Post on 08-Sep-2021
Calcium phosphate precipitation for removal of textile dyes
from industrial wastewaters
W. Lemlikchi, N. Oubagha, P. Sharrock, M. Fiallo, M.O. Mecherri
Castres
Tizi-OuzouUniversité Mouloud Mammeri
Tizi-Ouzou 15000 AlgérieUniversité Paul Sabatier Toulouse 3,
Castres 81104 France
[Ca10(PO4)6(OH)2] = HA
Adsorption of dyes on hydroxyapatite
Sorbant materialused for heavy metals remediation
Solid stateGelCo-precipitation (nucleation)
Alizarin red S
Adsorption: 1.4 g of dye in 1 g HA
Nucleation of hydroxyapatite = 99 %
Remediation of textile dyes by HA
Blue Hydron (Vat Blue 43) 1909
Interaction between Blue Hydron and HA
adsorption co-precipitation
Loss of water
Loss of organic matter
Combustion ofgraphitic carbon
Thermogravimetric analysis of the precipitate
adsorption
Co-precipitation
Co-precipitation
adsorption
Time 75 min; pH 7.3
Co-precipitation
adsorption
Co-precipitation
adsorption
Time 75 min Time 15 min
H3PO4
CASTRES
Pays de cocagne