Natural radioactive elements and heavy metals in coal, fly ash and bottom ash from a thermal power plant

1993 ◽  
Vol 28 (9) ◽  
pp. 2061-2073 ◽  
Author(s):  
J. Font ◽  
M. Casas ◽  
R. Forteza ◽  
V. Cerda ◽  
F. Garcias
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Coal Fly Ash ◽  
Thermal Power ◽  
Bottom Ash ◽  
Radioactive Elements

scholarly journals Leaching characteristics of wastes from Kemerkoy (Mugla-Turkey) power plant

2013 ◽  
Vol 2 (1) ◽  
pp. 51-57
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Extraction Procedure ◽  
Bottom Ash ◽  
Coal Ash ◽  
Toxicity Tests ◽  
Western Coast ◽  
Ash Disposal

A main problem related to coal ash disposal is the heavy metal content of the residue. In this regard, experimental results of numerous studies have indicated that toxic trace metals may leach when fly ash and bottom ash contacts with water. In this study, fly ash and bottom ash samples obtained from Kemerköy thermal power plant, located on the south-western coast of Turkey, were subjected to toxicity tests such as the extraction procedures (EP) and toxicity characteristic leaching procedures (TCLP) of the U.S. Environmental Protection Agency (U.S. EPA), the so-called Method A extraction procedure of the American Society of Testing and Material (ASTM). When Pb and Cd concentrations, analysed according to EP and TCLP, were considered, Kemerköy fly and bottom ash can be classified as a hazardous waste under the principles of the Federal Resource Conservation and Recovery Act (RCRA). Based on the geochemical analyses carried out, it was also determined that several toxic trace elements, such as Pb, Zn, Cd, Cu and Co were enriched at the fly and bottom ash of Kemerköy thermal power plant.

scholarly journals Evaluation of Zeolitic Materials Synthetized from Coal Fly Ash as Potential Cd(II) Adsorbents from Aqueous Solutions

2020 ◽  
Vol 71 (9) ◽  
pp. 125-142
Author(s):  
Claudia Maria Simonescu ◽  
Alina Melinescu ◽  
Culita Daniela Cristina ◽  
Dhuha Hasan ◽  
Bianca Zarnescu ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Specific Surface ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Coal Fly Ash ◽  
Thermal Power ◽  
Order Kinetic ◽  
Simple Method ◽  
Cadmium Ions

The aim of this research paper is to present a simple and efficient method to prepare zeolite materials from thermal power plant fly ash which is one of the most important waste resulted from power plants. The method of preparation of zeolite materials consists of alkaline activation followed by calcination at different temperatures. The zeolite materials prepared were studied by FT-IR spectroscopy, specific surface determination, X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM) and particle size composition. XRF data indicated that the zeolites synthesized are characterized by Si/Al ratio between 1.21 and 1.26, being mainly composed of Na-P1 zeolite. The optimum conditions of cadmium ions removal process by adsorption onto zeolite materials have been determined. It was concluded that increase of calcination temperature has as result increase of specific surface area and cosequently the increase of sorption capacity. An equilibrium, kinetic and thermodynamic study has been performed. The high value of correlation coefficient for the Langmuir isotherm reveals that the Cd(II) sorption onto zeolite materials occurs as a monolayer coverage of Cd(II) ions on homogenous zeolite surface. The pseudo-second-order kinetic model fits the experimental results of the Cd(II) sorption onto zeolite materials processes. As a results, the mechanism involved in Cd(II) sorption onto zeolite materials is based on chemical reactions. The thermodynamic results indicate that the Cd(II) adsorption process is more encouraging at higher temperatures.The results established that valuable NaP1 zeolite materials with high adsorption capacity can be prepared from thermal power plant fly ash through a simple method. The materials prepared can be utilized to remediate cadmium ions-bearing wastewater.

scholarly journals Heavy Metal Accumulation by Plant Species at Fly-Ash Dumpsites: Thermal Power Plant, Gandhinagar, Gujarat

2019 ◽  
Vol 5 (02) ◽  
pp. 111-116
Author(s):  
Bhawana Pathak ◽  
Krishna Rawat ◽  
M. H. Fulekar
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Power Plant ◽  
Plant Species ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Translocation Factor ◽  
Heavy Metal Accumulation ◽  
Wild Plant ◽  
Weed Species

Naturally growing wild plant species were identified for accumulation of heavy metals at fly ash different disposal sites of Thermal Power Plant Gandhinagar. Cd, Fe, Zn, Cu, Ni, Pb and Cr metals were selected for studying accumulation by indigenous plants. Nine major weed species growing dominantly at fly ash dumpsite were identified i.e. Prosopis juliflora, Ipomea carnea, Calotropis procana, Nerium indicum, Abutilon indicum, Tephrosia purpunea, Cassia tora, Parthenium hysterphorus, Jatropha gossypifolia. Results showed significant accumulation of fly ash heavy metals by indigenous identified plants positive pattern of accumulation differed significantly in different weed species. Roots showed higher accumulation of heavy metals as compared with shoot in most of the plants but in some shoots also showed more accumulation compared to roots. Both translocation factor and bioaccumulation factor was calculated to determine metal translocation from site to roots and from root to shoot. Current results suggest that these plants species can effectively survive in harsh environment and can be used for eco-restoration purpose and also they can be used as potential phytoremediation species.

scholarly journals Wavelength Dispersive XRF Study of Heavy Elements in Soil in Cancer Hit Villages of Malwa Region of Punjab, India

2019 ◽  
Vol 35 (3) ◽  
pp. 1045-1053
Author(s):  
Kirandeep Kaur ◽  
Manmohan Singh ◽  
H. S. Sahota
Keyword(s):  
Heavy Metals ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Heavy Elements ◽  
Fluorescence Technique ◽  
Radioactive Elements ◽  
X Ray ◽  
Low Level ◽  
Radioactive Substances

Heavy metals in the soil of 13 villages of Bathinda district, Punjab, India, were measured using wavelength dispersion X-ray fluorescence technique (WDXRF). 29 elements for which these samples were analyzed are U, Th , 40K, Pb, La, Ba, Cs, Ce,, Sn, Sb, As, Cr, Zn, Cu, Co, Sr, Zr, Sc, V, Ni, Rb, Mo,Ga, Nb, Y, Fe2O3, CaO, MnO and TiO2 . Radioactive substances like U and Th are quite low. Alkaline elements like Ca, Ba, Sr are quite high and may be acting as catalysts to low level radioactive elements. As, Fe, Co, Ni, Zr, Cr, Zn too are probably due to proximity of a thermal power plant at Bathinda and use of pesticides and fungicides for plantation.

Extraction of Aluminum Hydroxide from Coal Fly Ash by Pre-Desilication and Calcination Methods

2011 ◽  
Vol 396-398 ◽  
pp. 706-710 ◽  
Author(s):  
Ming Wei Wang ◽  
Jing Yang ◽  
Hong Wen Ma ◽  
Jie Shen ◽  
Jin Hong Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Fly Ash ◽  
Power Plant ◽  
Dissolution Rate ◽  
Aluminum Hydroxide ◽  
Thermal Power Plant ◽  
Glass Phase ◽  
Coal Fly Ash ◽  
Thermal Power ◽  
Raw Material

Using coal fly ash from one thermal power plant in Ningxia, China as the raw material, aluminum hydroxide powder was successfully extracted by pre-desilication , calcination, dissolution and carbonation precipitation processes. The research results indicated that the mullite, Quartz and glass phase in the coal fly ash could be changed into NaSiO3, NaAlO2 and Na2CaSiO4 after the coal fly ash was treated by desilication and calcination. The SiO2and Al2O3 components in the coal fly ash were mainly separated by dissolving the calcined sample using water. The dissolution rate of Al2O3 from the calcined sample is 91%. The aluminum hydroxide powder extracted from the coal fly ash is bayerite with the particle size of more than 50m. The extraction rate of the aluminum hydroxide from the coal fly ash can be up to 83%.

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