Document Details

Document Type : Thesis 
Document Title :
“ CHROMATOGRAPHIC SEPARATION OF A SERIES OF HEAVY METAL IONS FROM AQUEOUS MEDIA USING POLYURETHAN FOAM SORBENT AND OTHER EXTRACTING AGENTS”
" الفصل الكروماتوجرافى لبعض العناصر الثقيلة من الأوساط المائية بواسطة البلاستيك الرغوى و مواد الفصل الأخرى"
 
Subject : Faculty of Sciences 
Document Language : Arabic 
Abstract : Recently great attention has been focused on developing low cost and efficient procedures for removal and / or determination of inorganic contaminates in water e.g. tungsten, lead, antimony etc. On the other hand, improving the sensitivity and selectivity of trace metals analysis represents an important task. Thus, many research papers have been focused on the development of novel analytical methods of high sensitivity and selectivity for trace and ultra- trace contaminates . Moreover, the direct determination of trace and ultra- trace metal ions usually requires an efficient preconcentration step in order to bring the concentration of the analyte within the dynamic measuring range of detection and to eliminate the matrix effect and interference that cannot be manipulated by the measuring device. Therefore, the overall work in this thesis can be summarized as follows: 1. Chapter one includes an excellent literature survey on the source, occurrences, mode of action, toxicity, methods of removal and / or subsequent determination of heavy metal ions in water at trace and ultra- trace concentrations. Moreover, the literature survey has been also focused on pollution by tungsten and lead species. 2. Chapter two reports: i. Detailed study on the retention profile, kinetics and thermodynamic characteristics, adsorption models and the most probable retention mechanism for the uptake of tungsten by the sorbent were critically investigated and properly assigned. ii. tungsten uptake by the used AgNPs/AC solid phase extractor was successfully subjected to Langmuir, the Dubinin – Radushkevich (D – R), and Freundlich isotherms models and satisfactorily results were achieved. The capacity of AgNPs/AC towards tungsten (VI) calculated from sorption isotherm was determined. iii. Extraction and separation of the tested tungsten (VI) was successfully achieved by sorbent packed column 3. Chapter three was focused on: i. The retention profile of lead (II) species in aqueous media onto local clay in an attempt to develop an efficient procedure for removal and subsequent determination of lead (II) in aqueous media using clay packed column. ii. The kinetics, and thermodynamic characteristics of lead (II) uptake by the local clay were critically investigated and are properly assigned. The most probable retention mechanism for lead (ІІ) sorption involving a “weak base anion ion exchanger” and retention onto the sorbent. The sorption isotherm of lead (II) over wide range of equilibrium concentrations was also studied and the system was modeled by Langmuir, Freundlich, and Dubinin – Radushkevich (D – R) isotherms. The capacity of clay towards lead (II) calculated from sorption isotherm was determined. 
Supervisor : Prof. Mohammad. S. El-Shahawi 
Thesis Type : Master Thesis 
Publishing Year : 1439 AH
2018 AD 
Co-Supervisor : Dr. Latifa Abu Bakr Ahmed Khatib 
Added Date : Monday, July 2, 2018 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
مها نغيمش الأحمديAl-Ahmadi, Maha NughaymieshResearcherMaster 

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