مجلة الدراسات العليا

Permanent URI for this communityhttps://repository.neelain.edu.sd/handle/123456789/1519

Browse

Has files: YesSubject: search.filters.subject.FTIR

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Determination of WAD - Cyanide complexes in Soil Samples from Tuti Island, using FT-IR Spectroscopy
    (Graduate College - Alneelain university, 2017-12) Gobran A; Siddig T. Kafi, Hago A
    The current study was performed to determine the WAD (Weak – Acid- dissociable) cyanide complexes in the various sites around Tuti Island bank in the center of Khartoum State, Sudan. Fourteen soil samples collected and analyzed by FT-IR spectroscopy. The spectra of these samples detected some functional groups such as O-H, N-H, C=O, C≡N. Qualitative analysis helped in assessing cyanide complexes and related cyanide compounds ( i.e. cyanates and thiocyanates ) in the samples under test. Results showed that, thiocyanate and cyanate combined with some metals like KOCN, NaSCN, KSCN existed in the area. WAD cyanides appeared at majority of samples.Presence of cyanide complexes in the sediments may produce adverse effects on the ecological system and toxicity to human health because of its ability to dissolved under effects of ample factors as (pH, cyanide species and their relative concentrations), and release free cyanide; free cyanide is very toxic. Also, heavy metals such as Cu, Hg, Au and Agare found in the samples. These metals which are produced from process decomposing of cyanide complexes can accumulate in the soil and lead to long – term negative effects on the ecosystem in high enough concentration.
  • Thumbnail Image
    Item
    Structural, Optical and Electrical properties of Novocrete Material
    (جامعة النيلين, 2008) Ibrahim A. Sulieman; Mohammed A. Siddig; Abdelrahman A. Elbadawi
    From the material science importance in many life fields; the Novocrete material which plays a significance part at buildings and roads becomes a new material that wasn't studied before. The results showed that the Novocrete poses a poly crystalline structure exactly orthorhombic with (Pnma) space group and lattice parameters a = 7.667, b = 4.799 and c = 9.002 Ao respectively. The optical properties that have been examined by both Fourier Transform Infra Red FTIR and Ultra Violet UV showed the bonds and energy band gap; the energy gap value and the multi bonds indicate that the material is insulator and the impedance spectroscopy results confirm the behavior. For environmental issue the material can be classified as an environment friend, the reason is coming from the Novocrete material elements. Key Words: Novocrete, FTIR, UV, XRD, SEM