Sorption of Ammonium Ions onto Natural and Modified Egyptian Kaolinites : Kinetic and Equilibrium Studies
المؤلفون المشاركون
El-Shafey, Ola I.
Fathy, Nady A.
El-Nabarawy, Thoria A.
المصدر
Advances in Physical Chemistry
العدد
المجلد 2014، العدد 2014 (31 ديسمبر/كانون الأول 2014)، ص ص. 1-12، 12ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2014-04-23
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الملخص EN
Thermally activated, acid-activated, and acid-leached of thermally activated kaolinites were prepared from the Egyptian ore.
The physical and chemical properties were studied using N2 sorption at −196°C, FTIR, SEM, and the total surface acidity.
The sorption of NH4+ ions on the investigated sorbents was controlled with the solution pH, sorbent dosage, and initial concentration of NH4+ solution.
Kinetic and equilibrium NH4+ sorption at 30°C were employed.
Four kinetic models were applied to the kinetic sorption data; pseudo-second-order, Elovich, and intraparticle diffusion models fitted well the kinetic data whereas pseudo-first-order model was less applicable.
Elovich parameters refer to physical sorption type of NH4+ on nonuniform sites and the intraparticle diffusion controls the sorption of NH4+ by kaolinites to a small extent.
The equilibrium sorption data followed Langmuir and D-R models; the negative value of ΔG indicates a spontaneous sorption and the mean sorption energy obtained shows also physical sorption.
The sorption capacities of nonactivated and activated Egyptian kaolinites towards NH4+ sorption (10.87–45.45 mg·g−1) were good sorbents as compared with those uptaken by other clays reported in the literature and proved to be more active besides being less expensive and highly available.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
El-Shafey, Ola I.& Fathy, Nady A.& El-Nabarawy, Thoria A.. 2014. Sorption of Ammonium Ions onto Natural and Modified Egyptian Kaolinites : Kinetic and Equilibrium Studies. Advances in Physical Chemistry،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-509525
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
El-Shafey, Ola I.…[et al.]. Sorption of Ammonium Ions onto Natural and Modified Egyptian Kaolinites : Kinetic and Equilibrium Studies. Advances in Physical Chemistry No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-509525
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
El-Shafey, Ola I.& Fathy, Nady A.& El-Nabarawy, Thoria A.. Sorption of Ammonium Ions onto Natural and Modified Egyptian Kaolinites : Kinetic and Equilibrium Studies. Advances in Physical Chemistry. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-509525
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-509525
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر