Akademik Veri Yönetim Sistemi
Karbala International Journal of Modern Science, cilt.11, sa.1, ss.99-112, 2025 (Scopus)
Phenolic compounds from olive mill wastewater (PCO) of Algerian origin were used to produce sodium alginate-based active films using the casting method. The effects of adding various concentrations of PCO (0%, 0.1%, and 0.2% w/ v) were evaluated regarding the molecular, morphological, thermal, physicochemical, optical, barrier, biodegradability, antimicrobial, and antioxidant properties of the alginate films. The FTIR and SEM results elucidated the development of a coherent cross-linked structure attributed to hydrogen bonding interactions between PCO and alginate chains. Consequently, the films exhibited enhanced crystallinity and thermal stability, as revealed by DSC analysis. Moreover, PCO addition positively influenced several film properties, including color attributes. As the PCO concentration increased from 0% to 0.2%, significant improvements were observed in tensile strength, thickness, phenolic content, and opacity, with maximum values reaching 19.666 MPa, 0.107 mm, 80.264 mg/g, and 0.869, respectively. Additionally, the water barrier capacity and oxidative stability of sunflower oil improved significantly, with the lowest values of 0.009 kg cm m¡2 kPa¡1d¡1 and 8.94 meq/Kg observed at a 0.2% PCO concentration. On the other hand, the film exhibited biodegradability, as evidenced by water resistance tests. The results showed that sodium alginate film coating containing PCO exhibited good anti-foodborne pathogen capacities against Escherichia coli, Listeria monocytogenes, and Salmonella enterica with an inhibition zone between 14.6 and 19.6 mm, as well as a significant enhancement of antioxidant properties (79.506e98.682%) was observed. In conclusion, sodium alginate-based active films incorporated with PCO have demonstrated intriguing properties, making them suitable for food packaging.