| Title |
Hidroksiapatito sintezė panaudojant fosfogipso atliekas |
| Translation of Title |
Study of synthesis of hydroxyapatite using phosphogypsum waste. |
| Authors |
Jakubauskaitė, Viktorija ; Zeringytė, Milda ; Zukauskaitė, Audronė |
| DOI |
10.3846/aainz.2020.012 |
| ISBN |
9786094762413 |
| eISBN |
9786094762406 |
| Full Text |
|
| Is Part of |
Aplinkos apsaugos inžinerija : 23-iosios Lietuvos jaunųjų mokslininkų konferencijos „Mokslas – Lietuvos ateitis“ straipsnių rinkinys : 2020 m. gegužės 8 d. = Environmental protection engineering : proceedings of the 23th conference for junior researchers "Science – future of Lithuania" : 8 May 2020, Vilnius, Lithuania.. Vilnius : Technika, 2020. p. 74-79.. ISSN 2029-7157. eISSN 2029-7149. ISBN 9786094762413. eISBN 9786094762406 |
| Keywords [eng] |
calcium sulfate ; hydroxyapatite ; phosphogypsum ; phosphoric acid ; wastewater treatment |
| Abstract [eng] |
The production of phosphoric acid generates phosphorus gypsum waste. It is imposible to avoid this by-product therefore, there is a constant search for ways to use phosphogypsum. A new area of application for phosphogypsum is the synthesis of hydroxyapatite from phosphogypsum waste (Pewkeaw et al., 2018). Technically pure hydroxyapatite can be used in medicine. Currently a lot of studies are examining the adsorption properties of hydroxyapatite. Hydroxyapatite can be used in the production of wastewater treatment filters because of its high adsorption of fluorine, metals and paint residues. Other applications of phosphogypsum are analyzed, however this synthesis is similar, because by-product is utilized to produce material that can be used for waste water treatment. In this experiment, hydroxyapatite was synthesized by changing the synthesis conditions, and 8 samples were synthesized to select the optimal synthesis conditions. After synthesis the physical properties (moisture content, pH of the samples after synthesis) and chemical composition of the samples were evaluated. The most important indicator of the quality of hydroxyapatite is the ratio of calcium to phosphorus. This ratio should be the same as in human bone – 1,677 (7). The highest Ca/P ratio (1.68) was found for the sample obtained during the synthesis for 4 h without stirring at a pressure of 0.1 bar in a closed system. The content of heavy metals in the samples synthesized during the test does not exceed the norm of the hydroxyapatite quality standard. |
| Published |
Vilnius : Technika, 2020 |
| Type |
Conference paper |
| Language |
Lithuanian |
| Publication date |
2020 |
| CC license |
|
