Title:Identification, Interaction and Detection of Microplastics on Fish Scales
(Lutjanus gibbus)
Volume: 18
Issue: 5
Author(s): Preethika Murugan, Gayathri Jeevanandham and Ashok K. Sundramoorthy*
Affiliation:
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur-603 203, Tamil Nadu, India
- Department of Prosthodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical
Sciences, Poonamallee High Road, Velappanchavadi, Chennai, 600077, Tamil Nadu, India
Keywords:
Fish scale, polyethylene, FT-IR, sorption, microplastics, water pollution.
Abstract: Background: Microplastics are found to be one of the major emerging contaminants in
the environment. Various environmental occurrences cause the macro plastics to degrade slowly
into microplastics. Microplastics present in the water bodies may enter into the fish’s body through
ingestion of food and also get adsorbed onto the surface of their gills or skin.
Objective: Microplastics of polyethylene were chosen to investigate their sorption capacity on fish
scales. The dispersion of polyethylene microplastics was studied by using a Total Dissolved Solids
meter. Using this dispersion, the sorption effect was studied, and it revealed that the microplastics
had the sorption ability on the fish scales.
Method: Polyethylene microplastics were chosen to investigate its sorption capacity on fish scales
of Lutjanus gibbus. The sorption effect of microplastics on fish scales was performed by using
polyethylene microplastics obtained by bath sonication, and the concentration was studied using a
Total Dissolved Solids meter. Using polyethylene microplastics dispersion, the sorption effect was
carried out on the scales of Lutjanus gibbus for ten days at 8 oC. The sorption of microplastics on
fish scales was characterized by FE-SEM, FT-IR, and Raman spectroscopy.
Results: Polymer sorption was confirmed by using optical microscopy and FE-SEM. FT-IR and
Raman spectroscopy confirmed the existence of polyethylene microplastics on the fish scale.
Moreover, polyethylene microplastics sorption studies were also studied at different pH, various
concentrations of NaCl and at different time intervals.
Conclusions: We synthesized microplastics from the bulk polyethylene by NaCl solution. This
study confirmed the successful sorption of polyethylene microplastics on the fish scale. Our study
revealed that marine water might be a suitable medium to facilitate the polymer sorption on aquatic
animals/organisms.