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Removal Efficiency of Polycyclic Aromatic Hydrocarbons From Synthetic Water Samples By Electrocoagulation Processes

كفاءة إزالة الفحوم الهيدروجينية العطرية المتعددة الحلقات من المياه بعمليات التخثير الكهربائي

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 Publication date 2010
and research's language is العربية
 Created by Shamra Editor




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In the present work, batch electrocoagulation experiments were carried out to evaluate the removal of polycyclic aromatic hydrocarbon (PAHs) from water using aluminum electrodes. The effects of initial pH, current density, electrolysis time, initial concentration of PAHs, electrolyte type, and electrolyte concentration were investigated to achieve the optimal removal efficiency. The results indicated that the electrocoagulation utilizing the aluminum, as anode and cathode, was an efficient tool in the reduction of these contaminants. The treatment process was found to be largely affected by the current density and the initial composition of water. The removal rate was significantly increased using NaCl as an electrolyte where indirect oxidation by hypochlorite forming later during the treatment was occurred. The results demonstrated that the technical feasibility of the electrocoagulation as a possible and reliable technique for the treatment of PAHs contaminants in water.


Artificial intelligence review:
Research summary
تناولت هذه الدراسة كفاءة إزالة الهيدروكربونات العطرية متعددة الحلقات (PAHs) من عينات مياه صناعية باستخدام عملية التخثير الكهربائي. تم استخدام أقطاب الألمنيوم في التجارب وتم دراسة تأثير عدة عوامل منها درجة الحموضة الأولية، كثافة التيار، وقت التحليل الكهربائي، تركيز PAHs الأولي، نوع الإلكتروليت، وتركيز الإلكتروليت لتحقيق الكفاءة المثلى للإزالة. أشارت النتائج إلى أن التخثير الكهربائي باستخدام الألمنيوم كان أداة فعالة في تقليل هذه الملوثات. كانت عملية المعالجة متأثرة بشكل كبير بكثافة التيار والتركيب الأولي للمياه. زادت نسبة الإزالة بشكل كبير عند استخدام NaCl كإلكتروليت حيث حدثت أكسدة غير مباشرة بواسطة الهيبوكلوريت المتكون أثناء المعالجة. أظهرت النتائج الجدوى التقنية للتخثير الكهربائي كطريقة ممكنة وموثوقة لمعالجة ملوثات PAHs في المياه.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة لأنها تسلط الضوء على فعالية استخدام التخثير الكهربائي في إزالة ملوثات PAHs من المياه. ومع ذلك، هناك بعض النقاط التي يمكن تحسينها. أولاً، كان من الأفضل تضمين دراسات مقارنة مع تقنيات معالجة أخرى لتوضيح مدى تفوق التخثير الكهربائي. ثانياً، لم يتم التطرق بشكل كافٍ إلى التأثيرات البيئية المحتملة للنواتج الثانوية المتكونة أثناء المعالجة. ثالثاً، كان من الممكن توسيع نطاق الدراسة ليشمل عينات مياه حقيقية من مصادر مختلفة لتحسين تطبيق النتائج على الواقع العملي. وأخيراً، يمكن تحسين الدراسة بإضافة تحليل اقتصادي لتقييم تكلفة العملية مقارنة بطرق المعالجة التقليدية.
Questions related to the research
  1. ما هي العوامل التي تم دراستها لتحقيق الكفاءة المثلى لإزالة PAHs؟

    تم دراسة تأثير درجة الحموضة الأولية، كثافة التيار، وقت التحليل الكهربائي، تركيز PAHs الأولي، نوع الإلكتروليت، وتركيز الإلكتروليت لتحقيق الكفاءة المثلى للإزالة.

  2. ما هو الدور الذي يلعبه NaCl في عملية التخثير الكهربائي؟

    يعمل NaCl كإلكتروليت ويزيد من نسبة الإزالة بشكل كبير حيث يحدث أكسدة غير مباشرة بواسطة الهيبوكلوريت المتكون أثناء المعالجة.

  3. ما هي النتائج التي توصلت إليها الدراسة بخصوص كفاءة التخثير الكهربائي باستخدام الألمنيوم؟

    أظهرت الدراسة أن التخثير الكهربائي باستخدام الألمنيوم كان أداة فعالة في تقليل ملوثات PAHs، حيث يمكن أن تصل نسبة الإزالة إلى 98.85% تحت الظروف المثلى.

  4. ما هي التوصيات لتحسين فعالية التخثير الكهربائي في إزالة PAHs؟

    التوصيات تشمل تحسين دراسة التأثيرات البيئية للنواتج الثانوية، توسيع نطاق الدراسة لتشمل عينات مياه حقيقية، وإضافة تحليل اقتصادي لتقييم تكلفة العملية مقارنة بطرق المعالجة التقليدية.


References used
Muff, J., Søgaard, E.G. (2010). Electrochemical degradation of PAH compounds in process water: a kinetic study on model solutions and a proof of concept study on runoff water from harbour sediment purification. Water Science & Technology, Vol. 61, No. 8, 2043–2051
Gao, Y., Ling, W., Wong, H. M. (2006). Plant-accelerated dissipation of phenanthrene and pyrene from water in the presence of a nonionic-surfactant. Chemosphere, Vol. 63, No. 9, 1560–1567
Alcántara, M. T., Gómez, J., Sanromán, M. A. (2008). Combined treatment of PAHs contaminated soils using the sequence extraction with surfactant– electrochemical degradation, Chemosphere. Vol. 70, No. 8, 1438–1444
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