stained microplastics.

Main Methods:

• Polyethylene microplastics (<10 μm) were stained with curcumin, a natural fluorescent dye.
• Fluorescence properties of stained microplastics were analyzed.
• A microfluidic device was employed for the electrophoretic capture of curcumin-stained microplastics.

Main Results:

• Curcumin staining resulted in strong green fluorescence of polyethylene microplastics.
• The microfluidic device successfully captured the stained microplastics via electrophoresis.
• The method proved to be fast and effective for detecting microplastics in wastewater effluent.

Conclusions:

• Curcumin is a suitable natural fluorescent dye for detecting polyethylene microplastics.
• This method provides a sustainable and eco-friendly alternative to synthetic dyes for microplastic detection.
• The developed technique offers a promising approach for environmental microplastic monitoring in wastewater.