تحتوي مياه الشرب في بعض المناطق في القطر العربي السوري على تراكيز عاليـة مـن شـاردة
الفلوريد، و يعود ذلك لأسباب طبيعية لذلك درسنا بعض الطرائق لخفض تركيز الفلوريد فيها، مثل: طريقة
نالكوندا و طريقة الفحم الفعال.
وجدنا في طريقة نالكوندا، التي تعتمد إضافة إلى الماء, أن فاعلية نزع الفلوريد لا تتغير بتغير التركيز الأولي له، أو عند وجود شوارد الكلوريد في المـاء، و لكنّهـا تعتمد على pH الوسط و تصبح أكبر عند تجزئة عملية نزع الفلوريد إلى مرحلتين. بالإضافة إلى ذلك يقل امتزاز الفلوريد بازدياد زمن التركيـد أو باسـتعمال المهـوى.
كما أجرينا تجارب مختلفة في طريقة الفحم الفعال باستعمال فحوم نباتية مختلفة محضرة من: قـشر
جوز الهند و بذر التمر و بذر الزيتون، و وجدنا أن فحم بذر الزيتون هو الأفضل، و تزداد فاعليته في نـزع
الفلوريد بعد تشريبه بمحلول %2 كبريتات الألمنيوم.
Fluoride ion is present in high concentration in some regions in Syria. As
fluoride occurs naturally in water, We have studied some methods of fluoride
removal such as Nalgonda technique and activated carbon method.
In Nalgonda technique we add Alum and lime to the water, and we have
found that fluoride removal efficiency remains constant when the initial
concentrations of fluoride changes, or when the chloride ions exists in water,
but it depends on pH, and get better when the method is investigated in two
steps. In addition, adsorption of fluoride decreases with increasing
sedimentation time, or using Ventilated lime or CaCO3 instead of Ca (OH)2.
In activated carbon method we have done different experiments by using
charcoal of coconut coir, date seeds and olive seeds. And we have found that
olive seeds carbon is better than others, and its fluoride removal efficiency
increases after impregnation with solution of 2% Al2(SO4)3.
References used
Adachi, A. AK.; Amatsu, N. 1991. "Fluoride in tap and underground water sampler from Kini area in Japan, Bulletin of Environmental Contamination and Toxicology". (46), pp 677-80
Arnold, E; Lenore, S. 1992. "Standard methods for the examination of water and waste water, American Public Health Association, 18th edition", (4), p. 59
Azbar, N.; Türkman, A. 2000. ''Defluoridation in Deinking Waters''. (42), Water. Science and Technology, pp. 403-407
Water sources in Syrian coastal area have a great importance due to the variety of the
sources and the urgent needs to water for drinking and irrigation. Therefore great efforts
are made to protect water sources from contaminants. This research aim
Drinking water is too neccessary for everyone .It must be pure
and healthy.Turbidity is one of the most important problems in
water .It may cause damage for humanbeings . So it must be
controlled. This search aims to determine the suitability of
Proven chemical analyzes conducted in the summer of 2014 to thirty wells in the
village AL-Shamia- Latakia region, that water wells west of the adjacent village to the
seaside up to 300 m distance to the east where the salinity increases while decreasing the
East Village to become water sweet near way of Lattakia-Kassab, at a distance of 1500 m
fromn the sea beach.
This research discusses the problem of drinking water shortage and
distribution instability in Salamyeh city due to the current crisis.
Salamyeh city dependents on Orontes River as a source for drinking
water through Hama water supply facility, wh
In this research, we present, a linear programming using model.
This model can define the optimal proposal ( with minimum cost
and high efficiency ) in both cases : new net design or exist net
modification.