Estimation of Trace Elements in Fly Ash Released from Coal Combustion

Abstract

Qingshan Thermoelectric Plant located in Wuhan City, Hubei Province, China, and it uses coal as a fuel. Coal combustion generates not only gaseous pollutants like SO2 and NOx but also toxic and heavy metals to the atmosphere. From the environmental point of view, the determination and speciation of trace toxic and heavy metals released from coal combustion are very important. In this work, the atomic spectroscopic methods for determination of some trace elements were first established. Graphite furnace atomic absorption spectrometry (GFAAS) method was used to determine the trace Pb in standard reference material SRM 8322 (fly ash from combustion of pulverized coal). The hydride generation atomic absorption spectrometry coupled with flow injection analysis (HGAAS-FIA) was used to analyze the concentration of As in SRM 8322 and the ICP-AES for determination of trace elements Co, Ni, Cu, Cr, etc. For the laboratory research work, all the coal samples were digested with a mixture of acids (HNO3-HF-HCLO4) after burned at 650℃ for one hour. Based on the establishment of atomic spectroscopic determination methods Tessier sequential speciation and separation methods were used in the studies of speciation distribution of some heavy metals in fine particles released from coal combustion of Qingshan Thermoelectric Plant. The transition elements in two samples from Qingshan Thermoelectric Plant (with different combustion condition) were extracted into five fractions by sequential extraction. In each fraction a suitable reagents with an optimum pH and time were used. Centrifugate separation of liquid part from the solid part was used after each fraction, the liquid part is taken for analysis and the solid part was extracted with a suitable reagents for the next fraction and the reaction continued for certain time. This procedure was done for the five fractions (exchangeable, carbonate bounded, Fe-Mn oxide bounded, organic matter bounded and residual). The experiment of the stimulant acid rain reacted with coal ash were also done in order to evaluate the transformation of these trace elements into water system after the fine particles of coal ash act with acid rain. The results showed that most parts of the metal in particles are stable. In order to study the distribution tendency of trace elements in coal, the separation of different coal particles were done using organic solvent extraction and gravity settlement method. The results showed that different trace elements had different distribution tendency in coal.

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Eltayeib, A. (2014) Estimation of Trace Elements in Fly Ash Released from Coal Combustion. Open Access Library Journal, 1, 1-12. doi: 10.4236/oalib.1100432.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] Raeva, A.A., Klykov, O.V., Kozliak, E.I., Pieerce, D.T. and Seames, W.S. (2011) In Situ Evaluation of Inorganic Matrix Effects on the Partitioning of Three Trace Elements (As, Sb, Se) at the Outset of Coal Combustion. Energy and Fuels, 25, 4290-4298.
http://dx.doi.org/10.1021/ef200879j
[2] Willett, J.C., Finkelman, R.B., Mrocz Kowski, S.J., Palmer, C.A. and Koller, A. (2000) Semi-Quantitative Determination of the Modes of Occurrence of Elements in Coal: Results from an International Round Robin Project. Final Report, U.S. Geological Survey, Reston, 45 p.
[3] Davison, R.L., Natusch, D.F.S., Wallace, J.R. and Evans, C.A. (1974) Trace Elements in Fly Ash. Dependence of Concentration on Particle Size. Environmental Science and Technology, 8, 1107-1113.
http://dx.doi.org/10.1021/es60098a003
[4] Dale, L.S. and Chapman, J.F. (1999) IEA Collaborative Project on the Modes of Occurrence of Trace Elements in Coal (Phase 1). Final Report, Lucas Heights, NSW, Australia, Commonwealth Scientific and Industrial Research Organization, Division of Energy Technology, 18 p.
[5] Nelson, P.F. (2007) Trace Metal Emission in Fine Particles from Coal Combustion. Energy and Fuels, 21, 477-484.
http://dx.doi.org/10.1021/ef060405q
[6] Chen, H.H., Laskin, A., Baltrusaitis, J., Groski, C.A., Scherer, M.M. and Grassian, V.H. (2012) Coal Fly Ash as a Source of Iron in Atmospheric Dust. Environmental Science and Technology, 46, 2112-2120.
http://dx.doi.org/10.1021/es204102f
[7] Slavin, W., Manning, D.C. and Camrick, G.R. (1981) Atomic Spectroscopy, 2, 137.
[8] Weiz, B., et al. (1992) Time-Based and Volume-Based Sampling for Flow-Injection On-Line Sorbent Extraction Graphite Furnace Atomic Absorption Spectrometry. Analytica Chimica Acta, 261, 477-487.
http://dx.doi.org/10.1016/0003-2670(92)80229-Z
[9] Fang, Z. and Weiz, B.J. (1989) High Efficiency Low Sample Consumption On-Line Ion-Exchange Pre-Concentration System for Flow Injection Flame Atomic Absorption Spectrometry. Journal of Analytical Atomic Spectrometry, 4, 543-546.
http://dx.doi.org/10.1039/ja9890400543
[10] Ruzicka, J. and Arndal, A. (1989) Sorbent Extraction in Flow Injection Analysis and Its Application to Enhancement of Atomic Spectrometry. Analytica Chimica Acta, 216, 243-255.
http://dx.doi.org/10.1016/S0003-2670(00)82011-5
[11] Fang, Z., Guo, T. and Weiz, B. (1991) Determination of Cadmium, Lead and Copper in Water Samples by Flame Atomic-Absorption Spectrometry with Preconcentration by Flow-Injection On-Line Sorbent Extraction. Talanta, 38, 613-619.
http://dx.doi.org/10.1016/0039-9140(91)80144-O
[12] Malamas, F., Bengtsson, M. and Johansson, G. (1984) On-Line Trace Metal Enrichment and Matrix Isolation in Atomic Absorption Spectrometry by a Column Containing Immobilized 8-Quinolinol in a Flow-Injection System. Analytica Chimica Acta, 160, 1-10.
http://dx.doi.org/10.1016/S0003-2670(00)84503-1
[13] Nakashima, S., Sturgeon, R.E., Willie, S.N. and Berman, S.S. (1988) Determination of Trace Metals in Seawater by Graphite Furnace Atomic Absorption Spectrometry with Preconcentration on Silica-Immobilized 8-Hydroxyquinoline in a Flow-System. Fresenius’ Zeitschrift für Analytische Chemie, 330, 592-595.
http://dx.doi.org/10.1007/BF00473773
[14] Fang, Z., Sperling, M. and Welz, B. (1990) Flow Injection On-Line Sorbent Extraction Pre-Concentration for Graphite Furnace Atomic Absorption Spectrometry. Journal of Analytical Atomic Spectrometry, 5, 639-646.
http://dx.doi.org/10.1039/ja9900500639
[15] Schlemmer, G. and Grobenski, Z. (1990) Determination of Arsenic, Cadmium, Lead and Selenium in Highly Mineralized Waters by Graphite-Furnace Atomic-Absorption Spectrometry. Talanta, 37, 545-553.
http://dx.doi.org/10.1016/0039-9140(90)80195-L
[16] Sanady, M.C. (1978) Hidrol, Kozl., 58, 193.
[17] Raje, N., Kayasth, S., Asari, T.P.S. and Gangadharan, S. (1994) Proconcentration of Trace Elements from High-Purity Thorium and Uranium on Chelex-100 and Determination by Graphite Furnace Atomic Absorption Spectrometry with Zeeman-Effect Background Correction. Analytica Chimica Acta, 290, 371-377.
http://dx.doi.org/10.1016/0003-2670(94)80125-8
[18] Gupta, J.G.S. and Bouvier, J.L. (1995) Direct Determination of Traces of Ag, Cd, Pb, Bi, Cr, Mn, Co, Ni, Li, Be, Cu and Sb in Environmental Waters and Geological Materials by Simultaneous Multi-Element Graphite Furnace Atomic Absorption Spectrometry with Zeeman-Effect Background Correction. Talanta, 42, 269-281.
http://dx.doi.org/10.1016/0039-9140(94)00256-R
[19] Minezewski, J., Ska, J.C. and Dybezynski, R. (1982) Separation and Preconcentration Methods in Inorganic Trace Analysis. Ellis Horwood, Chichester, 37.
[20] Mizuike, A. (1983) Enrichment Techniques for Inorganic Trace Analysis. Springer, Berlin, 56.
[21] Zolotov, Y.A. and Kuzmin, N.M. (1990) Preconcentration of Trace Elements. Elsevier, Amsterdam, 79.
[22] Hiraide, M., Chen, Z., Sugimoto, K. and Kawaaguchi, H. (1995) Coprecipitation with Tin(IV) Hydroxide Followed by Removal of Tin Carrier for the Determination of Trace Heavy Metals by Graphite-Furnace Atomic Absorption Spectrometry. Analytica Chimica Acta, 302, 103-107.
http://dx.doi.org/10.1016/0003-2670(94)00427-N
[23] Hendrikse, P.W., Slikkerveer, F.J., Zaalberg, J. and Hautfenne, A. (1988) Determination of Copper, Iron and Nickel in Oils and Fats by Direct Graphite Furnace Atomic Absorption Spectrometry: Results of a Collaborative Study and the Standardised Method. Pure and Applied Chemistry, 60, 893-900.
http://dx.doi.org/10.1351/pac198860060893
[24] van Dalen, G. and Galan, L.D. (1994) Direct Determination of Particulate Elements in Edible Oils and Fats Using an Ultrasonic Slurry Sampler with Graphite Furnace Atomic Absorption Spectrometry. Spectrochimica Acta Part B: Atomic Spectroscopy, 49, 1689-1693.
http://dx.doi.org/10.1016/0584-8547(94)80140-1
[25] Howard, A.G. and Arab-Zavar, M.H. (1981) Determination of “Inorganic” Arsenic(III) and Arsenic(V), “Methylarsenic” and “Dimethylarsenic” Species by Selective Hydride Evolution Atomic-Absorption Spectroscopy. Analyst (London), 106, 213-220.
http://dx.doi.org/10.1039/an9810600213
[26] Ebdon, L., Wilkinson, J.R. and Jackson, K.W. (1982) A Simple and Sensitive Continuous Hydride Generation System for the Determination of Arsenic and Selenium by Atomic Absorption and Atomic Fluorescence Spectrometry. Analytica Chimica Acta, 136, 191-199.
http://dx.doi.org/10.1016/S0003-2670(01)95378-4
[27] Subramanian, K.S. and Méranger, J.C. (1982) Rapid Hydride Evolution-Electrothermal Atomisation Atomic-Absorption Spectrophotometric Method for Determining Arsenic and Selenium in Human Kidney and Liver. Analyst (London), 107, 157-162.
http://dx.doi.org/10.1039/an9820700157
[28] Ruzicka, J. and Hansen, E.H. (1981) Flow Injection Analysis. Wiley, New York.
[29] Tyson, J.F., Appiten, J.M.H. and Idris, A.B. (1983) Flow Injection Sample Introduction Methods for Atomic-Absorption Spectrometry. Analyst (London), 108, 153-158.
http://dx.doi.org/10.1039/an9830800153
[30] Nakazawa, H., Takabatake, E., Hino, S. and Mtema, C.A. (1983) Simultaneous Determination of Sulfamonomethoxine, Dinitolmide, Ethopabate, Sulfadimethoxine, and Sulfaquinoxaline in Chicken Tissues by High Performance Liquid Chromatography. Bunseki Kagaku, 32, 179-183.
http://dx.doi.org/10.2116/bunsekikagaku.32.3_179
[31] Zhou, N., Frech, W. and Lundberg, E. (1983) Rapid Determination of Lead, Bismuth, Antimony and Silver in Steels by Flame Atomic Absorption Spectrometry Combined with Flow Injection Analysis. Analytica Chimica Acta, 153, 23-31.
http://dx.doi.org/10.1016/S0003-2670(00)85484-7
[32] Olson, S., Pessenda, L.C., Ruzicka, J. and Hansen, E.H. (1983) Combination of Flow Injection Analysis with Flame Atomic-Absorption Spectrophotometry: Determination of Trace Amounts of Heavy Metals in Polluted Seawater. Analyst (London), 108, 905-917.
http://dx.doi.org/10.1039/an9830800905
[33] Kamson, O.F. and Townshend, A. (1983) Ion-Exchange Removal of Some Interferences on the Determination of Calcium by Flow Injection Analysis and Atomic Absorption Spectrometry. Analytica Chimica Acta, 155, 253-257.
http://dx.doi.org/10.1016/S0003-2670(00)85601-9
[34] Nord, L. and Karlberg, B. (1983) Sample Preconcentration by Continuous Flow Extraction with a Flow Injection Atomic Absorption Detection System. Analytica Chimica Acta, 145, 151-158.
http://dx.doi.org/10.1016/0003-2670(83)80057-9
[35] Skeggs, L.T. (1957) An Automatic Method for Colorimetric Analyses. American Journal of Clinical Pathology, 28, 311.
[36] Manabu, Y., Yasuda, M. and Yuroku, Y. (1985) Analytical Chemistry, 57, 1382-1385.
[37] Hisatake, N. and Masahiko, I. (1984) Automated Determination of Arsenic and Selenium by Atomic Absorption Spectrometry with Hydride Generation. Analytical Chemistry, 56, 2059-2063.
http://dx.doi.org/10.1021/ac00276a018
[38] Bernhard, W. and Sucmanová, M. (1993) L-Cysteine as a Reducing and Releasing Agent for the Determination of Antimony and Arsenic Using Flow Injection Hydride Generation Atomic Absorption Spectrometry—Part 2. Interference Studies and the Analysis of Copper and Steel. Analyst, 118, 1425-1432.
http://dx.doi.org/10.1039/an9931801425
[39] Kheboian, C. and Bauer, C.F. (1987) Accuracy of Selective Extraction Procedures for Metal Speciation in Model Aquatic Sediments. Analytical Chemistry, 59, 1417-1423.
http://dx.doi.org/10.1021/ac00137a010
[40] Tessier, A., Campbell, P.G.C. and Bisson, M. (1979) Sequential Extraction Procedure for the Speciation of Particulate Trace Metals. Analytical Chemistry, 51, 844-851.
http://dx.doi.org/10.1021/ac50043a017
[41] Jouanneau, J.M., Latouche, C. and Pautrizel, F. (1983) Analyse critique des extractions sequentielles a travers l’etude de quelques constituants des residus d’attaque critical analysis of sequential extractions through the study of several attack constituent residues. Environmental Technology Letters, 4, 509-514.
http://dx.doi.org/10.1080/09593338309384240
[42] Maher, W.A. (1984) Evaluation of a Sequential Extraction Scheme to Study Associations of Trace Elements in Estuarine and Oceanic Sediments. Bulletin of Environmental Contamination and Toxicology, 32, 339-344.
http://dx.doi.org/10.1007/BF01607507
[43] Rendell, P.S., Batley, G.E. and Cameron, A.J. (1980) Adsorption as a Control of Metal Concentrations in Sediment Extracts. Environmental Science Technology, 14, 314-318.
http://dx.doi.org/10.1021/es60163a002
[44] Rapin, F. and Forstner, U. (1983) Processing of the 4th International Conference on Heavy Metals in the Environment. CEP Consultant LTD., Heidelberg, Edinburgh, 1074-1077.
[45] Tipping, E., Hetherington, N.B., Hilton, J., Thompson, D.W., Bowles, E. and Hamilton-Taylor, J. (1985) Artifacts in the Use of Selective Chemical Extraction to Determine Distributions of Metals between Oxides of Manganese and Iron. Analytical Chemistry, 57, 1944-1946.
http://dx.doi.org/10.1021/ac00286a035

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