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Nano Research & Applications
ISSN 2471-9838
Advanced Nano 2017
Page 68
September 11-12, 2017 Amsterdam, Netherlands
20
th
International Conference on
Advanced Nanotechnology
Preparation of hydroxyapatite from industrial
waste phosphogypsum by hydrothermal
method; its application in waste treatment
Hiba Bensalah
1, 2
, Maged F Bekheet
2
, Saad Alami Younssi
1
, Mohamed
Ouammou
1
and
Aleksander Gurlo
2
1
University Hassan II of Casablanca, Morocco
2
Universität Berlin, Germany
P
hosphogypsum (PG) is an industrial waste derived
from the production of phosphoric acid wherethe
phosphate ore is dissolved in sulfuric acid. About 5 tons
of phosphogypsum are produced for every ton of P2O5
manufactured. Worldwide PG production is huge, and
it is estimated that 200.000tons are produced annually
in phosphoric acid plants. In fact, 85% of the worldwide
production remains at present stored into piles near
the factory that occupy considerable land resources, or
completely discharged into water, which lead to serious
contamination. In consequence, valorizing and minimizing
the negative effects of this hazardous waste increasingly
grab the attention of researchers all around the world.
In the present work, the conversion of an industrial sub-
product phosphogypsum (PG) into hydroxyapatite (H-Ap)
was investigated. Hydrothermal synthesis was applied by
reacting PG with a salt at different times, temperatures,
while adjusting pH using sodium hydroxide solution NaOH
(1M). The obtained H-Ap exhibited a hexagonal structure,
a high purity and nanorod- like shaped of 44nm x 12nm..
The prepared nano-hydroxyapatite was characterized
by X-ray diffraction (XRD), Fourier transformed-infrared
spectroscopy (FT-IR), transmission electron microscopy
(TEM) and scanning electron microscopy (SEM). The
findings showed that PG recycling could be accomplished
using an easy synthesis route with relatively cheap
reactants in order to produce nano-crytalline H-Ap.
The elaborated hydroxyapatite powder was used as en
effective adsorbent of organic dyes/heavy metals from
wastewater.
hiba.bens@hotmail.frNano Research & Applications