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Removal of Zn+2 ions from aqueous solutions Using natural Syrian zeolite

إزالة أيونات الزنك من المحاليل المائية باستخدام الزيوليت الطبيعي السوري

1900   0   70   0 ( 0 )
 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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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.


Artificial intelligence review:
Research summary
تناول البحث دراسة إمكانية استخدام الزيوليت الطبيعي السوري في إزالة أيونات الزنك من المحاليل المائية. استخدمت عينتان من الزيوليت: زيوليت خام طبيعي (Z) وزيوليت معدل بكلوريد الصوديوم (Z-Na). تم تحديد نسبة إزالة أيونات الزنك بتابعية الزمن عند تراكيز ابتدائية مختلفة لأيونات الزنك في المحلول المائي (50, 100, 200, 300, 400 mg/L)، وبلغ زمن التوازن حوالي 360 دقيقة. كما تم دراسة تأثير درجة الحرارة ودرجة الحموضة (pH) على عملية الإزالة، حيث تبين أن العملية ماصة للحرارة وتزداد نسبة الإزالة بزيادة درجة الحرارة ودرجة الحموضة حتى قيمة pH = 7، ثم تزداد بشكل حاد نتيجة ترسب هيدروكسيد الزنك. تم استخدام علاقة لانغموير لتحليل البيانات التجريبية، وتبين أن السعة التبادلية العظمى للعينة Z بلغت 21.7 mg/g، بينما بلغت للعينة Z-Na 28.5 mg/g. أظهرت النتائج أن الزيوليت المعدل Z-Na يمتلك كفاءة عالية في إزالة أيونات الزنك من المحاليل المائية، مما يشير إلى إمكانية استخدامه في عمليات التبادل الأيوني لهذه الأيونات ولأيونات العناصر الثقيلة الأخرى.
Critical review
دراسة نقدية: يعتبر البحث قيمة علمية كبيرة في مجال معالجة المياه وإزالة الملوثات، حيث يقدم حلاً فعالاً ومنخفض التكلفة باستخدام مواد طبيعية متوفرة محلياً. ومع ذلك، يمكن تحسين البحث من خلال توسيع نطاق الدراسة لتشمل أنواع أخرى من الملوثات والعناصر الثقيلة، وكذلك دراسة تأثير العوامل البيئية المختلفة على كفاءة الزيوليت في عمليات الإزالة. كما يمكن تعزيز البحث بإجراء تجارب ميدانية لتقييم فعالية الزيوليت في ظروف بيئية حقيقية. بالإضافة إلى ذلك، يمكن النظر في تحليل التكلفة والفائدة الاقتصادية لاستخدام الزيوليت المعدل مقارنة بطرق المعالجة الأخرى.
Questions related to the research
  1. ما هي العينات المستخدمة في البحث لإزالة أيونات الزنك؟

    استخدمت عينتان: زيوليت خام طبيعي (Z) وزيوليت معدل بكلوريد الصوديوم (Z-Na).

  2. ما هو زمن التوازن الذي تم تحديده لإزالة أيونات الزنك؟

    بلغ زمن التوازن حوالي 360 دقيقة.

  3. كيف تؤثر درجة الحرارة على عملية إزالة أيونات الزنك؟

    تزداد نسبة الإزالة بزيادة درجة الحرارة، مما يشير إلى أن العملية ماصة للحرارة.

  4. ما هي السعة التبادلية العظمى للعينة Z-Na وفقاً لعلاقة لانغموير؟

    بلغت السعة التبادلية العظمى للعينة Z-Na حوالي 28.5 mg/g.


References used
MINCEVA.M; MARKOVSKA.L and MESHKO.V. Removal of Zn+2,Cd+2and pb+2from binary aqueous solution by natural zeolite and granulated activated carbon. J.Chem.Energ. 2007,26,125-134
SEN.TK; SARZALI.MV. Removal of cadmium metal ion from its aqueous solution by aluminum oxide:a kinetic and equilibrium study. J.Chem. Eng. 2008,142, 256-262
TRGO.M; PERIC.J; VUKOJEVIC MEDVIDOVIC.N. Investigation of different kinetic models for zinc ions uptake by a natural zeolite tuff. J.of Inviron. Manag. 2006,79,298-304
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