أ. خالدحريبة

قسم الكيمياء كلية التربية - طرابلس

الاسم الكامل

أ. خالد الصغير عمر حريبة

المؤهل العلمي

ماجستير

الدرجة العلمية

محاضر

ملخص

معلومات الاتصال

روابط التواصل

الإستشهادات

الكل منذ 2017
الإستشهادات
h-index
i10-index

المؤهلات

ماجستير

كيمياء حيوية
جامعة بلغراد - صربيا
1 ,2008

بكالوريوس

كيمياء
جامعة طرابلس
1 ,2000

المنشورات

Production of Biodiesel From Waste Cooking Oil

The use of waste cooking oil for biodiesel synthesis reduces the cost of raw materials. After studying the appropriate conditions for biodiesel production in terms of the ratio of waste oil to methanol, the effect of reaction temperature, and the effect of reaction time by conducting a transesterification reaction with 1.0 %w/v sodium hydroxide as a catalyst. It was found from the analysis that the best ratio for biodiesel production is 1:3 ratio of waste oil to methanol, the best reaction temperature is at 60oC, and the best stirring time for the reaction mixture is 40 minutes. A large amount of biodiesel was prepared by applying the best conditions required to obtain the highest yield of the biodiesel, which was equal to 87.19% w/w after a five times wet washing process by 30 mL of distilled water. It was also found that the acid equivalent of biodiesel was 2.53 mg KOH /g, and biodiesel density ranged from 0.80 to 0.843 g / mL. The study proved that the biodiesel production process using waste cooking oil is technically feasible and inexpensive.
Khaled Asagheer O Hreeba(1-2022)
Publisher's website


تقييم جودة مصادر المياه الجوفية في مدينة جنزور - ليبيا

In this study the quality of ground water in the city of Janzour ± Libya was studied. 27 samples of well water were collected with depths ranging between 18 - 160 m covered most areas in the city and some of their chemical properties including pH, electrical conductivity, total dissolved salts, and the concentration of nitrate, sulfate, sodium, potassium and calcium ions were determined and compared with the Libyan National Center for Standardization and Metrology. The results showed that the most samples did not exceed the maximum limit according to Libyan and world standard except W6 (Alirifi Asharif school) and W10 (Abd Aljalil Alirifi farm) which have high concentration of Sodium (200mg/l). Also noted that the amount of total dissolved salts is 50% of the samples were less than 100 mg/l which is the minimum amount according to the Libyan sta ndard.
خالد الصغير عمر حريبة(1-2018)
موقع المنشور


Electrochemical Synthesis, and Electrochromic Properties of Poly(2-(9H-Carbazol-9-yl)acetic acid) Film

A poly(2-(9H-carbazol-9-yl) acetic acid) thin-film was formed on the surface of a platinum (Pt) electrode by oxidative electropolymerization of a new carbazole derivative. Electrochemical polymerization was performed in reaction medium containing monomer and 0.1 M TBABF4 mixture in acetonitrile (ACN) using repeated cycling at a scanning rate of 250 mV. The electrochemical polymerization of 2-(9H-carbazol-9-yl) acetic acid (25mM) was studied using cyclic voltammetry on both Pt and ITO electrodes. The structure of the soluble polymer was elucidated by nuclear magnetic resonance (1H and 13CNMR) and Fourier transform infrared (FTIR) spectroscopy. The weight average molecular weight of poly(2-(9H-carbazol-9-yl) acetic acid) was determined using gel permeation chromatography (GPC) and found to be 130900 g/mol. Characterizations of the resulting polymer were performed by cyclic voltammetry, dry conductivity measurement and scanning electron microscopy (SEM), while the UV-Visible spectroscopy and electrochemical spectroscopic studies indicated that the poly(2-(9H-carbazol-9-yl) acetic acid) film showed a green color in the oxidized state, and high transmittance in the neutral state. Moreover, the poly(2-(9H-carbazol-9-yl) acetic acid) film is soluble in common organic solvents, such as DMSO, THF, NMP, and DMAC. The conductivities of poly(2-(9H-carbazol-9-yl) acetic acid) is about 4.3x 10-2 S/cm
Khaled Asagheer O Hreeba(12-2021)
Publisher's website