Department of Environmental Engineering;
School of Civil Engineering and Architecture;
MUST;
Ulaanbaatar;
Mongolia;
Department of Physics;
School of Applied Sciences;
MUST;
Ulaanbaatar;
Mongolia;
Pavlodar State University;
Pavlodar;
Republic of Kazakhstan;
Fly; Ash; Ferrospheres; Quartz; Albite; Anorthite; Hematite;