الفهرس 
IntroductionOnly 14 pages are availabe for public view
Abstract
the presence of valuable coal resources as well as exploit-
abie quantites of building stones and industrial minerals
(such as Manganese, Copper ores) had been proved in addi-
. tion to the pre-existing Mn-mines.
Underground water in Sinai represents a major water
resource. Sinai is rich in underground water, but the
available water is, however, unsuitable for the develop-
ment of human life in this arid region. Sinai is consider-
ed as one of the important mining areas in Egypt. Recently,
However, mining of the major coal seams in Oun-Mosa
district is hindered by the presence of excessive amounts
of underground water. Underground water is present under
relatively high pressure in the overlying geological
form~tion. Drainage of this water to reduce the water
table level below that of the workings is necessary to
enable the exploitation of the proved coal reserves. For
a proposed rate of drainage of about 30 000 m3/ day against
a total head of about 500 m, the drainage process will be
very expensive as it necessitates an energy consumption of
about 60 000 kw / day.
It is thought that the expensive costs of the proposed
drainage’ proces1s can be . partially saved by evaluating the
pumped w+er to be economically uti.’ r.z ed for the mining
operations and other life activities in the locality
The tests carried in Ain-Shams UnLversity on the water
samples obtained from different wells in Oun-Mosa have
shown that there is a great need for the treatment of the
available brackish and saline water to render it suitable
for the different life purposes. This fact gives the impetus
for the present research work to find out a most suitable
technique for such treatment.
The aim of the present thesis is to examine the suit-
ability of a modified Reverse Osmosis Technique for de-
salination of Oun-Mosa saline water.
~or this purpose a special equipment was developed that
includes a semi-permeable membrane which has been artificial-
ly formed by precipitating Copper - ferrocyanide within the
pores of a specially ceramic tube. The developed apparatus
enables the study of the membrane performance as a function
of some important operating parameters such as the physical
properties of the ceramic tubes, working time, feed pressure,
and the salinity of feed water, and their effect on the
performance of the proposed desalination technique.
The performed experiments have revealed very satisfactory
results as they enable the selection of the values of the
main operating parameters to insure optimal performance.