الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
This study was conducted on the Nozha WTP, Alexandria Water Company and the plant receive raw water from Manshia WTP through the pipe, sourced from private Canal from Mahmoudia Canal before entering the city. The study aimed to using different coagulant to remove heavy metals from treated water and the ICP was used in the study for heavy metals analysis. It has been conducting studies and experiences of the process to remove heavy metals from the treated water by using different coagulants (alum - ferric chloride - poly aluminum chloride) in addition to the natural sorbents of heavy metals (bentonite -zeolite). This study began analyzing raw water in Nozha plant to determine heavy metal percent. In addition, determine the optimum dose for each of the above coagulants after the addition of different doses and measuring the corresponding turbidity per dose after conducting experience (Jar test). The water samples were collected from the Nozha WTP to purify drinking water twice a week for six months to get the 48 samples in the period from January 2012 until June 2012 and the appointment of metals mentioned ratio after adding the optimum dose of the alum (25 mg/l) and poly-aluminum chloride (8mg/l) and also use a mixture of both of these coagulant optimum dose and adding bentonite and zeolite (10mg/l) and determine the average heavy metals removal percent for each dose separately. Water samples (DW) were prepared which contain fixed concentrations (0.5mg/l) of metals (aluminum, barium, iron, manganese and zinc). Different doses of coagulants, as well as natural adsorbent materials were used with the spiked water samples and then analyzed the heavy metals residue by ICP device to determine the ratio of heavy metals removal. Heavy metals analysis in raw water The results obtained from analysis of Nozha WTP intake showed that the majority of heavy metals (silver, boron, beryllium, cadmium, cobalt, chromium, copper, nickel, molybdenum, lead, vanadium) were not detected (ND). Aluminum values ranged between 0.184 and 0.662 mg/l and barium concentration ranged from 0.029 to 0.0625mg/l.Also, iron ranged from 0.7 to 0.083mg/l, manganese was between 0.021 and 0.112mg/l and zinc was ranged between 0.006 to 0.155mg/l. A well operating clarifier should be able to produce an effluent of turbidity equal 2.5 NTU or less so the optimum dose for each coagulant detected as follow: The optimum dose for alum was 25mg/l at turbidity 2.1NTU. Ferric chloride optimum dose was 20mg/l at turbidity 2.8NTU. In addition, the optimum dose for poly-aluminum chloride was 8mg/l gave average turbidity 2.9NTU.
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English Summary
Removal percent of heavy metals using two coagulants and adsorption techniques When using a mixture of alum 25mg/l and zeolite 10mg/l found that the removal percent of Al ranged from 86.7% to 98.2%, Ba was ranged from 86% to 100%, Fe removal percent ranged from 82.1% to 98.8%, Mn ranged from 88% to 97.6% and Zn from 92.3% to 100%. While when using a mixture of alum 25mg/l and bentonite 10mg/l Al removal percents were from 81.1% to 98.8%, Fe removal from 80% to 97%,Ba ranged from 80.6% to 100%, Mn was from 79% to 96.6% and Zn was from 80% to 95%. Al removal percents were from 94.9% to 100% when using a mixture of PAC 8mg/l and zeolite 10mg/l, Mn was removed from 97.1% to 100%, Fe ranged from 87.3% to 100%, Ba decreased from 83.3% to 100%, and Zn was from 92% to 100%. Using a mixture of PAC 25mg/l and bentonite 10mg/l detected that Al removal percents ranged from 79.5% to 99.1%, Ba ranged from 83.3% to 100%, Fe removal from 87.3% to 98.1%, Mn was from 75.9% to 97.6% and Zn was from 80% to 97.1%. Removal of heavy metals using coagulant techniques (synthetic water) By adding different doses of alum from 15 to 40 mg/l on spiked distilled water respectively found that Al concentrations increased from 0.5811l to 0.6842mg/l, while Ba showed decreased from 0.4984 to 0.4852mg/l at the same doses. Also, Fe decreased from 0.4692 to 0.3445 mg/l, Mn decreased from 0.4912 to 0.4113 mg/l and Zn also decreased from 0.4814 to 0.3894 mg/l. The increasing of ferric chloride doses 5-30mg/l respectively showed that Increased of Fe from 0.5122 to 0.8541 mg/l, while Al concentrations decreased from 0.453l to 0.3544 mg/l. Ba decreased from 0.4903-0.4729 mg/l at the same doses. Mn decreased from 0.4902 to 0.4682 mg/l and Zn also decreased from 0.4855 to 0.4401 mg/l at the same doses. When using poly-aluminum chloride doses 1-12mg/l respectively, found that Al concentrations increased from 0.5442 to 0.5821 mg/l. While the level of Ba decreased from 0.4752-0.4384 mg/l. Fe decreased from 0.4258 to 0.3546 mg/l at the same doses also Mn decreased from 0.4524 to 0.3622 mg/l and Zn also decreased from 0.4541 to 0.4316 mg/l at the same doses. Removal of heavy metals using adsorption techniques (synthetic water) The results found that at 80 mg/l of zeolite adsorbent dose, the removal percents of all heavy metals were 100% except Al and Mn where both of them had removal percents of 99.8%.
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English Summary
In addition, the results showed that, at dose 80 mg/l bentonite, the removal percents of all metals were 100% except Al and Zn where they had removal percents of 99.8%
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