تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
Supported hydrophobic ionic liquid on nano-silica for adsorption of lead
Supported hydrophobic ionic liquid on nano-silica for adsorption of lead
 
الموضوع : كيمياء 
لغة الوثيقة : الانجليزية 
المستخلص : The hydrophobic character incorporated into 1-methyl-3-octylimidazolium bis(trifluoromethyl-sulfonyl)imide [OMIM +Tf 2N -] based on both the anion and cation natures was employed to develop a novel solid phase extraction medium based on physical adsorption approach. Two modified nano-silica sorbents were synthesized via direct immobilization of [OMIM +Tf 2N -] on the surface of active nano-silica [NSi-OH] and amino nano-silica [NSi-NH 2] for the formation of [NSi-OH-OMIM +Tf 2N -] and [NSi-NH 2-OMIM +Tf 2N -], respectively. Surface characterization was confirmed by TGA, FT-IR and SEM. The surface coverage values were identified in the range of 1.223-1.272mmolg -1. Modified sorbents were extensively studied and characterized by their high similarity and affinity for lead extraction without the need for chelating intermediate. Excellent sorption capacity values (0.5-0.9 and 0.8-1.3mmolg -1) of lead were determined in pH 1-7. Other factors such as reaction contact time, sorbent dose, initial metal ion concentration and interfering ions were studied to spot more light on the sorption capability of loaded hydrophobic ionic liquid for application in the solid phase extraction mode. These sorbents were successfully implemented for removal and preconcentration of lead from various water samples via application of a multi-stage micro-column giving rise to percentage recovery values of lead in the range of 98.0-100.0±3.0-4%. 
ردمد : 1385-8947 
اسم الدورية : Chemical Engineering Journal 
المجلد : 166 
العدد : 1 
سنة النشر : 1432 هـ
2011 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Saturday, June 16, 2012 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
Mohamed E MahmoudMahmoud, Mohamed Eباحثدكتوراهmemahmoud10@yahoo.com
حسن مبروك البشريAlbishri, Hassan Mباحثدكتوراهhmalbeshri@kau.edu.sa

الملفات

اسم الملفالنوعالوصف
 33616.pdf pdfAbstract

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