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Register a new userRemoval 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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أجريت سلسلة من تجارب التخثير الكهربائي لتقييم عملية إزالـة الفحـوم الهيدروجينيـة العطريـة المتعددة الحلقات (PAHs) من المياه باستخدام مسارٍ من الألمنيوم. درس تأثير كلٍ من درجة الحموضـة الابتدائية و كثافة التيار الكهربائي و زمن التحلل الكهربائي و التركيز الأولي الكلـي لمركبـات الــ PAH و نوع الكهرليت و تركيزه في هذه المعالجة، للوصول إلى كفاءة الإزالة المثلى. أشارت النتائج إلى فعاليـة استخدام التخثير الكهربائي بوجود مصعد و مهبط من الألمنيوم في نزع هذه الملوثـات. وجـد أن عمليـة المعالجة تتأثر بشدةٍ بكثافة التيار الكهربائي و بتركيز الملوثات، و لوحظ حدوث ازديادٍ كبير في معدل الإزالة عند استخدام كلوريد الصوديوم ككهرليت نتيجة حدوث عمليات أكسدة غير مباشرة بواسطة الهيبوكلوريت المتشكل لاحقاً خلال عملية المعالجة. بينت النتائج الجدوى العملية من استخدام التخثير الكهربائي بوصفها تقنية واعدة لمعالجة تلوث المياه بالفحوم الهيدروجينية العطرية المتعددة الحلقات.
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.
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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pH on turbidity reducing , and the effect of slow mixing time
on turbidity .
And turbidity reducing by AL2(SO4)3·18 H2O was removed 96
% of the total turbidity.
And turbiditu reducing by FeSO4.7H2O was removed 98 % of
the total turbidity.
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