National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Embelin, a naturally occurring benzoquinone isolated from the berries of Embelia ribes Burm. f., was investigated as a plant-derived photocatalyst for the degradation of Coomassie Brilliant Blue R-250 (CBB R-250). E. ribes is a medicinal plant traditionally used in various systems of medicine, and embelin is recognized as one of its major bioactive constituents (Lal and Mishra, 2013; Poojari, 2014). In the present study, embelin was isolated from dried berries by chloroform extraction and crystallization, and its identity was confirmed by thin-layer chromatography, FT-IR, and ^1H and ^13C NMR analyses. The isolated embelin was immobilized in a chitosan–agar matrix to enhance its photocatalytic efficiency. A 10-ppm solution of CBB R-250 was treated with free and immobilized embelin at 1 μg/mL under sunlight, and dye degradation was monitored spectrophotometrically at 590 nm. Free embelin showed 45% degradation after 70 min, whereas immobilized embelin exhibited markedly enhanced activity, achieving 96% degradation within the same period. The control treatments showed no appreciable degradation. The enhanced activity of immobilized embelin may be attributed to its improved distribution and increased surface availability within the chitosan–agar matrix (Roshitha et al., 2019). The novelty of the present study lies in demonstrating the photocatalytic application of isolated embelin from E. ribes for CBB R-250 degradation and in establishing chitosan–agar immobilization as an effective approach for substantially enhancing its dye-degradation efficiency. The findings highlight the potential of embelin as a natural, plant-derived photocatalyst for the eco-friendly treatment of dye-contaminated water.
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