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Now showing 1 - 5 of 15

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استخلاص الكركمين من نبات الكركم وتحضير بلوراته النانوية ودراسة خصائصه الفيزيائية والكيميائية
(University of Eloued جامعة الوادي, 2026) شيخة ,إسراء; خامسة أسماء
This work is based on turmeric (Curcuma longa ), a plant belonging to the Zingiberaceae family that has been widely used for centuries in traditional medicine due to its remarkable therapeutic properties. In this study, curcumin, the principal bioactive compound of turmeric, was extracted using an ultrasonicassisted extraction technique, achieving an extraction yield of 11.06%. Curcumin nanocrystals were subsequently prepared and their physicochemical properties were investigated using various analytical techniques. Fourier Transform Infrared Spectroscopy (FTIR) was employed to identify the functional groups present in the samples. Ultraviolet–Visible (UV–Vis) spectroscopy revealed a characteristic absorption maximum at 459.92 nm. X-ray Diffraction (XRD) analysis demonstrated a crystallinity index of 75% and a crystallite size of 3.35 nm, confirming the nanocrystalline nature of the prepared curcumin crystals. High-Performance Liquid Chromatography (HPLC) was also used to evaluate the purity and chemical composition of the samples.
.إنتاج هلام حيوي من قشور الخضر والفواكه وتقييم خصائصه للتطبيقات البيئية
(University of Eloued جامعة الوادي, 2026) كيرد ,شيماء; ربوح ,ردينة
This study focused on the valorization of fruit and vegetable waste through the preparation of biogels and the evaluation of their chemical properties, as well as the decolorization of aqueous solutions. Agricultural waste, such as fruit and vegetable peels, was chosen as a renewable and environmentally friendly raw material due to its richness in natural biopolymers. The prepared biogels were characterized using Fourier transform infrared spectroscopy (FTIR) to identify the main functional groups involved in gel formation and adsorption mechanisms. FTIR analysis confirmed the presence of hydroxyl, carboxyl, and carbonyl groups. The adsorption performance of the synthesized biogels was investigated using methylene blue dye as a typical contaminant. The results showed a gradual decrease in adsorption values and a corresponding increase in removal efficiency with increasing contact time. The adsorption capacities varied among different samples depending on the chemical composition and structural properties of the original biomass. Some samples exhibited higher removal efficiency due to their increased porosity and abundance of active adsorption sites. The results of this study demonstrate the feasibility of efficiently converting fruit and vegetable waste into biodegradable, low-cost biogels with promising potential for wastewater treatment applications. This approach contributes to sustainable waste management, environmental protection, and the development of eco-friendly materials within the framework of sustainable development and environmentally conscious countries.
تصنيع جسيمات النانوية بواسطة نبات السدر وقشور البيض
(University of Eloued جامعة الوادي, 2026) "مصباحي أيمن نصيره حسين"; "مصباحي أيمن نصيره حسين"
Green manufacturing of nanoparticles is considered one of the most important sustainable trends in nanotechnology, as it is based on natural and environmentally friendly sources instead of chemicals. In this work, calcium oxide nanoparticles (CaO NPs) were manufactured from eggshells by thermal calcination at a temperature of 700 °C, which changes the main calcium carbonate (CaCO₃) in the shell to pure CaO. Zinc oxide nanoparticles (ZnO NPs) were also manufactured using the aqueous extract of the jujube plant (Ziziphus lotus) as a reducing agent and green stabilizing agent. All prepared nanoparticles were characterized using spectroscopic techniques: UV-Vis spectroscopy, FTIR spectroscopy, and X-ray diffraction (XRD). The zinc oxide nanoparticles showed a size of 19 nm and 20 nm for calcium oxide. This work highlights the importance of recycling waste and using plants in the production of effective and sustainable nanomaterials, which is consistent with the Sustainable Development Goals
.إزالـة تلوث المياه باستخدام قشور الرمان المعالجة كيميائيا
(University of Eloued جامعة الوادي, 2026) خباز,بشرى; مسعي محمد ,سمية
This dissertation aims to investigate the removal of water pollution caused by Methylene Blue using one of the agricultural wastes, namely pomegranate peels, after their chemical treatment with sodium hydroxide to produce an adsorbent material. The study relied on the adsorption technique due to its effectiveness and simplicity in wastewater treatment. The work included the preparation and characterization of the adsorbent material using several analytical techniques, followed by the investigation of the effects of experimental parameters on the adsorption process, including pH, contact time, and the initial dye concentration. The obtained results revealed that chemically treated pomegranate peels exhibited a good adsorption capacity toward the dye. The experimental data were analyzed using adsorption kinetic models and isotherm studies. The adsorption kinetics were found to fit well with the pseudo-second-order model, while the adsorption isotherm was best described by the Freundlich model. Furthermore, the Langmuir model estimated a maximum adsorption capacity of 87.71 mg/g. This study therefore confirms the potential valorization of pomegranate peels in the treatment of water pollution through economical and environmentally friendly methods
.معالجة المياه بالالكتروكوقيليشن: دراسة كهروكيميائية
(University of Eloued جامعة الوادي, 2026) هيبة ,الرحمان; قدار, هديل
Cette étude vise à évaluer l'efficacité de la technique d'électrocoagulation pour le traitement des eaux contaminées par le colorant bleu de méthylène (BM) à l'aide d'électrodes en aluminium (Al). Les résultats expérimentaux ont démontré que les paramètres opératoires, notamment l'intensité du courant électrique, le temps de traitement, le pH et la nature de l'électrolyte, influencent de manière significative l'efficacité du traitement. Le rendement d'élimination a atteint 97 % pour le chlorure de sodium (NaCl), contre 88 % pour le sulfate de sodium (Na₂SO₄), ce qui s'explique par la conductivité électrique plus élevée des ions chlorure et leur rôle dans la promotion de la dissolution anodique de l'aluminium. En conclusion, cette étude démontre que l'électrocoagulation constitue une technique efficace et écologiquement durable pour le traitement des eaux industrielles contaminées par les colorants