Sorption of uranium on some natural modified clay mineral deposits
العناوين الأخرى
ادمصاص اليورانيوم على بعض رواسب معادن طينية معدلة
المؤلفون المشاركون
al-Ninah, M. E.
Rifai, Huda Abd al-Nabi
Rabi, Faridah Hamid
Mursi, Ahmad Mursi Ahmad
المصدر
Arab Universities Journal of Agricultural Sciences
العدد
المجلد 27، العدد 4 (30 سبتمبر/أيلول 2019)، ص ص. 2329-2340، 12ص.
الناشر
تاريخ النشر
2019-09-30
دولة النشر
مصر
عدد الصفحات
12
التخصصات الرئيسية
الموضوعات
الملخص EN
Bentonite and Kaolinite clay sediments - as low cost adsorbents- were prepared, characterized, and tested for uranium removal from uranium rich-soil of Wadi Um Hamad region S.
W.
Sinai which have total uranium 260 mg/ kg.
Some factors that influence the uranium removal efficiency onto clay samples: initial uranium concentrations, contact time and pH were also studied in detail.
Modification of clay samples were carried out by acid activation.
Results showed that the U adsorption was pH dependent.
The maximum U adsorption value was at pH 5 and 6 for bentonite and kaolinite, respectively.
In addition, results indicated that temperature had not any influence on the adsorption efficiency.
The adsorption capacities of the two minerals after 90 min are almost similar.
Our obtained results revealed that by increasing U ions concentrations from 50 mg/L to 200 mg/L adsorption was stable for kaolinite while for bentonite there was slight decrease, after that with increasing in the U (VI) ions concentration the efficiency decreased for both adsorbents.
Calcination is more effective in increasing the removal efficiency of bentonite than acid activation.
Calcination of the kaolinite (heating the clay at 400oC followed by agitating with 1.5 N HCl) increased that removal efficiency from 42% to 90% .
XRD pattern show the destruction of the characteristic diffraction peaks of the kaolinite (7.15 A° and 3.15 A°) at (70oC or 400oC).
This is similar to behavior of bentonite, as the acid treatment with HCl has broken its lattice structure more than heating to 400oC.
U removal efficiency by bentonite and kaolinite were 95.4% and 90.8% , respectively.
Four adsorption isotherm models were tested and revealed that achieved experimental data fitted well with langmuir- model.
The uranium adsorption efficiency follow Langmuir isotherm with a capacity 18.68 mg/g for modified kaolinite and 27.4 mg/g for modified bentonite.
Comparing the adsorption capacity of both minerals after modification, it could be noticed that, it is almost similar 93% and 90% for bentonite and kaolinite, respectively.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Rifai, Huda Abd al-Nabi& Rabi, Faridah Hamid& al-Ninah, M. E.& Mursi, Ahmad Mursi Ahmad. 2019. Sorption of uranium on some natural modified clay mineral deposits. Arab Universities Journal of Agricultural Sciences،Vol. 27, no. 4, pp.2329-2340.
https://search.emarefa.net/detail/BIM-999937
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Rifai, Huda Abd al-Nabi…[et al.]. Sorption of uranium on some natural modified clay mineral deposits. Arab Universities Journal of Agricultural Sciences Vol. 27, no. 4 (2019), pp.2329-2340.
https://search.emarefa.net/detail/BIM-999937
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Rifai, Huda Abd al-Nabi& Rabi, Faridah Hamid& al-Ninah, M. E.& Mursi, Ahmad Mursi Ahmad. Sorption of uranium on some natural modified clay mineral deposits. Arab Universities Journal of Agricultural Sciences. 2019. Vol. 27, no. 4, pp.2329-2340.
https://search.emarefa.net/detail/BIM-999937
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
-
رقم السجل
BIM-999937
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