تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Adsorption of polycyclic aromatic hydrocarbons onto activated carbon from non-aqueous media: 1. the influence of the organic solvent polarity
Adsorption of polycyclic aromatic hydrocarbons onto activated carbon from non-aqueous media: 1. the influence of the organic solvent polarity
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : Polycyclic aromatic hydrocarbons (PAHs) can be formed easily during the refinery processes of crude petroleum. Their accumulation poses serious operating problems and their removal is of great importance. In this investigation we tested the ability of activated carbon to remove a number of the PAHs compounds from mixtures of organics solvents, with different chemicals structures and polarities. Batch adsorption tests were used to investigate the effect of chemical structures and polarities of solvents on the adsorption of naphthalene, anthracene, and pyrene on activated carbon. Our investigation revealed that aromatic solvents have high affinity for activated carbon and therefore, inhibit PAHs adsorption, while polar solvents have low affinity for activated carbon and consequently the adsorbent sites are more available for the PAHs molecules. This behavior can be explained by the fact that the PAHs and benzene molecules are able to form π-π complex between π- electrons of benzene rings and active sites on an activated carbon surface. An increase in the molecular weight of aliphatic solvents such as hexane and heptane has little effect on adsorption of PAHs to activated carbon. However, cyclic hydrocarbon solvents such as cyclohexane increase the adsorption of small PAHs and decrease the adsorption of heavier PAHs molecules, probably as a result of differences in solubilities. 
ردمد : 0149-6395 
اسم الدورية : Separation Science and Technology 
المجلد : 42 
العدد : 16 
سنة النشر : 1428 هـ
2007 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Saturday, December 17, 2011 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
Ali M DowaidarDowaidar, Ali Mباحثدكتوراه 
محمد سرور الشهاويEl-Shahawi, Mohammad Sباحثدكتوراهmohammad_elshahawi@yahoo.co.uk
Ibrahim AshourAshour, Ibrahim باحثدكتوراه 

الملفات

اسم الملفالنوعالوصف
 31685.pdf pdfAbstract

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