Synthesis and properties of alumina-hydroxyapatite composites from natural phosphate for phenol removal from water

Abstract

Phenol is very abundant in the aquatic environment and therefore requires an effective treatment using porous and low-cost adsorbents. Alumina-hydroxyapatite composites were prepared from natural phosphate ore in the presence of Al 3+ ions via a wet-chemical method. Porous composites were characterized and the Al-surface modification was produced by facile and inexpensive route to uptake adjacent toxic species. Supplementary active sites on their surface may improve their phenol remediation. Nanocomposites exhibit higher phenol sorption rates than pure hydroxyapatite. It is concluded that the specific surface area, surface charge and Al content are suitable for phenol removal from aqueous solution using Alumina-hydroxyapatite composites. The results show that the retention power of these composites depends on a complex interaction between intermolecular and molecule-solid interactions. These findings are relevant to better understand the contribution of alumina content in Alumina-hydroxyapatite composites to the fate and uptake of phenol from aquatic environments.

Obtenção de hidroxiapatita por reação de combustão da solução para aplicações biomédicas

“…Dentre a categoria dos CaP, os principais representantes da classe são a hidroxiapatita, (Ca 10 (PO 4 ) 6 (OH) 2 -HAp) de razão Ca/P=1.67 e o fosfato tricálcico ((-Ca 3 (PO 4 ) 2 --TCP) de razão Ca/P=1.5, os quais são amplamente empregados por exibirem biocompatibilidade, bioatividade, semelhança química com a fase mineralógica de ossos e dentes, não interferem nos processos de reparação, não são instantaneamente reabsorvíveis, exibirem estabilidade dimensional, facilidade de preparo e inserção (Bouiahya et al, 2019;Ibrahim et al, 2020).…”

Novas tecnologias aplicadas à engenharia biomédica: Uma Contribuição à Engenharia de Tecidos

“…Em cada situação, os biomateriais devem atender as necessidades específicas de biocompatibilidade, uma vez que devem apresentar propriedades físicas e biológicas compatíveis com os tecidos vivos hospedeiros, de modo a estimular uma resposta adequada. Dentre esses biomateriais, as cerâmicas a base de fosfato de cálcio são materiais promissores (Bouiahya et al, 2019;Ibrahim et al, 2020).…”

Apatite ore-based nanostructures: novel and eco-friendly sorbent for efficient removal of wastewater containing Pb2+ and Fe3+

“…In recent years, heavy metal ions removal from wastewater has been achieved using different types of nanomaterials such as graphene flakes (Kong et al 2021), activated carbon (Nga et al 2021), carbon nanotubes (Vesali-Nased et al 2021), clays (Huang et al 2020;Yadav et al 2019), zeolites (Joseph et al 2020), bio-adsorbents (Chen et al 2021), silica , hydroxyapatite (HAp), and apatites (Duyen et al 2018;Phuong et al 2020;Nam et al 2021), where the apatite-based nanostructures are non-toxic and environmentally friendly sorbents. This material is well known for the water remediation from pollutants, including pharmaceutical-based compounds (Harja and Ciobanu 2018;Cleibson et al 2021), organic aromatic pollutants (Bouiahya et al 2019;, and heavy metal ions (Duyen et al 2018;Phuong et al 2020;Nam et al 2021). Moreover, this material exhibits very high stability in extreme thermal conditions and therefore can be applied in various industrial fields (Ramachandra et al 1997).…”