Heavy metal characterization of CFB-derived coal fly ash

Koukouzas, Nikolaos; Ketikidis, Chrisovalantis; Itskos, Grigorios

doi:10.1016/j.fuproc.2010.10.007

Cited by 103 publications

(54 citation statements)

References 23 publications

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“…However, different trace element concentrations were detected in the leachates of TCLP tests compared to the same studies [17,33]. This is most probably due to the difference between the presented final pH values in this paper and the final pH values reported by the researchers [17,33], which are 13 and 5 respectively.…”

Section: Results Of the Toxicity Test Procedurescontrasting

confidence: 60%

“…As it was stated by Koukouzas [33], solubility of some trace elements may significantly change depending on the pH of the solution. For this reason, pH variations should be monitored during toxicity test procedures, and the final pH values should be taken into consideration in the evaluation of the test results.…”

Section: Results Of the Toxicity Test Proceduresmentioning

confidence: 88%

“…CaO was found as the major component in the ash sample which was mostly originated from calcite in feed coal. As it was stated by Koukouzas et al, total and free CaO are mostly generated through the thermal disruption of CaCO 3 [33]. As seen from Table 2, the sample contains significant amount of silicon, aluminum and iron elements due to the presence of clay minerals in feed coal.…”

Section: Physical and Chemical Characterization Of Fly Ash Samplementioning

confidence: 75%

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Leaching behavior of selected trace elements in coal fly ash samples from Yenikoy coal-fired power plants

Akar

Polat

Galecki

et al. 2012

Fuel Processing Technology

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Keywords:Coal fly ash Coal-fired power plants Trace element leaching Short-term leaching test results of alkaline fly ash from Yenikoy coal-fired power plant were reported in this paper. ASTM D-3987-85 and TCLP-1311 test methods were applied to determine leaching behavior of selected elements namely, Fe, Ca, Cu, Co, Cd, Mn, Ni, Pb Zn, and Cr (VI) at different particle size fractions and test conditions. Chemical, mineralogical and morphological characterizations of ash samples were also performed using chemical, XRD and SEM-EDS analysis methods. The results showed that CaO dominates in the Yenikoy fly ash sample which directly affects the mobility of trace elements by determining the pH of the leaching medium. Higher mobility values of Cd, Co Cu, Pb, Ni and Zn elements were observed for TCLP-1311 procedure. The concentration of these elements in leachates showed a tendency to increase by decreasing particle size. Overall results suggested that the amount of the selected elements in the final leachates of both tests was lower than the limit values of landfill regulations except Cr (VI).

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Section: Results Of the Toxicity Test Procedurescontrasting

confidence: 60%

Section: Results Of the Toxicity Test Proceduresmentioning

confidence: 88%

Section: Physical and Chemical Characterization Of Fly Ash Samplementioning

confidence: 75%

See 1 more Smart Citation

Leaching behavior of selected trace elements in coal fly ash samples from Yenikoy coal-fired power plants

Akar

Polat

Galecki

et al. 2012

Fuel Processing Technology

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show abstract

“…2 There have been reports on the relationship between the particle size of the fly ash and its chemical composition. [2][3][4]11,[13][14][15][16][17][18][19][20][21][22][23] Generally the metal content tends to increase as the particle size decreases. This dependency is prominent for particles smaller than 50 m and for the more volatile metals such as Pb, Cu, Cd, As, Zn, etc.…”

Section: Introductionmentioning

confidence: 99%

“…This dependency is prominent for particles smaller than 50 m and for the more volatile metals such as Pb, Cu, Cd, As, Zn, etc. 20,21,24 This increase in the metal content is likely due to increased surface area with decreasing particle size. Analysis of particle size distribution of fly ash is thus important for understanding of the environmental effect of fly ash.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fly Ash by Field-Flow Fractionation Combined with SPLITT Fractionation and Compositional Analysis by ICP-OES

Kang¹,

Eum²,

Lee³

2014

Bulletin of the Korean Chemical Society

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Accurate analysis of fly ash particles is not trivial because of complex nature in physical and chemical properties. SPLITT fractionation (SF) was employed to fractionate the fly ash particles into subpopulations in large quantities. Then the SF-fractions were analyzed by the steric mode of sedimentation field-flow fractionation (Sd/StFFF) for size analysis. The SF-fractions were also analyzed by ICP-OES. The results showed that the fly ash is mainly composed of Fe, Ca, Mg and Mn. No particular trends were observed between the particle size and the concentrations of Fe, Ca, Mg, while Mn, Cu and Zn were in higher concentrations in smaller particles. Sample preparation procedures were established, where the fly ash particles were sieved to remove large contaminants, and then washed with acetone to remove organics on the surface of particles. The sample preparation and analysis methods developed in this study could be applied to other environmental particles.

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Valorization of Wastes for the Remediation of Toxicants from Industrial Wastewater

Kiran

Gulzar

Iqbal

et al. 2019

Integrating Green Chemistry and Sustainable Engineering

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Heavy metal characterization of CFB-derived coal fly ash

Cited by 103 publications

References 23 publications

Leaching behavior of selected trace elements in coal fly ash samples from Yenikoy coal-fired power plants

Leaching behavior of selected trace elements in coal fly ash samples from Yenikoy coal-fired power plants

Characterization of Fly Ash by Field-Flow Fractionation Combined with SPLITT Fractionation and Compositional Analysis by ICP-OES

Valorization of Wastes for the Remediation of Toxicants from Industrial Wastewater

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