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1393/1/24، جلد ۶، شماره ۱، صفحات -
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Adsorption of Polycyclic Aromatic Hydrocarbons on Activated Carbons: Kinetic and Isotherm Curve Modeling |
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| چکیده انگلیسی مقاله |
The modeling of kinetic and isotherm curves acquired in adsorption of polycyclic aromatic hydrocarbons (PAHs) as a model compound (phenanthrene) on activated carbons in the organic solvent. All the runs were carried out in a batch system at atmospheric pressure, with a process temperature of 24± 2°C and using the 100 ml phenanthrene with cyclohexan. This experimental work is mainly focused on the study of how the variables properties such as adsorbent dosage, the initial phenanthrene concentration, contact time and pH of cyclohexane solutions influence the kinetic and isotherm of the adsorption process. The results indicated that pH did not play a key role in the process of phenanthrene adsorption. The considerable adsorption (8.34 mg/g) is reached at pH 7, adsorbent dosage of 0.3g/100ml and agitation time of 11hours on activated carbons. The impact of adsorbent dose on phenanthrene concentration was not important after 0.3g/100ml. The results also showed that adsorption capacity became notably greater with an increase in contact time and initial phenanthrene concentration. The surprising outcome of this work is that adsorption processes and equilibrium data well fitted by pseudo-second-order kinetic (R 2 = 0.99) and Fraundlich adsorption models (R 2 = 0.99). It can be concluded that there was a significant positive correlation between adsorption processes and the Freundlich isotherm model but Langmuir theory showed only a weak association. |
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| کلیدواژه‌های انگلیسی مقاله |
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| نویسندگان مقاله |
30455---30456---30457---30458---30459---30460---30461--- |
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| نشانی اینترنتی |
http://ijoh.tums.ac.ir/index.php/ijoh/article/viewArticle/188 |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
Articles |
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