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Adsorption of Blue Methylene from aqueous solutions on natural Syrian magnetite

امتزاز أزرق المتيلين من المحاليل المائية على الماغنتيت الطبيعي السوري

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 Publication date 2015
  fields Chemistry
and research's language is العربية
 Created by Shamra Editor




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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 compounds. 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.


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Research summary
تتناول هذه الدراسة استخدام الماغنتيت الطبيعي الموجود في الرمال الشاطئية لمنطقة وادي قنديل في سوريا في عملية إزالة صبغة أزرق المتيلين (MB) من المحاليل المائية. أظهرت قياسات الأشعة السينية (XRD) أن العينة تحتوي على الماغنتيت المتبلور بشكل جيد بالإضافة إلى بعض المركبات الأخرى. تم فصل الماغنتيت باستخدام الطريقة المغناطيسية وتبين أن نسبته في الرمال الشاطئية تشكل حوالي 70%. استخدم الماغنتيت بعد فصله في عملية إزالة MB من محاليله المائية عند تراكيز ابتدائية مختلفة وجرعات مختلفة من الماغنتيت عند قيم مختلفة من pH ودرجة حرارة 25°C. أظهرت النتائج أن امتزاز أزرق المتيلين يزداد بزيادة التركيز الابتدائي ويتناقص بزيادة قيمة pH، كما تبين أن نسبة إزالة MB تزداد بزيادة كمية الماغنتيت المستخدم، حيث كانت نسبة الإزالة 88.7%، 84.9%، 47.8% عند استخدام جرعات من الماغنتيت 1g، 0.5g، 0.2g على الترتيب عند تركيز معين لـ MB يساوي 5mg/l. أظهرت معالجة البيانات الامتزازية وفق نموذجي لانغموير وفرندلش أن عملية امتزاز MB تحدث على المراكز المتجانسة الطاقة وفق نموذج لانغموير وعلى المراكز غير المتجانسة الطاقة وفق نموذج فرندلش. توصلت الدراسة إلى أن الماغنتيت الطبيعي يمكن أن يكون مادة فعالة في إزالة الصبغات من المحاليل المائية بتكلفة اقتصادية منخفضة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة في مجال معالجة المياه باستخدام مواد طبيعية متوفرة محلياً، مما يسهم في تقليل التكلفة الاقتصادية لهذه العمليات. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها في المستقبل. أولاً، الدراسة لم تتناول بشكل كاف تأثير العوامل البيئية الأخرى مثل وجود ملوثات أخرى في الماء والتي قد تؤثر على كفاءة الامتزاز. ثانياً، لم يتم التطرق إلى إمكانية إعادة استخدام الماغنتيت بعد عملية الامتزاز، وهو جانب مهم لتقييم الجدوى الاقتصادية والبيئية لهذه الطريقة. أخيراً، يمكن توسيع الدراسة لتشمل تجارب ميدانية حقيقية بدلاً من الاعتماد فقط على التجارب المخبرية، مما يعطي نتائج أكثر واقعية وقابلة للتطبيق.
Questions related to the research
  1. ما هي النسبة المئوية للماغنتيت في الرمال الشاطئية لمنطقة وادي قنديل؟

    تشكل نسبة الماغنتيت في الرمال الشاطئية لمنطقة وادي قنديل حوالي 70%.

  2. كيف يؤثر تركيز أزرق المتيلين الابتدائي على عملية الامتزاز؟

    يزداد امتزاز أزرق المتيلين بزيادة التركيز الابتدائي لـ MB في المحلول.

  3. ما هو تأثير قيمة pH على عملية الامتزاز؟

    يتناقص امتزاز أزرق المتيلين بزيادة قيمة pH الوسط.

  4. ما هي النماذج التي استخدمت لمعالجة البيانات الامتزازية؟

    استخدمت نماذج لانغموير وفرندلش لمعالجة البيانات الامتزازية.


References used
KRYLOV O.V. Heterogeneous catalysis : textbook , Akademknig , 2004 , 679
MAURICIO MODREL ; FRANCISCO MARTINES ; EDGAR MOSQUERA . Synthesis and characterization of magnetite nanoparticles from meniral magnetite . J . of magnetism and magnetic material , 2013 , 343 , pp. 76-81
EUN-HEELEE ; CHANG-YEOUL ; YONG-HO CHOA . Magnetite nanoparticles dispersed with in nanoporous aerogels for hyperthermia application . J. of current Appl phys . 2012,12,547-552
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