Preparation, Characterization and Theoretical Study of Metal Complexes Derived from N5 Acyclic Ligand
Mahmoud Najim Al-jibouri,
Omar Hamad Shehab AL-Obaidi
Issue:
Volume 1, Issue 3, August 2013
Pages:
37-42
Received:
16 June 2013
Published:
30 August 2013
Abstract: The complexes of a new pentadentate acyclic ligand derived from 1,2-diamino benzen and 2,6-diacetylpyridine ,with vanadium(IV), Mn(II) and Fe(III )have been synthesized and characterized on the bases of their elemental analysis, GS mass for ligand, conductivity, magnetic moments in addition to spectral data of IR and UV-Visible Spectra. Metal to ligand ratio in all complexes has been found to be (1:1). The polydentate ligand behaves as N5 system upon linkage with Fe(III) and Mn(II) ions. All the complexes have been assigned as octahedral geometries of general formula [MnL]Cl, [FeLCl]Cl2 and [VOL]SO. A theoretical treatment of the formation of complexes in the gas phase was studied; this was done using the HYPERCHEM-6 program for the Molecular mechanics and Semi-empirical calculations.
Abstract: The complexes of a new pentadentate acyclic ligand derived from 1,2-diamino benzen and 2,6-diacetylpyridine ,with vanadium(IV), Mn(II) and Fe(III )have been synthesized and characterized on the bases of their elemental analysis, GS mass for ligand, conductivity, magnetic moments in addition to spectral data of IR and UV-Visible Spectra. Metal to li...
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Performances Analysis of the Reverse Osmosis Desalination Plant of Brackish Water Used for Irrigation: Case Study
Nada. El Harrak,
Fatima. Elazhar,
Abdel ali. Zdeg,
Nourdine. Zouhri,
Maryem. Elazhar,
Azzeddine. Elmidaoui.
Issue:
Volume 1, Issue 3, August 2013
Pages:
43-48
Received:
7 August 2013
Published:
30 August 2013
Abstract: Desalinated brackish water is becoming an important water source for agricultural irrigation. In Brackish water desalination, pretreatment of reverse osmosis is the key step in designing the plants to avoid membrane fouling and scaling. It is enormously important to carry out a study designed at ensuring the optimization of the pretreatment system for brackish desalination plant in order to optimize the quality of the water fed through the reverse osmosis membranes, to guarantee the highest performance and to minimize the number of shutdowns for chemical cleaning. In this paper, performance evaluation carried out for a brackish water reverse osmosis plant for agricultural application, located in Dokkala Region in Morocco. This plant showed poor performances after few months of operating and frequent shutdown. The operating pressure increased significantly and the permeate conductivity decreased surprisingly. To identify the causes for the poor performance, different investigations were carried out. Thus, the pretreatment scheme was thoroughly reviewed to find out the causes of anomalies. The problem was resolved by removing chlorination and sodium bisulfate steps from the pretreatment.
Abstract: Desalinated brackish water is becoming an important water source for agricultural irrigation. In Brackish water desalination, pretreatment of reverse osmosis is the key step in designing the plants to avoid membrane fouling and scaling. It is enormously important to carry out a study designed at ensuring the optimization of the pretreatment system ...
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