الفهرس 
Water resources in EgyptOnly 14 pages are availabe for public view
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Abstract
Nanomaterials have gained significant interest in the past
decade because of their unique physio-chemical properties unlike
their bulk materials. This gives nanomaterials the potential to be
used in a wide range of applications. Chemical and physical
methods have gained success in synthesizing nanoparticles with
excellent shape and size control. The present work investigate,
two newfangled paradigms were set up for produced water
treatment. Firstly; decoration of multi-walled carbon nanotubes
with magnetite (MMWCNTs), were prepared then modified with
silicon oxide nanomaterial (MMWCNTs/SiO2) and bismuth oxide
nanomaterial (MMWCNTs/Bi2O3). Secondly; low cost
amphiphilic activated carbon (AC), prepared from saw-dust waste
products via green and fast microwave synthetic methodology. It
is ornamented with magnetite (MAC) then modified with silica
nanomaterial (MAC/SiO2) and bismuth nanomaterial (MAC/
Bi2O3), these fabricated nanocomposites materials were fully
characterized using high-resolution transmission electron
microscope (HRTEM), field emission scanning electron
microscope (FESEM), dynamic light scattering (DLS), zeta
potential measurement, energy dispersive X-ray (EDX), thermal
gravimetric analysis (TGA), Fourier transform infrared
photometer (FTIR), and X-Ray diffraction techniques (XRD). A
bench scale column experimental was installed for the recovery of different series of miscible and non-miscible oil-model
components from synthetic oil in water mixtures by the prepared
nanomaterials. Afterwards, an optimal design of experiment
(ODOE) was designed at 95% confidence using response surface
methodology (RSM) to investigate the individual and interaction
effects of oil-separation parameters e.g. amount of
nanocomposites, initial oil concentration, pH and water salinity.
Moreover, the simulation of oil-recovery efficiency by
nanocomposites were optimized and modulated under four
operational parameters assisted by ANOVA analysis. The
simulated oil-recovery model data were fitted with polynomial
equation with R2 value of ≈ 0.99 and low error analysis was
obtained between the experimental results and the predicted
values. More important, the experimental data showed high oil
recovery by MAC/SiO2 and MMWCNTs/SiO2 with oil-separation
rate achieved at 99.4%, 90.33% but the other nanocomposites
materials (MMWCNTs, MMWCNTs/Bi2O3, MAC, and
MAC/Bi2O3) have separation rate with 75.96%, 78.96, 93.9%,
90.6%, respectively at optimum conditions even after 5 cycles,
furthermore to evaluate the highest presentage from the prepared
nanocomposite materials (MMWCNTs/SiO2 and MAC/SiO2) for
oil-water separation, we tested four isolated sample from real
Egyptian petroleum field to provide useful information for the scale up of the prepared materials in the real industrial
application.
Keywords: magnetic carbon nanocomposite; saw-dust wastes;
silicon oxide nanoparticles; bismuth oxide nanoparticles; oilrecovery;
hydrocarbon separation; column studies; optimal design
of experiment (ODOE); response surface optimization.