Browsing by Author "Nahla Naji Hilal"

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    Possibility of Adding Biomedical Waste Plastic as Asphalt Performance Improvers
    (AIP Conf. Proc. 3303, 040006, 2025-03-31) Nahla Naji Hilal; Khalid Awadh Mohammed; Sattar A. Mutlag; Alaa Dahamm Mamdooh
    There are many types of human waste, including biomedical waste plastic, which is infectious and toxic, and its disposal is one of the main problems facing developing countries. In the process, countries must establish an extensive network of roads to maintain a stable economic and social environment. Research has shown that bitumen limitations necessitate careful consideration when building highways and transportation networks for development. It is possible to use biomedical plastic waste in road construction, reducing its environmental impact. It is considered economical and capable of improving the performance and characteristics of paved roads. The research aims to investigate the impact of biomedical waste plastic on the rheological characterization of bitumen, utilizing safer insulin syringes after treatment. Using mixing techniques, we prepared the modified bitumen from the waste. We added it gradually after heating the asphalt and waste. Researchers found that adding it could improve the bitumen's rheological properties, like its low penetration, flash point, fire point, and ductility, while still meeting the requirements for asphalt and having a high softening point and viscosity. In general, the results showed that increasing the content of biomedical waste as a percentage of the weight of bitumen improves the rheological properties of bitumen and paving performance. This also reduces the effect of cracking and improves the susceptibility temperature of asphalt. The results also demonstrated a 9.75% material cost reduction. This approach not only allows for the prudent disposal of hazardous biomedical plastic waste, but also reduces construction costs by saving some bitumen, making this type of asphalt more suitable for use in hot areas.
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    Study of effective removal of nickel and cobalt from aqueous solutions by FeO@mSiO2 nanocomposite
    (Elsevier, 2024-08-15) Nahla Naji Hilal; Wahran M. Saod; Nisreen Jassam Alaallah; Ekhlas A. Abdulkareem; Mohammad I. AlBiajawi
    In many regions of the world, water pollution from potentially harmful substances like nickel (II) and cobalt (II) ions is a recurring issue. The quality of rivers and lakes’ environments, wastewater discharge, and drinking water sources are all still significantly impacted by it. Many studies are focused on developing new treatment alterna tives since, although treatment is often necessary, it is not always possible or accessible in a particular setting. Nanotechnology provides significant potential for water treatment. Although it has been demonstrated that nanomaterials may effectively remove both different type from chemical pollutants—including organic and inor ganic—from contaminated source, their removal efficacy may be diminished by their propensity to flocculate. Iron oxide loaded with mesoporous silica (FeO@mSiO2) was effectively synthesized and characterized through the use of FTIR, SEM, TGA, XRD, and UV–visible spectral analysis. Tests and evaluations were conducted to de termine FeO@mSiO2 nanocomposite ability to remove nickel (II) and cobalt (II) from solution, and the ideal re moval conditions were determined at different condition Adsorption isotherms, Freundlich and Temkin isotherms to the data. FeO@mSiO2 composite material displayed significant efficacy in the removal of Ni and Co. The best removal rates were attained at pH 7 and 180-minute contact duration.