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Register a new userAdsorption of Ni(II) ions from aqueous solutions using natural zeolite
امتزاز النيكل (II) من المحاليل المائية على الزيوليت الطبيعي
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استخدم في هذا البحث الخام الزيوليتي الطبيعي السوري من منطقة أم أذن كمادة مازة لأيونات النيكل (II) من المحاليل المائية. درست عملية إزالة أيونات النيكل (II) عند شروط مختلفة و تبين أن عملية الإزالة تزداد بازدياد التركيز الابتدائي لأيونات النيكل (II) و درجة الحرارة و قيمة PH الوسط . جميع التجارب أجريت عند زمن تماس يساوي 6 ساعات. تزداد قيمة الامتزاز من 16.36mg Ni/g من أجل التركيز الابتدائي 100mgNi/L لأيونات النيكل (II) إلى 71.33mgNi/g من أجل 1000mgNi/L =C0 . تبين أن النتائج التجريبية لعملية الامتزاز تتوافق مع منحني امتزاز لانغموير متساوي الدرجة. و بلغت السعة العظمى للامتزاز qmax=142.85mgNi/g. تتغير كمية الامتزاز عند الدرجة 298K من 16.36mgNi/g من أجل C0=100mgNi/l إلى 47.93mgNi/g من أجل C0=400mgNi/l , ثم تتغير هذه القيمة بشكل طفيف عند الدرجة 333K لتصبح 16.65mg Ni/g من أجل C0=100mgNi/g و 51mgNi/g من أجل C0=400mgNi/L . تزداد كمية امتزاز أيونات النيكل (II) بازدياد قيمة PH حتى حوالي القيمة 5 ثم تبقى ثابتة حتى حوالي القيمة 6 . و بعد هذه القيمة تحدث عملية ترسيب (Ni(II على شكل هيدروكسيد.
The Syrian natural zeolite from om'ozon area has been studied as adsorbent for Ni(II) ions from aqueous solution. The removal of Ni(II) ions under different conditions was studied adsorption of Ni(II) enhanced with an increase of initial concentration, temperature and PH .all experiments were carried out at contact time 6h. The amount of Ni(II) adsorption was increased from 16.36 mgNi/g for initial solution concentration of 100mg Ni/l to 71.33 mgNi/g (for C0=1000mgNi/L). The experimental data fitted well to Langmuir isotherm. The maximum capacity was qmax=142.85mgNi/g Adsorption amount at 298K varies from 16.36mgNi/g for initial solution concentration of 100mg Ni/l to 47.93mg Ni/g(for C0=400mgNi/L) and it increases at 333K to 16.65 mgNi/g and 51mgNi/g (for C0=100 and 400 mg Ni/L )respectively. The adsorption of Ni(II) ions was increased by increasing PH up to ~ 5 and then stabilized up to PH=6 and after that the precipitation process was accured.
References used
MOTSI, T. ; R0WSON. N.A; SIMMONS. M.J.H. Kinetic studies of the removal of heavy metals from acid mine drainage by natural zeolite. Int. J. Miner. Process,101,2011,42-49
QIU. W; ZHENG, Y. Removal of lead, copper, nickel, cobalt, and zinc from water by a cancrinite-type zeolite synthesized from fly ash. Chem. Eng. J.145,2009,483-488
SHI, W.Y;SHAO, H.B;LI. H ;SHAO, M.A;DU, Sh. Review progress in the remediation of hazardous heavy metal-polluted soils by natural zeolite. J. Hazard. Mater170,2009,1-6
ARGUN, M.E.Use of clinoptilolite for the removal of nickel ions from water kinetics and thermodynamics. J. Hazard. Mater. 150 ,2008, 587–595
SHINDE,Nikhil R; BANKAR, Ashok V; KUMAR,Ameeta R ; ZINJARDE,Smita S. Removal ofNi (II) ions from aqueous solutions by biosorption onto two strains of Yarrowia lipolytica. Journal of Environmental Management 102,2012,115-124
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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.
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
of phenol was 60mg/l.
Adsorption amount of phenol increased when the adsorbent dosage increased up to
0.3g of zeolite.
The resulted data of the adsorption isotherm were fitted with Langmuire model and
the monomolecular layer adsorption formed on the surdace of the adsorbent.
In this work the use of natural magnetite in coast sand of Wadi-kandil area in Syria
in removal of Methylene Blue (MB) from aqueous solution was studied.
The XRD measurements showed that the sample contents the crystalline magnetite
and another co
mpounds. The magnetite in the simple was separated using magnetic
method and the percentage of magnetite in the sample about 70 %.
After separating the magnetite was used to removal the MB from aqueous solution at
different initial concentration of MB (5 , 10 , 20 , 40 , 60 mg/l ) and using different dosage
of magnetite (0.2 , 0.5 , 1 g) at different values of pH and temperature 25° C.
The adsorption of MB increasing by increasing initial concentration of MB and decreasing
by increasing of pH value and the removal of MB was clearly increased when the dosage
of magnetite was increased , the removal values were 47.8% , 84.9% , 88.7% for magnetite
dosage (0.2 , 0.5 , 1 g) respectively at concentration 5 mg/l of MB . While the adsorbed
amount of MB per mass unit of magnetite was decreased because the adsorption sites
weren't saturated.
The Treatment of adsorption data according Lngmuere and Frenglish models showed
that the adsorption process accrued on the energetic homogeneous and heterogeneous sites.
studied the elimination of lead using natural zeolite by studding the the best
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.
The study was carried out to remove of heavy metals (V+5, Ni+2)
under static conditions from aqueous solutions by Syrian Zeolite
mineral extracted from south of Syria. The results revealed that
operational conditions such as initial solution pH and concentration,
adsorbent particle size, the presence of competing cations, are able
to affect the adsorption capacity and efficiency of natural zeolite.
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