Browsing by Author "Benosmane, Nadjib"
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Item Chimie-1 : structure de la matière(Université M'Hamed Bougara Boumerdès, 2017) Benosmane, NadjibCe livre de Chimie Générale s’adresse aux étudiants en Licences L1 de Sciences et Technologies (ST) et Sciences de la Matière (SM) des premières années d’études supérieures. Il traite la structure de la matière (description de l’atome : constituants, stabilité, propriétés, formation de liaison et molécule……etc). Le cours est présenté selon le socle commun de domaine Sciences et Technologies 2013, il est renforcé avec des exemples d’application afin d’aider l’étudiant à mieux assimiler les nouvelles notions pour mener à bien son examen.Item Citric acid removal from aqueous solutions using a polymer inclusion membrane based on a mixture of CTA and CA(Taylor & Francis, 2018) Benosmane, Nadjib; Boutemeur, Baya; M Hamdi, Safouane; Hamdi, MaamarItem A convenient synthesis of pyrandione derivatives using P-toluenesulfonic acid as catalyst under ultrasound Irradiation(2016) Benosmane, Nadjib; Boutemeur, B.; Hamdi, S.M.; Hamdi, M.A new series of 3,3'-{alkane-α,ω-diylbis[imino-eth-1-yl-1-ylidene]}bis(6-methyl-2H-pyran- 2,4(3H)-dione) derivatives (3c-e) has been synthesized by the convenient ultrasound-mediated condensation of a diamine with dehydroacetic acid in the presence of a catalytic amount of p- toluenesulfonic acid. The structure of all synthesized compounds was elucidated by IR spectroscopy, 1H NMR spectroscopic spectra, elemental analysis, and mass spectroscopy. A tautomeric form for the derivatives species is also proposedItem Presence of Heavy Metals in Irrigation Water, Soils, Fruits, and Vegetables: Health Risk Assessment in Peri-Urban Boumerdes City, Algeria(Multidisciplinary Digital Publishing Institute (MDPI), 2024) Aksouh, Mohamed Younes; Boudieb, Naima; Benosmane, Nadjib; Moussaoui, Yacine; Michalski, Rajmund; Klyta, Justyna; Kończyk, JoannaThis study investigates heavy metal contamination in soils, irrigation water, and agricultural produce (fruits: Vitis vinifera (grape), Cucumis melo var. saccharimus (melon), and Citrullus vulgaris. Schrade (watermelon); vegetables: Lycopersicum esculentum L. (tomato), Cucurbita pepo (zucchini), Daucus carota (carrot), Lactuca sativa (lettuce), Convolvulus Batatas (potato), and Capsicum annuum L. (green pepper)) in the Boumerdes region of Algeria. The concentrations of seven heavy metals (cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), nickel (Ni), lead (Pb), and zinc (Zn)) in soil and food samples were analyzed using atomic absorption spectrometry. Health risks associated with these metals were evaluated through the estimated daily intake (EDI), non-carcinogenic risks (using target hazard quotient (THQ), total target hazard quotient (TTHQ), and hazard index (HI)), and carcinogenic risks (cancer risk factor (CR)). Statistical analyses, including cluster analysis (CA) and Pearson correlation, were conducted to interpret the data. The results revealed the highest metal transfer as follows: Cd was most significantly transferred to tomatoes and watermelons; Cr to carrots; Cu to tomatoes; and Fe, Ni, Pb, and Zn to lettuce. Among fruits, the highest EDI values were for Zn (2.54·10−3 mg/day) and Cu (1.17·10−3 mg/day), with melons showing the highest Zn levels. For vegetables, the highest EDI values were for Fe (1.68·10−2 mg/day) and Zn (8.37·10−3 mg/day), with potatoes showing the highest Fe levels. Although all heavy metal concentrations were within the World Health Organization’s permissible limits, the HI and TTHQ values indicated potential health risks, particularly from vegetable consumption. These findings suggest the need for ongoing monitoring to ensure food safety and mitigate health risks associated with heavy metal contamination.Item Removal of basic dyes from aqueous solutions using calix[4]resorcinarene carboxylic acid derivatives(University of Mohammed Premier Oujda, 2015) Benosmane, Nadjib; Boutemeur, Baya; Hamdi, Safouane M.; Hamdi, MaamarWater-insoluble calix[4]resorcinarenes derivative 1 and 2 were synthesized and used as sorbents to extract selected basic dyes rhodamine B (RB), methylen blue (MB) and methyl violet (MV). The isolated complex: calix[4]resorcinarene 1-dye were characterized by Fourier transform infrared spectroscopy, Fluorescence spectroscopy, PDRX and Differential scanning calorimetric analysis. The dye adsorption experiments were carried out from an aqueous solution in a batch reactor. The effect of several parameters has been determined to obtain the best experimental conditions. The equilibrium adsorption data were interpreted using Langmuir and Freundlich isotherms models (best correlation: R2 > 0.997). The calculated maximum adsorption capacity (qmax) for the RB at 25 °C were 29.49 mg/g at pH=8.3. The mechanism of adsorption onto the calix[4]resorcinarene is considered to be due to a host-guest interaction between the dye and azo-calix[4]resorcinarene molecular cavity. The results showed that calix[4]resorcinarene (1) can be considered as potential adsorbents for basic dye from dilute aqueous solutionItem The removal of phenol from synthetic wastewater using Calix[4]resorcinarene derivative based polymer inclusion membrane(2016) Benosmane, Nadjib; Boutemeurb, B.; Hamdi, Safouane.M.; Hamdi, MaamarIn the present study, the removal of phenol from synthetic wastewater across polymer inclusion membrane (PIM) containing calix[4]resorcinarene derivative used as a carrier were investigated. Phenol removal showing high efficiency when transported through PIMs prepared from cellulose triacetate (CTA) as a polymeric support material and 2-NPOE as a plasticizer. The effects of membrane composition, type of plasticizer, carrier content, pH phase’s solution, and membrane stability, were examined in the facilitated transport experiments of phenol across PIM. A PIM containing 0.1 g CTA, 0.15g/g CTA of carrier and 1.5 g/g CTA of NPOE, provided the highest percentage of phenol over 5 days of transport, the feed solution in these transport experiments was at pH 2, while the stripping solution contained 0.25M NaOH. The prepared PIM were characterized by using Fourier transform Infra Red (FTIR), XRD and Thermo gravimetric analysis (TGA) techniquesItem Solvatochromic fluorescence characteristics of cinnamoyl pyrone derivatives(Elsevier, 2017) Benosmane, Nadjib; Boutemeurb, Baya; Hamdi, Safouane M.; Hamdi, Maamar; Artur S.M., SilvadThe solvatochromic fluorescence behavior of cinnamoyl pyrone derivatives has been studied in several polar and non-polar solvents. The fluorescence spectra of these compounds exhibit red shift from its absorption spectra and present an excellent correlation with solvent polarity. Cinnamoyl pyrones show a significant spectral shift in fluorescence emission as a function of water composition in binary aqueous solutions mixture. This change is due to the specific intermolecular hydrogen bonding of cinnamoyl pyrones with a molecules of water, due to the deactivation of the lowest excited singlet state of these compounds. The relative quantum yields are calculated. It is found that the quantum yields of the cinnamoyl pyrones vary with the change in the solvent polarity indicating the dependency of fluorescence properties on the solvent nature. It has been observed that the addition of water and pH medium can affect the fluorescence properties of cinnamoyl pyrones in ethanol. This study exhibited that due to the solvent sensitive emission, cinnamoyl pyrone derivatives are a good compound to be used as fluorescence probesItem Study of the novel fluorescent 4-methyl-9-(3-oxobutanoyl)-2H,8H-pyrano[2,3-f]chromene-2,8-dione derivative. estimation of the ground- and excited-state dipole moments from a solvatochromic shift(Elsevier, 2017) Al-Kawkabani, Ahmed; Makhloufi-Chebli, Malika; Benosmane, Nadjib; Boutemeur-Kheddis, Baya; Hamdi, Maamar; Silva, Artur M.S.