– Iron oxide nanoparticles (IONPs) can play a significant role in the removal of heavy metal from contaminated solution .Aresnite ,As(III) highly toxic,mobile and predominant species in arsenic contaminated water IONPs have been synthesized, characterized and tested for the removal of As(III) from arsenic contaminated water. In this work , we synthesized IONPs using a chemical method involving dispersion of Fe3+ ions through polymer molecules of poly vinyl alcohol (PVA) in aqueous medium X-ray diffraction (XRD) analysis confirmed the formation of a single phase rhomobohrdral crystal structure, the size of nanoparticles was 50-100 nm. Transmission electron microscopic images corborate the result of IONPs (50-100 nm) . The adsorption of As(III),Hg(II) and Cd(II) On (IONPs) was studied using four parameters contact time, concentration, dose of IONPs and pH Adsorption equilibrium was achieved in 100 min and maximum removal of As(III) was obtained at pH (6-6.5) . The isotherm analysis indicated that the adsorption data better filted to the Langmuir isotherm model. The maximum adsorption capacities were 101.2, 73.10 and 60.05 mg g_1 for As(III), Hg(II) and Cd(II), respectively.
ezuldeen mohammed abraheem aboushalloua(9-2021)

This study was conducted to estimate the concentration of potassium bromate (KBrO3) in 21 samples of pastries and biscuits, and the absorption of samples was measured using a (Uv-Vis spectrophotometer). The results of this research showed that the amount of potassium bromate in the samples varies according to the sample, and the highest concentration was for the sample of Major Biscuits(567.5ppm). The lowest concentration was for 44 ppm mleeha cake sample. We conclude the use of an internationally banned carcinogen and prohibited by Libyan laws, as this study revealed the presence of high concentrations of it in the tested samples.
ABUBAKER A BASHIR ATRROG(12-2021)

ABSTRACT The physical and chemical properties of ground water from thirty wells in Sug al Juma’a area in Tripoli, Libya were analyzed using standard methods. Ground water samples were collected from three locations (Al-Shat Road (A), Sug al Juma’a Road (B) and Arada Road (C)). The physical and chemical parameters such as pH, Total Dissolved Solids (TDS), Total Hardness (TH), Electrical Conductivity (EC), Calcium (Ca2+), Magnesium (Mg2+), Sodium (Na+), Potassium (K+), Chloride (Cl-), Sulfate (SO4 2-), Bicarbonate (HCO3 -), Nitrate (NO3 -) were analyzed to study the present status of the ground water quality. The results were compared to the Libyan Standard No. 82 for Drinking Water and the World Health Organization (WHO). The understudy samples showed significantly higher values of TDS and EC than Libyan Standard and WHO. Permissible limits which may greatly influence the health conditions of the residents of this area. It is concluded from this study that the ground water of the area needs a substantial degree of purification treatment before using for drinking and domestic purposes. arabic 8 English 56
Aburawi Elgornazi, Ali Bukhzam, Nessma Alshelmani, Nabil Bader(1-2021)