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Lead, Zinc Removal from Industrial wastewater using Syrian Natural Zeolite /phillipsite/ from southern Syria

إزالة الرصاص و الزنك من المياه الصناعية باستخدام زيوليت طبيعي /فليبسايت/ من جنوبي سوريا

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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The study was carried out on the sorption of heavy metals (Pb+2, Zn+2) under static conditions from single- and multicomponent aqueous solutions by Syrian Zeolite mineral extracted from south Syria. The removal has an ion-exchange nature and consists of three stages: the adsorption on the surface of microcrystals, the inversion stage, and the moderate adsorption in the interior of the microcrystal, The study showed that equilibrium time is 6 hours, and The slight difference between adsorption capacity of the Zeolite toward lead, zinc from single- and multicomponent solutions may testify to individual sorption centers of the zeolite for each metal. The maximum sorption capacity toward pb2+ is determined as 33.89 mg/g at an equilibrium concentration of 261.07 mg/L and toward Zn+2 as 29.18 mg/g at 309.818 mg/L. Langmuir and Freundlich Adsorption Isotherms were used to evaluate natural zeolite adsorption performance for Lead, Zinc. These Isotherms were able to provide suitable fit with experimental data, the factor R2 ranged between 0.95 – 0.99, with better fit to Langmuir Isotherm.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة إزالة المعادن الثقيلة (الرصاص والزنك) من المياه الصناعية باستخدام الزيوليت الطبيعي المستخرج من جنوب سوريا. أظهرت النتائج أن عملية الإزالة تعتمد على التبادل الأيوني وتتكون من ثلاث مراحل: الامتزاز على سطح البلورات الميكروية، مرحلة التحول، والامتزاز المحدود داخل البلورات الميكروية. تم تحديد الزمن اللازم للوصول إلى التوازن بـ 6 ساعات. أظهرت الدراسة أن هناك مراكز امتصاص فردية للزيوليت لكل معدن، حيث كانت سعة الامتصاص القصوى للرصاص 33.89 ملغ/غ وللزنك 29.18 ملغ/غ. تم استخدام نماذج خطوط تبادل امتزاز لانغموير وفريندليتش لتقييم أداء الامتزاز، وأظهرت النتائج ملاءمة جيدة مع البيانات التجريبية، مع ملائمة أفضل لنموذج لانغموير. كما تم دراسة تأثير حجم الجزيء، ودرجة الحموضة، والشوارد التنافسية، وشوارد الكالسيوم على فعالية الامتزاز. أظهرت النتائج أن الزيوليت الطبيعي يمتلك كفاءة عالية في إزالة الشوارد المدروسة سواء بوجود أو عدم وجود القساوة، مما يعزز من قيمته الاقتصادية.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال معالجة المياه الصناعية وإزالة المعادن الثقيلة باستخدام مواد طبيعية وفعالة من حيث التكلفة. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. على سبيل المثال، لم تتناول الدراسة بشكل كافٍ تأثير العوامل البيئية الأخرى مثل درجة الحرارة والضغط على فعالية الامتزاز. كما أن الدراسة اقتصرت على الرصاص والزنك فقط، وكان من الممكن توسيعها لتشمل معادن ثقيلة أخرى شائعة في المياه الصناعية. بالإضافة إلى ذلك، كان من الممكن استخدام تقنيات تحليلية أكثر تقدماً لتحديد التركيب الكيميائي للزيوليت المستخدم بشكل أكثر دقة.
Questions related to the research
  1. ما هي المراحل الثلاثة لعملية إزالة المعادن الثقيلة باستخدام الزيوليت الطبيعي؟

    الامتزاز على سطح البلورات الميكروية، مرحلة التحول، والامتزاز المحدود داخل البلورات الميكروية.

  2. ما هي سعة الامتصاص القصوى للرصاص والزنك باستخدام الزيوليت الطبيعي؟

    سعة الامتصاص القصوى للرصاص هي 33.89 ملغ/غ، وللزنك هي 29.18 ملغ/غ.

  3. ما هي النماذج الرياضية المستخدمة لتقييم أداء الامتزاز في الدراسة؟

    تم استخدام نماذج خطوط تبادل امتزاز لانغموير وفريندليتش.

  4. كيف يؤثر حجم الجزيء ودرجة الحموضة على فعالية الامتزاز؟

    زيادة المساحة السطحية الخارجية عبر تقليل حجم الجزيء تؤدي إلى زيادة عدد المواقع المتوفرة لامتصاص المعدن، وزيادة درجة الحموضة (pH) تؤدي إلى زيادة فعالية الامتزاز.


References used
(Korkuna, O., Leboda, R., Skubiszewska-Zieba, J., Vrublevs’ka, T., Gun’ko, V.M., Ryczkowski, J., Structural and physicochemical properties of natural zeolites: clinoptilolite and mordenite. Microporous and Mesoporous Materials, 87, 243 – 254. (2006
(Trgo, M. and Peric, J., The effect of concentration and pH on selectivity of ion exchange in system natural zeolite – Na+/Zn2+ aqueous solutions. Faculty of Chemical Technology, University of Split, Teslina 10/V 21000 Split, Croatia.(2005
Bogdan Bogdanov, Dimitar Georgiev, Krasimira Angelova, Krasimira Yaneva : Natural zeolites: clinoptilolite BULGARIA Review . International Science conference. 4th - 5th June 2009, Stara Zagora
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