Application of Shrimp Waste for the Synthesis of Polyurethane-Chitosan Materials with Potential Use in Sorption of Oil Micro-Spills in Water Treatment

Shrimp waste is a common waste in seafood processing. It is used as part of the fish meal which is added to feed. Bearing in mind the Green Deal and sustainability development, it was proposed to use northern prawn shells to obtain chitosan (Ch), which could then be used for polyurethane (PUR) modification. In ports, oil micro-spills often flow into the waters of gulfs and, consequently, into the sea. Systematic chemical and petroleum water pollution may pose a threat to flora and fauna. In this study, chitosan, which was obtained from shrimp shells, was used to synthesize polyurethane-chitosan foams (PUR+Ch) with different chitosan concentrations. Selected physico-chemical and sorption properties in relation to oil and water of these materials were determined. It was found that the amount of Ch added to the foam affected its morphology, hardness, density, and thermal and sorption properties. PUR foam with a 1.5% weight of Ch was characterized as having the highest water and oil sorption. The advantages of the tested material as an innovative product with potentially significant proecological values were estimated using strengths-weaknesses-opportunities-threats (SWOT) analysis. The conducted preliminary research made it possible to demonstrate the use of these materials in the processes of water treatment with the mentioned micropollutants.

Automated summary

The study synthesized polyurethane-chitosan foams using chitosan obtained from shrimp shells, finding that the amount of Ch added affected the foam's properties, with 1.5% Ch resulting in the highest water and oil sorption. The SWOT analysis assessed the potential ecological value of the tested material as an innovative product.