Abstract
Hierarchically porous hydroxyapatite derived from cork powder shows excellent performance in biomedicine (low cytotoxicity) and environmental remediation (high Pb2+ removal).
Highlights
Calcium phosphates (CaP) are a very important class of materials due to their many interesting properties and technological applications, in the biomedical field.[1]
The powder was subsequently treated at 700 1C in an inert atmosphere (N2), the thermal treatment leading to the conversion of the acetate into carbonate, some residual graphitic carbon was detected
In some preliminary experiments different reaction times were considered, to monitor the conversion of CaCO3 into HA; these first tests were all performed with pH adjusted to 9, to avoid the formation of different CaP phases.[29]
Summary
Calcium phosphates (CaP) are a very important class of materials due to their many interesting properties and technological applications, in the biomedical field.[1]. Stoichiometric HA has a Ca/P ratio of 1.67, while bone mineral typically has a slightly smaller ratio and contains some carbonate ions;[3] because of this, calcium-deficient hydroxyapatite (CDHA) has been considered for biomedical applications, along with mixtures of 75% HA and 25% b-tricalcium phosphate (b-TCP, Ca3(PO4)[2], Ca : P ratio = 1.5). The use of these in place of stoichiometric HA has led to improved bioactivity and resorbability of bone scaffolds.[4]
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