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A physicochemical study of sugar palm (Arenga Pinnata) starch films plasticized by glycerol and sorbitol AIP Conference Proceedings 1711, 080003 (2016) (20, 30, 40 and 50% w/w starch). The film samples were stored for 1, 4 and 8 week at 25 o C under 52%RH. The results showed that there is an increasing tendency of thickness, moisture content, solubility, and elongation at break as glycerol concentration increased, whereas tensile strength decreased as glycerol concentration were raised. The moisture content and solubility of plasticized film initially increased after 1 week but decreased after 4 weeks of storage. Aging films affected to mechanical properties, increasing resistance but reducing their stretchability. The XRD results showed that the crystallinity of sample with various glycerol concentration tends to decrease after 8 weeks storage.

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The ability of raw and dried Sargassum duplicatum to remove methylene blue (MB) from aqueous solution was evaluated. Brown algae. S. duplicatum before and after MB adsorption was characterised by Fourier transform infrared spectroscopy (FT-IR). Batch experiments were conducted to examine the effects of parameters such as initial pH, biomass dosage, contact time, and initial dye concentration on MB Adsorption. The optimum adsorption was found at around pH 5, adsorbent dosage 1 g/L, and initial concentration of MB at 20 mg/L. Adsorption occurs very fast in first 5 min and reaches the equilibrium at 70 min. The maximum percentage of dye removal was 88,9%. This study suggests that S. duplicatum has good potential capacity to remove MB dye and could offer promising opportunity as a low-cost biosorbent.