NU Research Week - I

Permanent URI for this collection

https://testres.nu.edu.kz/handle/123456789/410

Browse

Browsing NU Research Week - I by Author "Aitbekova, A."

Now showing 1 - 3 of 3
  • Thumbnail Image
    ItemOpen Access
    A case study: municipal waste management in Astana, Kazakhstan (A guideline of waste management for developing countries)
    (Nazarbayev University, 2013) Kim, J.R.; Inglezakis, V.; Rojas-Solorzano, L.; Ismailova, A.; Aitbekova, A.; Shorakyzy, G.; Kystauova, A.
    This research is currently ongoing and as a preliminary result, it is noticed the need of: increasing proportion of recycling in the waste management system, constructing incineration plants in the city, improving waste collection with the involvement of private companies, and introducing volume-based charging system.
  • Thumbnail Image
    ItemOpen Access
    Development of nanohybrid material for antibiotics removal and degradation
    (Nazarbayev University, 2013) Toropov, A.; Aitbekova, A.; Babaa, M-R.; Mikhalovsky, S. V.
    This project is about a technique to accelerate the degradation of antibiotics (for example Doxycycline) using a severe confined environment and a physical agent. The confining medium is carbon nanotubes (CNTs) because of their low internal diameter (of the order of 1 to 10 nanometers), high physicochemical stability, high mechanical strength, and presence of strong intermolecular forces at their inner surface that contribute to the degradation effect. This new technique will find a niche in pharmaceutical industries where many processes are not sufficiently clean to eliminate a significant amount of antibiotic residues from waste streams.
  • Thumbnail Image
    ItemOpen Access
    Production of humic substances from Zaysan brown coal
    (Nazarbayev University, 2013) Aitbekova, A.; Sharafudinov, A.; Tantybayeva, B.
    In this research project, humic acids were obtained from activated coal samples by hydroxide and pyrophosphate methods. Activation was done using hydrochloric (HCl) and sulfuric (H2SO4) acids. Quantitative analysis shows that the optimal conditions that give the maximum yield of humic acids are activation by sulfuric acid with 1:8 ratio of solid to liquid phases, temperature of 40°C and extraction by pyrophosphate method. Coal samples were prepared according to the state standard 10742-71. The coal samples were activated by HCl and H2SO4 with solid to liquid ratio of 1:5, 1:8, and 1:10. The activation stage was performed at 25°C and 40°C. After the activation stage humic acids were extracted by hydroxide and pyrophosphate methods according to the state standard 9517-94.