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Register a new userStudy of the separation of some radioactive elements from the residues of the Syrian phosphorous acid industry (Phosphogypsum)
دراسة فصل بعض العناصر المشعة من مخلفات صناعة حمض الفوسفور السوري ( الفوسفوجبسوم )
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Aِl-Baath University رسالة ماجستير
Publication date
2016
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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تم في هذا البحث اجراء نوعين من الدراسات : النوع الأول وهو عبارة عن دراسة كوانتية لبعض مركبات اليورنيوم أما النوع التاني فهو دراسة تجريبية لفصل بعض النظائر المشعة .
In this research, two types of studies were conducted: the first type is a quantum study of some uranium compounds, and the second type is an experimental study to separate some radioactive isotopes.
References used
دليل الخامات المعدنية واللامعدنية , المؤسسة العامة للجيولوجيا والثروة
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Phosphoric acid is one of the most important products in
chemical industry, where it is used in different industries,
such as food and fertilizer industries and so on .
This study focuses on the preparation of phosphoric acid
from Syrian phosphate in the laboratory by using the
hemihydrate method , and determines the best optimal
conditions for preparing this acid using this method .
This paper deals with a geochemical study of radioactive elements (uranium, thorium, and potassium) in rocks of different composition within the Latakia sheet, where the concentration of radioactive isotopes 238U, 232 Th, 40K was determined using a
high-purity germanium detector, and an X-ray diffraction method-was (XRD) used to determine the mineral phases. The study showed a variation in the concentration of 238U, 232 Th, and 40K in the rocks of the study area, and it was observed that the radioactivity is mainly related to the element thorium, due to the presence of metals carrying thorium. The low concentration of potassium in most samples is due to the low percentage of mica and feldspar metals, or their corruption to elite and montmorillonite. The ratio Th/U indicated a suitable reference environment for deposition of uranium in most sedimentary samples, and this high percentage in the ophiolitic complex samples (with the exception of serpentinite rocks) is due to the oxidation and migration of uranium from these rocks towards rocks of sedimentary formations, and the stability of thorium and is not affected by oxidative conditions. The ratio Th/K indicated the predominance of elite and montmorillonite in most samples, with the presence of weather-resistant thorium-bearing metals in the basalt sample, and the sediments of Lake 16 October. The mineralogical study revealed the existence of mineral phases of uranium and thorium, in addition minerals carrying radioactive elements such as monazite and zircon
This study was conducted in the Syrian coastal region, and the honey samples have
been collected from eight different sites belonging to the provinces of Latakia and Tartous
during the autumn of 2012. Their content of heavy metals (zinc, copper, le
ad & cadmium)
was estimated by Atomic Absorption at the Higher Institute for Environmental Research at
Tishreen University. The results showed that zinc concentration in the bee honey samples
ranged from 2.86 to 12.64 mg / kg (mean 7.98±3.67), and copper ranged from 0.125 to
0.652 mg / kg (mean 0.328±0.176 ), lead ranged from 0.084 to 0.378 mg / kg (mean
0.205±0.112), cadmium ranged from 0.0002 to 0.0132 mg / kg (mean 0.0053±0.0052). The
results indicated that the largest amounts of heavy metals were found in honey sample
taken from the apiary which is located at the eastern entrance of Latakia city (near Joud
factory), while the lower concentrations of zinc and lead were in Banias area (Wadi Al
Saqi), and the least concentration of copper was in Safita area, and of cadmium was in the
Gablah area (Bani Qahtan Castle).Comparing elements concentration in the studied honey
samples, Zinc concentration was found to be the highest, followed by copper, lead and then
finally cadmium.The results of statistical analysis indicated the existence of significant
differences between the studied sites during the autumn of 2012.
This research was conducted at the Faculty of Agriculture, Department of
Food Science laboratories to isolate lactic acid bacteria from some Syrian milk
products (milk, yogurt, cheese) and determine some morphological,
physiological characteristic and the ability of these isolates to ferment sugars.
The samples of various food products have been collected at several times per season
over two years, in order to determine the content of phytic acid to investigate the influence
of the adopted treatment methods on phytic acid degradation and to mi
nimize their
unhealthy effects.
It's been shown that PA is found at high levels in the mentioned products especially,
in unripe fruits where its levels ranged between (0.15-3.57%g.s.d) while PA levels were
less in the process products and ranged between (0-1.95 %g.s.d).
Technological processes were applied to biodegrade phytic acid of some foods and
the reduction ratio ranged between 20-60% of the whole content of PA.
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