CEST Proceedings are published under the ISSN 2944-9820.
Conversion of coal fly ash by-products into high-grade zeolite by a quasi natural crystallization process
Zgureva D., (Corresponding) Boycheva S.
Topic:
Hazardous waste management
Recently, the synthesis of zeolites from coal fly ash (FA) has been extensively studied regarding the process optimization, industrial upscaling and technological commercialization. The obtaining of fly ash zeolites (FAZ) is based on the transformation of aluminosilicates of FA by alkaline...Read more
Coal fly ash zeolites as adsorbents for effective removal of heavy metals and dyes from contaminated waters
Zgureva D., (Corresponding) Boycheva S., Behunová D., Václavíková M.
Topic:
Wastewater treatment
Recently, the purification of enormous amounts contaminated industrial, agricultural and municipal waters increases the demands of low-cost and technologically feasible techniques. The application of natural zeolites in wastewater treatment is known from many years. A feasible approach for...Read more
Keywords:
Waste water treatment, Fly ash zeolites, Heavy metals, Dyes, Adsorption
Magnetite nanoparticles activated coal fly ash zeolites with application in waste water remediation
(Corresponding) Boycheva S., Miteva S., Trendafilova I., Zgureva D., Václavíková M., Popova M.
Topic:
Wastewater treatment
The application of zeolites in wastewater treatment is studied long ago but still many unexploited opportunities exist. Recent investigations on natural and synthetic zeolites in water decontamination are focused on the improvement of their adsorption and ion-exchange properties modifying them by...Read more
Keywords:
Waste water treatment, Magnetic zeolites, Fly ash zeolites, Magnetite nanoparticles
Cobalt- and copper-modified coal fly ash nanozeolites for environmental protection applications
(Corresponding) Boycheva S., Marinov I., Lazarova H., Zgureva D., Václavíková M., Popova M.
Topic:
Nanomaterials in the environmnents applications and effects
Fly ash zeolites (FAZ) are promising materials for adsorbents, ion-exchangers and catalysts. FAZ usually possess a mixed micro-mesoporous structure that facilitates mass transport phenomena through their framework. Due to the transfer of iron spinel oxides and many metal species from the raw...Read more
Studies on the CO2 adsorption mechanism of Na-X and Na-Ca-X coal fly ash zeolites
(Corresponding) Boycheva S., Lazarova H., Zgureva D., Popova M.
Topic:
Climate change mitigation and adaptation
Coal fly ash zeolites (CFAZ) of Na-X and Na-Ca-X types were synthesized using as raw materials fly ashes generated by the combustion of lignite from various deposits with low and medium limestone content. It has been found that CFAZs with higher calcium content superior those containing less...Read more
Studies on the CO2 adsorption onto coal fly ash zeolites at elevated pressures
(Corresponding) Boycheva S., Zgureva D.
Topic:
Climate change mitigation and adaptation
Coal fly ash zeolites (CFAZs) of Na-X type were prepared by ultrasonic-assisted double stage fusion-hydrothermal synthesis from lignite coal fly ash at two different fusion temperatures 550 and 800 C. The detailed surface analyses were performed experimentally using N2 physisorption technique and...Read more
Performance evaluation of flue gas cured calcium rich fly ash based building blocks
(Corresponding) Usta M., Adegbile M., Gregor A., Paaver P., Hain T., Yoruk C., Uibu M., Trikkel A.
Topic:
Mineral carbonation of alkaline waste materials
This work focuses on the local alkaline wastes of Estonia where different waste streams were studied for the performance testing of the fly ash based building blocks. Fly ash from oil shale direct combustion and wood fly ash from district heating plant were considered in the applications for...Read more
Keywords:
Fly ash, accelerated carbonation, CO2 mineralization
Contribution to low-carbon building industry and improved durability through incorporation of waste into cement composites
Estokova A., (Corresponding) Figmig R., (Corresponding) Singovszka E.
Topic:
Solid waste management
By using mineral waste in the production of cement composites, it is possible not only to reduce greenhouse gas emissions and carbon footprint, but by adding secondary waste such as fly ash, silica fume or slag, some properties of the resulting composites are also improved. The waste mentioned are...Read more
