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Timezgana, Morocco

Essaghouani A.L.,Mohammed V University | Elmsellem H.,University Mohammed Premier | Ellouz M.,Mohammed V University | El Hafi M.,Mohammed V University | And 6 more authors.
Der Pharma Chemica | Year: 2016

Adsorption of 1-Ethyl-4-phenyl-2,3-dihydro-1H-1,5-benzodiazepin-2-one (P1) on mild steel surface in 1 M HCl solution and its corrosion inhibition properties has been studied by a series of techniques, such as polarization, electrochemical impedance spectroscopy (EIS), weight loss and quantum chemical calculation methods. Potentiodynamic polarization measurements showed that 1,5-benzodiazepine derivative inhibitor is mixed type. The degree of surface coverage was determined by using weight loss measurements and it was found that adsorption process of studied inhibitor on mild steel surface obey Langmuir adsorption isotherm. Source

Essaghouani A.L.,Mohammed V University | Elmsellem H.,University Mohammed Premier | Boulhaoua M.,Mohammed V University | Ellouz M.,Mohammed V University | And 6 more authors.
Der Pharma Chemica | Year: 2016

1-Benzyl-4-phenyl-2, 3-dihydro-1H-1,5-benzodiazepin-2-one (P1) was described as novel potent corrosion inhibitor for mild steel in 1M HCl. The inhibitive characteristic of compound (P1) was studied in detail via gravimetric measurement, electrochemical impedance spectroscopy and potentiodynamic polarization. In addition, a quantum chemical study suggests that the 1-Benzyl-4-phenyl-2, 3-dihydro-1H-1,5-benzodiazepin-2-one (P1) ring involved in this inhibitor is structurally essential for the protection of metal surface. Source

Bouhlassa S.,Mohammed V University | Ammary B.,Mohammed V University | Pare S.,Mohammed V University | Pare S.,Laboratoire Of Chimie Organique | Safsaf N.,Mohammed V University
Hydrogeology Journal | Year: 2016

In arid regions, knowledge of the evaporation rate from the water table is essential for appropriate management of scarce resources and to prevent land degradation. Soil chloride profiles in the unsaturated zone of a bare soil in an arid area of south-eastern Morocco were used to assess the evaporation flux, using chloride inventories in conjunction with evaporative demand. Moisture fluxes were calculated from measured chloride concentrations on the basis of a steady-state flow model. The chloride profiles displayed large variations in concentrations and had (1) low chloride concentrations near the soil surface, (2) maximum chloride concentrations at depths of 11–14 cm beneath the soil surface, respectively in July and February, and (3) gradually decreasing chloride concentrations while depth increased below these peaks. Evaporative demands were found to be inversely proportional to the depth of evaporation fronts and proportional to evaporation fluxes. In addition, the evaporation along the profiles seems to be controlled by the soil composition and texture. The investigation of chloride profiles in February and July enabled the determination of a value for annual evaporation (∼30 mm), which is in good agreement with the value estimated by the Allison-Barnes type model (∼32 mm). © 2016 Springer-Verlag Berlin Heidelberg Source

Salhi A.,Laboratoire Of Leau Et Of Lenvironnement | Aarfane A.,Laboratoire Of Leau Et Of Lenvironnement | Tahiri S.,Laboratoire Of Leau Et Of Lenvironnement | Khamliche L.,Laboratoire Of Chimie Organique | And 4 more authors.
Journal of Materials and Environmental Science | Year: 2014

In this work, the degradation of Orange Acid 7 (OA7) dye by heterogeneous photocatalysis using a non-stoichiometric hydroxyapatite doped with titanium was investigated. First, the developed catalyst was characterized by different analytical techniques such as XRD, FTIR and TGA-DTA. Its effectiveness in degrading OA7 dye was then studied in a batch reactor. The effect of several parameters such as concentration, pH and irradiation time on photodegradation efficiency was investigated. Obtained results show that composite material HAP-Titanium has a significant photocatalytic activity complete discoloration of dying solution can be achieved after 16 hours of irradiation. Results show that discoloration performance depends on the catalyst mass, its titanium content, the initial dye concentration and the presence of oxygen in medium. However, photodegradation is little affected by the variation of pH of treated solutions. Increasing the mass of the catalyst and its percentage of titanium improves considerably the efficiency and the speed of discoloration. The optimum mass of the catalyst HAP-Titanium (Ti 11%) is about 2 g per liter of solution. Obtained results also show that discoloration yield decreases by increasing the initial concentration of dye and that the presence of oxygen in medium improves further the phodegradation phenomenon. Source

Harit T.,Laboratoire Of Chimie Organique | Harit T.,University Mohammed Premier | Isaad J.,Moulay Ismai University | Isaad J.,University Mohammed Premier | And 2 more authors.
Tetrahedron | Year: 2016

The synthesis of a new functionalized tetrapyrazolic macrocycle with two bidentate bipyrazolic subunits and a lipophilic moiety bearing a donor-group is described. The complexing properties of this macrocycle towards the alkali metal ions (Li+, Na+, K+, Cs+) were studied by liquid-liquid extraction, and they showed a good extraction ability for Li+ and Na+, and a remarkable selectivity for the lithium cation in competitive conditions. © 2016 Elsevier Ltd. Source

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