Phụ phẩm xương cá là nguồn thu nhận hydroxyapatite (HAp) khá dồi dào. Việc điều chế HAp từ xương cá không những góp phần nâng cao giá trị phụ phẩm mà còn giảm thiểu tác động tiêu cực đến môi trường. Trong nghiên cứu này, nano hydroxyapatite được thu nhận thành công từ xương cá chẽm Lates calcarifer thu mua từ công ty xuất khẩu thủy hải sản ở Khánh Hòa. Xương cá được xử lí kiềm và sau đó được nung ở 600oC trong các khoảng thời gian khác nhau là 1, 2 và 4 giờ. | Vietnam Journal of Marine Science and Technology Vol. 20 No. 4A 2020 173 186 DOI https 1859-3097 15659 http jmst Certain properties of nanohydroxyapatite obtained from Lates calcarifer fish bone Le Ho Khanh Hy Dao Viet Ha Pham Xuan Ky Nguyen Phuong Anh Phan Bao Vy Doan Thi Thiet Institute of Oceanography VAST Vietnam E-mail lehokhanhhy@ Received 28 August 2020 Accepted 26 October 2020 2020 Vietnam Academy of Science and Technology VAST Abstract Fish bone by-products are considered as abundant source of hydroxyapatite HAp . The preparation of HAp from fish bones not only contributes to improving the value of by-products but also minimizes negative impacts on the environment. In this study nanohydroxyapatite was successfully obtained from Lates calcarifer fish bone purchased from seafood export company in Khanh Hoa province. Fish bones were under alkali treatment and then heated at 600oC within different time intervals of 1 2 and 4 hours. Analysis of XRD and SEM showed that the calcium formed was completely single-phase and possessed an average size of 50 64 nm depending on the calcination time. The results of the Ca P molar ratio from to prove that the nano-HAp powders are B-type biological hydroxyapatites which has been confirmed by FTIR spectrum. In addition the content of heavy metals such as As Pb Hg Cd is detected within safety limits. These properties allow nano-HAp powders to be applied in food and medicine fields. Keywords Bone Lates calcarifer fish 600oC 1 2 4 hours nanohydroxyapatite B-type biological hydroxyapatites. Citation Le Ho Khanh Hy Dao Viet Ha Pham Xuan Ky Nguyen Phuong Anh Phan Bao Vy Doan Thi Thiet 2020. Certain properties of nanohydroxyapatite obtained from Lates calcarifer fish bone. Vietnam Journal of Marine Science and Technology 20 4A 173 186. 173 Tạp chí Khoa học và Công nghệ Biển Tập 20 Số 4A 2020 173 186 DOI https 1859-3097 15659 http
