TY - JOUR
T1 - Raw and treated marble wastes reuse as low cost materials for phosphorus removal from aqueous solutions
T2 - Efficiencies and mechanisms
AU - Haddad, Khouloud
AU - Jellali, Salah
AU - Jaouadi, Safa
AU - Benltifa, Mahmoud
AU - Mlayah, Ammar
AU - Hamzaoui, Ahmed Hichem
N1 - Publisher Copyright:
© 2014 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
PY - 2015/1
Y1 - 2015/1
N2 - Phosphorus removal from synthetic solutions by raw and calcined powdered marble wastes (RPMW and CPMW) has been investigated in batch mode under different experimental conditions. The results showed that RPMW and CPMW have high removal efficiencies, especially in acidic media. The maximum phosphorus removal capacities were evaluated to 103.9 and 181.2 mg g 1 at an initial pH and an aqueous concentration of 5 and 350 mg L-1, respectively. Phosphorus removal by RPMW occurred mainly through adsorption. However, for CPMW, phosphorus was removed not only by adsorption, but also by precipitation as calcium phosphate complexes. Specific analyses using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy confirmed that this precipitate is most probably hydroxyapatite. On the other hand, CPMW have demonstrated an important ability in removing phosphorus from highly concentrated dairy wastewater (C0,P = 1000 mgL-1) since only one dosage of 10 gL-1 was enough to ensure more than 97% of phosphorus removal.
AB - Phosphorus removal from synthetic solutions by raw and calcined powdered marble wastes (RPMW and CPMW) has been investigated in batch mode under different experimental conditions. The results showed that RPMW and CPMW have high removal efficiencies, especially in acidic media. The maximum phosphorus removal capacities were evaluated to 103.9 and 181.2 mg g 1 at an initial pH and an aqueous concentration of 5 and 350 mg L-1, respectively. Phosphorus removal by RPMW occurred mainly through adsorption. However, for CPMW, phosphorus was removed not only by adsorption, but also by precipitation as calcium phosphate complexes. Specific analyses using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy confirmed that this precipitate is most probably hydroxyapatite. On the other hand, CPMW have demonstrated an important ability in removing phosphorus from highly concentrated dairy wastewater (C0,P = 1000 mgL-1) since only one dosage of 10 gL-1 was enough to ensure more than 97% of phosphorus removal.
KW - Dairy effluents
KW - Marble wastes
KW - Phosphorus
KW - Removal
KW - Synthetic solutions
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U2 - 10.1016/j.crci.2014.07.006
DO - 10.1016/j.crci.2014.07.006
M3 - Article
AN - SCOPUS:84921341120
SN - 1631-0748
VL - 18
SP - 75
EP - 87
JO - Comptes Rendus Chimie
JF - Comptes Rendus Chimie
IS - 1
ER -