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Register a new user"Removal of Cu and pb ions from aqeous solutions by flotation method"
"إزالة أيونات النحاس و الرصاص من المحاليل المائية بطريقة التعويم"
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Tishreen University ورقة بحثية
Publication date
2018
fields
Environmental Engineering
and research's language is
العربية
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Shamra Editor
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دُرس في هذا البحث إزالة أيونات النحاس و الرصاص من المحاليل المائية بطريقة التعويم و تأثير العوامل المختلفة على عملية الإزالة . بينت الدراسة إزدياد نسبة إزالة أيونات النحاس و الرصاص بإزدياد قيمة pH المحلول حتى القيمة pH = 8 و بلغت نسبة الإزالة حوالي 80 % ، أما عند قيمة pH = 10 تحصل عملية ترسيب للأيونات على شكل هيدروكسيدات. تزداد نسبة الإزالة لكلا النوعين من هذه الأيونات بإزدياد تدفق الهواء داخل المحلول لتصل الى 98 % للنحاس و97 % للرصاص عند تدفقQ=1000 ml/min ثم بعد ذلك تتناقص نسبة الإزالة لتصل الى 60 % بإزدياد تدفق الهواء الىQ=1500 ml/min . تؤثر قيم التركيز الإبتدائي على عملية الإزالة و تبين إزدياد نسبة الإزالة بإزدياد التركيز الإبتدائي حيث بلغت نسبة إزالة أيونات النحاس 58 % عند التركيز الإبتدائي C0 = 50 mg/l لتصل الى 98 % عند التركيز C0 =100mg/l بينما بلغت نسبة إزالة الرصاص 61 % عند التركيز C0 = 50 mg/l لتصل الى 97 % عند التركيز C0 =100 mg/l
In this search, the removal of copper and lead ions from aqeous solutions by flotation had been studied, and the effect of various factors on the removal process. The study showed that the removal of copper and lead ions was increased by increasing the value of the solution pH up to pH = 8 and the removal rate was 80%. At pH = 10 precipitation of the ions was obtained in the form of hydroxides. The removal ratio of both ions is increased by increasing the flow of the air within the solution to reach 98% for copper and 97% for lead at the flow of Q = 1000 ml/min and then the removal rate decreases to 60% with increasing airflow to Q = 1500 ml/min. The initial concentration values affect the removal process and the increase in the removal ratio was shown by increasing the initial concentration. The removal rate of copper ions was 50 % at the initial concentration of C0 = 50 mg / l to 98% at C0 = 100 mg / l. While the lead removal rate was 61 % at the initial Concentration C0 = 50 mg/l to 97% at concentration C0 = 100 mg / l.
References used
GHAZY, S.E., EL-SHAZLY, R.M., EL-SHAHAWI, M.S., AL-HAZMI, G.A.A. AND EL-ASMY, A. A., Spectrophotometric determination of copper (II) in naturalwaters, vitamins and certified steel scrap samples using acetophenonepchlorophenylthiosemicarbazide,J. Iranian Chem. Soc., 3, (2006) 140-150
GHAZY, S. E; EL-MORAY, S. M; AND RAGAB, A. H; Ion flotation of copper (II) and lead (II) from environmental water samples, J. Appl. Sci. Environ. Manage. 12, (2008),75 – 82
THACKSTON, E.L., WILSON, D.J., AND MILLER, D.L; Lead removal with adsorbing colloid flotation, J. Water Pollut. Control Fed., 52, (1980)317- 328
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In this work the process of removal of zinc ions from aqueous solutions was studied using natural Syrian zeolite. Two samples were used: natural zeolite Z and modified zeolite with NaCl solution Z-Na. The removal percentage of zinc ions vs. time was
determined using differential initial concentrations of Zn+2: 50,100,200,300,400 mg/L. The contact time was determined and it was 360 min. The removal of Zn+2 ions as a function of temperature and pH have been studied. It was found the increasing of removal percentage by increasing temperature and increasing when pH increasing up to ~7,then the precipitation of zinc hydroxide accurse. The Langmuire adsorption isotherm equation used to calculate the maximum sorption capacity and it was 21.7 and 28.5 mg/g for Z and Z-Na respectively. Results indicate a significant potential for the natural and modified zeolite as an adsorbent/ion-exchange materials for heavy metal removal.
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conditions to removal lead in a system with two phase: liquid (contaminated water with
lead)-solid (natural zeolite), correlation of the following factors: time of mixin
g phase,
granular size of solid phase, change of pH values, concentration of the calcium element as
a competitor element for the available sites for occupation on the solid phase, the ratio V/m
represents the size of the aqueous phase to the mass of the solid phase and concentration of
lead element.
On the other hand, the possibility of using natural zeolite as a template for storaging
dangerous materials such as lead, has been studied by changing water quality, pH and
temperature.
The results of this research show that and under the following experimental
conditions: time of mixing=4hour, mix of granular size of solid phase, pH< 8,
concentration of calcium = 20 ppm,V/m=100 and concentration of lead = 1000 ppm , the
rate of lead removal range from 60% to 99%.
On the other hand, the results of this research show that changing water quality has
no impact on the ability of natural zeolite for storaging lead as a hazardous waste, while
pH changes have minor effects on this ability of retention and an effect for the high
temperatures on the template was also observed.
Syrian natural zeolit was used to study the adsorption of phenol from aqueous
solutions. Batch method was used to study the adsorption process.
The results showed that the adsorption process accurs rabidly at the first time and the
equilibrium ach
ieved after 120min .
The adsorption process performed in the rang of PH (3-10). The adsorption of phenol
increased by increasing of PH value up to(6-7) and then decreased.
The temperature affect the adsorption process and the results showed that the
increasing of the temperature leads to decreasing of the adsorption of phenol.The
maximum adsorption amount of phenol was 8 mg/g at 25C0 when the initial concentration
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Adsorption amount of phenol increased when the adsorbent dosage increased up to
0.3g of zeolite.
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effects, is one of the most serious environmental problems. Many heavy metal
ions, such as mercuric ions are detected in industrial wastewaters originating
from metal plating,
mining activities, paint manufacture, etc. This ion isn’t
biodegradable and tends to accumulate in living organisms, causing various
diseases and disorders. Therefore, it should be removed from aqueous solution
before discharge.
This search aims to study the adsorption of Cu ions from their solutions
on the surface of silicon oxide.
These experiments were in five groups, at the first three groups the
amount of the adsorbent was constant, and the concentration of the
adso
rbing ions was changed, after the adsorption is ended the
concentration of Cu remaining ions in the solution was measured, then
the quantities of the adsorbing ions on the surface of silicon oxide were
determined.
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