Alexandra Kamusheva

Bulgarian Academy of Sciences | BAS · Rostislav Kaishev Institute of Physical Chemistry

GREEN CHEMISTRY IN THE SCHOOL LABORATORY Abstract. Despite the great contribution of chemistry, its negative image in society is a serious problem. Green Chemistry (or Sustainable Chemistry) addresses the efficient use of raw materials and waste management and issues related to health, safety and the environment. It offers the opportunity to put...

Despite the great contribution of chemistry, its negative image in society is a serious problem. Green Chemistry (or Sustainable Chemistry) addresses the efficient use of raw materials and waste management and issues related to health, safety and the environment. It offers the opportunity to put ideas of sustainability into school practice. Thi...

Abstract. Glass-ceramics are polycrystalline materials, containing amorphous and crystal phases and obtained by controlled crystallization of glasses with suitable compositions. The parent batch is melted, the melt is formed and thus prepared samples partially crystallize at secondary heat-treatment. The crystallization process can be controlled by...

Hazardous electro-furnace slag (EFS), dust (D) and converter slag (CS) from ferronickel smelting plant were mixed with glass cullet and vitrified. The optimal heat-treatment regime for transformation of obtained glass into glass-ceramic was evaluated using fast alternative methods: the nucleation step was estimated by DTA analysis, while the crysta...

A glass, based on Electric Arc Furnace Slag (EAFS), is studied to produce a glass-ceramic with bulk crystallization. The main kinetics parameters are investigated by non-isothermal DTA, the formed crystal phases are evaluated with the application of XRD, while the microstructure is observed by SEM. The variations of density and porosity accompanyin...

This paper is concerned with environmental effects of the vitrification process of solid metallurgical waste (filter dust, FD, slag from electro-furnace, SEF and slag from converter, SC) from ferronickel production industry. Chemical and mineralogical characterization of the waste materials was done. The waste mixture (FD : SEF : SC = 1 : 10 : 1) c...

The present study seeks a relationship between learning in the Faculty of Chemistry at Sofia University and the career development of the graduates. For this purpose an online-based survey of 100 students was conducted. The students graduated with Bachelor or Master Degrees over the past five years (2006 - 2010). The inquiry was concerned with the...