Document Details

Document Type : Thesis 
Document Title :
Retention profile and Novel methods for the determination of some inorganic and organic Pollutants in aqueous media
السلوك الإستبقائي واستحداث طرق جديدة لتقدير بعض الملوثات غير العضوية و العضوية في الأوساط المائية
 
Subject : The redox behavior of malathion pesticide in aqueous solutions and the redox, behavior of thoron -I and its selenium (IV) chelates in aqueous solution at different pH was critically investigated. The retention profile of cadmium (II) from the aqueous iodi 
Document Language : Arabic 
Abstract : The work carried out in this thesis can be summarized as follows : i. Developing of two simple, sensitive and selective methods for the determination of malathion pesticide in soil and water samples. The two methods were based upon the SW-CASV and DP-CASV of malathion in aqueous media of pH 2 after accumulation of its copper (II) complex at HMDE and measuring the corresponding reduction peak current at -0.42 V versus Ag/AgCl reference electrode. The developed methods were applied successfully for the analysis of trace and ultra trace concentration of malathion in water, pesticidal formulations, vegetables and soil sample. The developed methods were compared successfully with the standard GC-MS. The most probable reduction mechanism was safely assigned with the aid of cyclic voltammetry (CV) . ii. Studying the redox behavior of selenium (IV) – Thoron-I chelate in aqueous media of various pH at HMDE by DP-CASV and CV in an attempt to develop a highly sensitive and selective stripping voltammetric method for the chemical speciation of selenium (IV &VI) species. The method was based upon accumulation of selenium (IV)- Thoron –I complex at HMDE and measuring the current of the cathodic peak using DP-CASV. Selenium (VI) species were determined by the method after reduction to selenium (IV) with HCl to teravalent. The method was applied for the chemical speciation of selenium (IV &VI) species. The method was also applied satisfactorily for the analysis of total inorganic selenium (IV& VI) species in pharmaceutical preparation, certified reference material, water , milk and vegetables. The developed method was validated by comparison with the data obtained by ICP-MS . iii. Investigating the retention profile and kinetic characteristics of cadmium (II) uptake from the aqueous iodide media onto PQ+.Cl- immobilized PUFs solid sorbent. The reagent PQ+ .Cl- treated PUFs was successfully packed in column for complete retention and recovery of cadmium as [CdI4]-2aq at reasonable flow rate. The performance of the PQ+ .Cl- -PUFs packed columns in terms of HETP, N, critical capacity and the breakthrough capacity towards cadmium (II) was evaluated . 
Supervisor : Prof. Abu-Algani Sulaiman 
Thesis Type : Doctorate Thesis 
Publishing Year : 1431 AH
2010 AD 
Number Of Pages : 169 
Co-Supervisor : Prof. Mohammad Al-Shehawi 
Added Date : Wednesday, June 16, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
إيمان علي الحربيAl-Harbi, Eman AliInvestigatorDoctorateLoona2005@hotmail.com

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