A new application of Hydroxyapatite extracted from dromedary bone: Adsorptive removal of Congo red from aqueous solution

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TitreA new application of Hydroxyapatite extracted from dromedary bone: Adsorptive removal of Congo red from aqueous solution
Type de publicationJournal Article
Year of Publication2021
AuteursGhedjemis A, Ayeche R, Benouadah A, Fenineche N
JournalINTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
Volume18
Pagination590-597
Date PublishedMAY
Type of ArticleArticle
ISSN1546-542X
Mots-clésadsorption, Congo red, dromedary bone, natural hydroxyapatite
Résumé

The aim of this paper is to evaluate the efficiency of the natural hydroxyapatite powder for anionic dye (Congo red) elimination from water and optimization of adsorption process parameters that are contact time (0-360 min), solution pH (4-9), initial dye concentration (400-2400 mg/l), and adsorbent dosage (0.4-20 g/l). Natural hydroxyapatite with high surface area was prepared from animal agriculture waste dromedary bone. X-ray diffraction, transmission electron microscopy, transform infrared spectroscopy, and elemental analysis characterizations of the powder prepared show a hexagonal structure, the irregular form of hydroxyapatite and presence of other elements as trace element. The results of adsorption tests demonstrated the high efficiency of natural hydroxyapatite for removal of Congo red from water solution whose maximum experimental capacity adsorption of Congo red by natural hydroxyapatite is 900 mg/g at pH 4.5, equilibrium time 240 min and adsorbent dosage 2 g/l. According to the correlation coefficient value, the pseudo-second order kinetic model identified the sorption mechanism of pollutant used on natural hydroxyapatite. The Freundlich isotherm is the best representative theoretical model of the dye molecules' adsorption on the natural hydroxyapatite support.

DOI10.1111/ijac.13677