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Synthesis of core-shell structured microspheres and their application in separation of cadmium from aqueous solutions
المؤلفون المشاركون
Shihah, R. R.
Musa, S. I.
Tadros, N. A.
المصدر
Arab Journal of Nuclear Sciences and Applications
العدد
المجلد 46، العدد 4 (30 نوفمبر/تشرين الثاني 2013)، ص ص. 1-16، 16ص.
الناشر
الجمعية المصرية للعلوم النووية و تطبيقاتها
تاريخ النشر
2013-11-30
دولة النشر
مصر
عدد الصفحات
16
التخصصات الرئيسية
الملخص EN
A simple process to fabricate magnetic porous microspheres of calcium hydroxyapatite was demonstrated.
The magnetic microspheres were synthesized by utilizing calcium hydroxyapatite as a core and iron oxide nanoparticles as a shell.
The properties of the prepared magnetic microspheres were characterized by BET surface area measurements, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD) analysis, scanning electron microscopy (SEM) and energy dispersive analysis system of X-ray (EDS).
Furthermore, the microspheres were applied to remove cadmium from aqueous solutions using batch technique.
The influence of different sorption parameters, such as equilibration time, initial concentration of metal ion, pH value of solution, temperature and ionic strength on the separation of cadmium were studied and discussed.
It was found that the amount of Cd(II) ion sorbed at equilibrium was 61.22 mg g-1 with 75 % removal occurring at the first 5 hrs.
The removal was pH and ionic strength dependent and was hypothesized to be achieved through an ion exchange process and surface complex mechanism in neutral medium.
Meanwhile, precipitation was the relevant mechanism in removal of cadmium at pH > 9.
The isotherm models of Temkin, Dubinin–Radushkevich (D–R) and Redlich–Peterson (R-P) were used to describe the sorption at the solid-liquid interface.
Data suggest that there may be variation in the physicochemical phenomena involving metal adsorption.
The mean adsorption energies evaluated using the D–R model indicated that the separation of Cd(II) was taken place by chemisorption.
The thermodynamic parameters (ΔGo, ΔHo and ΔSo) showed that the removal of cadmium ions was feasible, spontaneous and endothermic process at 30–60 °C.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Shihah, R. R.& Musa, S. I.& Tadros, N. A.. 2013. Synthesis of core-shell structured microspheres and their application in separation of cadmium from aqueous solutions. Arab Journal of Nuclear Sciences and Applications،Vol. 46, no. 4, pp.1-16.
https://search.emarefa.net/detail/BIM-723998
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Shihah, R. R.…[et al.]. Synthesis of core-shell structured microspheres and their application in separation of cadmium from aqueous solutions. Arab Journal of Nuclear Sciences and Applications Vol. 46, no. 4 (Nov. 2013), pp.1-16.
https://search.emarefa.net/detail/BIM-723998
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Shihah, R. R.& Musa, S. I.& Tadros, N. A.. Synthesis of core-shell structured microspheres and their application in separation of cadmium from aqueous solutions. Arab Journal of Nuclear Sciences and Applications. 2013. Vol. 46, no. 4, pp.1-16.
https://search.emarefa.net/detail/BIM-723998
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references : p. 15-16
رقم السجل
BIM-723998
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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