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Effect of the granular size on the zeolite content in the natural zeolite ores

تأثير الحجم الحبيبي على محتوى الزيوليت في خامات الزيوليت الطبيعية

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 Publication date 2017
  fields Chemistry
and research's language is العربية
 Created by Shamra Editor




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Natural zeolite which named TS-14 from Tel- Asis area in Syria has beenstudied. The sample was crashed under fixed force, 5kg/cm2 and sieved with differentsizesieves. The product was divided to five samples with different size, andnamedTS-14-1,<0.125mm, TS-14-2, 0.125-0.3mm, TS-14-3, 0.3-0.6mm, TS-14-4, 0.6-85mm, TS-14-5, 0.85-1.4mm. The specific surface area was calculated. The maximum specific surface area was 84.6m2/g for the first sample which has minimum size, then the value of surface area decreases to become 54.2m2/g for the second sample, therefore the value of surface area increases for third and fourthsamples to became 60.3m2/g and 66.3m2/g, respectively. The adsorption of the Ni(II) ions was studied using the samples. The capacity of the samples is increasing when the granule size is increasing, and the maximum capacity was 91.7mg/g as Ni(II) ions for last sample. The adsorption process of Ni(II) ions takes place on the heterogeneous centers.

References used
BRECK. D.W., (1974),Zeolite Molecular Sieves,WillyInterscience Pub New York , London,771
LUBOMIRA .T., (1999),Zeolite Macrostructures,Licentiate,543
RAHEB. A, KAWASS. H.AL, 2005 Characterization of the Syrian Ores Containing Zeolite in Om'Ezen Area, Tishreen University Journal for studies and ScientificResearch – Basic Science Series Vol . (27)No(1)
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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 concentratio n, 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.
Zeolite bearing deposits were characterized in Banyas region using sample A (which is a powdered mixture taken from five tuff and tuffite levels) compared with sample B (which is taken from Basatin Al-Assad site within the studied region). XRD met hod showed several zeolite phases in addition to non-zeolite minerals and volcanic glass. FTIR method revealed a general feature of zeolite groups. DTA method showed a range within zeolite structure stability. Specific surface area was measured using BET method giving the value 87m2/g. The range of pore volume distribution was also calculated with ~40Ǻ, and intermediate pore diameter of ~23Ǻ. XRD study of the standard sample (B) showed slightly different zeolite phases from A. FTIR measurement showed same results as in A. DTA plots revealed a high stability of sample B, SBET of 61m2/g, VP around 40Ǻ and r- at ~25Ǻ.
The research was carried out at Al-Qamishli Agricultural Research Center, GSAR, Syira, during the seasons 2011, 2012 and 2013, in order to estimate the effect of adding different levels of a crude Zeolite (T2-20 tons/ha, T3- 40 tons/ha, in addition to the control (without adding Zeolite T1), on wheat productivity within a bilateral crop rotation was followed, consisted of wheat and chickpea, and on the content of nitrogen, phosphorus and potassium in the surface layer of the soil .The research was conducted using Complete Randomized Block Design with three replicates.
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.
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