2026-06-24T21:48:56Z https://meral.edu.mm/oai

oai:meral.edu.mm:recid/544 2021-12-13T02:25:31Z 1582963788001:1582966577571 user-ydbu

Extraction of Chitin and Chitosan from Waste Crab Shell for the Application of Wastewater Treatment U Soe Myint Daw Cho Lay Sint Mud crab (Scylla serrata) were collected from Sittwe, Rakhine State. The shell and operculum were removed from collected crabs. Only crab shells were thoroughly washed with water. Then washed crab shells were placed in an ice box overnight and dried in sun radiation for (7) days. After drying, crab shells were grounded into smaller pieces using a grinder and sieved with (60) mesh screen with vibratory sieve shaker to get crab shell powder. Physico-chemical characteristics of crab shell powder such as colour, odour, moisture content, solubility, calcium carbonate content, elemental composition (EDXRF) were then determined. The crab shell powder was further treated by demineralization with different concentrations of acetic acid, deproteinisation with sodium hydroxide, decolourization with sodium hypochloride for the extraction of chitin and then this extracted chitin was deactylated with sodium hydroxide and acetic acid for the extraction of chitosan. Characterizations of extracted chitin and chitosan were then analyzed by physico-chemical characteristics such as colour, odour, moisture content, solubility, calcium carbonate content, elemental composition (EDXRF), Fourier Transformed Infrared (FT-IR) Spectroscopy technique, and Thermogravimetric Analysis (TGA) Technique and compared with commercial chitosan powder for the application of textile wastewater treatment 2017 http://hdl.handle.net/20.500.12678/0000000544 https://meral.edu.mm/records/544