PREPARATION OF ZEOLITIC ADSORBENTS FROM WASTE COAL FLY ASH

Shin BS; Lee SO; Kook NP

Korean Journal of Chemical Engineering, Vol.12, No.3, 352-357, July, 1995

Power plants burning coal generate a large amount of fly ash as waste matter. The objective of this study is to produce zeolitic adsorbents that possesses high adsorptive capacity for toxic cations. The sample was first pretreated with a High Intensity Magnetic Separator for the removal of iron and magnetic materials (mainly Fe₂O₃ and TiO₂). The zeolitic adsorbents were prepared under the various conditions of NaOH concentration (1-5N), reaction time from 3 to 96 hours and at the various temperatures of 60, 80 and 100℃. The results of the experiment showed that the coal fly ash should be synthesized with 4 N NaOH for 48 hours at 100℃ in order to have good adsorptive capacity. The zeolitic adsorbents showed higher cation exchange capacity values than the natural zeolite in removing NH₄⁺, Pb²⁺, Ca²⁺ and Cd²⁺ ions.

Keywords:Zeolitic Adsorbents;HIMS;CEC;Coal Fly Ash;Waste Water Treatment

[References]

Barrer RM, "Hydrothemal Chemistry of Zeolites," Academic Press (1982)
Break DW, "Zeolite Molecular Sieves," John Wiley & Sons Inc. (1974)
Fanor M, Fabio R, Ligia S, Jaime E, Jose R, Fuel, 69, 263 (1990)
Fisher GL, Natusch DFS, "In Analytical Methods for Coal and Coal Products," Academic Press, N.Y., U.S.A., 3, 489 (1978)
Falcone SK, Schobert HH, Rindt DK, Braun S, Am. Chem. Soc. Div. Fuel Chem. Prepr., 29(4), 76 (1984)
Hara N, "Zeolite: Introduction and Application," Tokyo, Japan, 300 (1975)
Jorgensen SE, Barkaes K, Water Res., 10, 213 (1974)
Munson RA, Sheppard RA, Miner. Sci. Eng., 6(1), 19 (1974)
Natush DFS, Taylor DR, "Environmental Effects of Western Coal Combution: Part IV," Environ. Research Lab., Duluth, Mn., U.S.A. (1980)
Sand LB, "Synthesis or Large-port and Small-port Mordenite," Molecular Sieves, London, Soc. Chem. Ind., 71 (1968)
Shepard AO, Starkey HC, "Effect on Cation Exchange on the Thermal Behavior of Heulandite and Clinoptilolite," U.S. Goel. Survey Prof. 475-D, 89 (1963)
Shin BS, Choi KS, Kim JU, J. Korean Inst. Miner. Mining Eng., 24(3), 202 (1987)
Shin BS, Jung CJ, Choi SJ, Oh JG, Choi KS, J. Korean Inst. Miner. Mining Eng., 19(2), 143 (1982)
Szostak R, "Molecular-Sieves-Principles of Synthesis and Identification," Van Nostrano Reinhold (1989)
Wills BA, "Mineral Processing Technology," Pergamon Press, 4 (1988)
Haruna J, "Synthesis of Zeolite from Fly Ash," Japan Patent, 90-229709 (1990)
Clean Japan Center, "Introduction of a Demonstration Plant for the Production of Zeolite from Fly Ash," (1991)
Korea Coal Industry Promotion Board, "A Study on the Support System of the Government for Inducement of Facility Investment on Coal Mining," (1992)

[Referenced By]

[1] Barrer RM, "Hydrothemal Chemistry of Zeolites," Academic Press (1982)

[2] Break DW, "Zeolite Molecular Sieves," John Wiley & Sons Inc. (1974)

[3] Fanor M, Fabio R, Ligia S, Jaime E, Jose R, Fuel, 69, 263 (1990)

[4] Fisher GL, Natusch DFS, "In Analytical Methods for Coal and Coal Products," Academic Press, N.Y., U.S.A., 3, 489 (1978)

[5] Falcone SK, Schobert HH, Rindt DK, Braun S, Am. Chem. Soc. Div. Fuel Chem. Prepr., 29(4), 76 (1984)

[6] Hara N, "Zeolite: Introduction and Application," Tokyo, Japan, 300 (1975)

[7] Jorgensen SE, Barkaes K, Water Res., 10, 213 (1974)

[8] Munson RA, Sheppard RA, Miner. Sci. Eng., 6(1), 19 (1974)

[9] Natush DFS, Taylor DR, "Environmental Effects of Western Coal Combution: Part IV," Environ. Research Lab., Duluth, Mn., U.S.A. (1980)

[10] Sand LB, "Synthesis or Large-port and Small-port Mordenite," Molecular Sieves, London, Soc. Chem. Ind., 71 (1968)

[11] Shepard AO, Starkey HC, "Effect on Cation Exchange on the Thermal Behavior of Heulandite and Clinoptilolite," U.S. Goel. Survey Prof. 475-D, 89 (1963)

[12] Shin BS, Choi KS, Kim JU, J. Korean Inst. Miner. Mining Eng., 24(3), 202 (1987)

[13] Shin BS, Jung CJ, Choi SJ, Oh JG, Choi KS, J. Korean Inst. Miner. Mining Eng., 19(2), 143 (1982)

[14] Szostak R, "Molecular-Sieves-Principles of Synthesis and Identification," Van Nostrano Reinhold (1989)

[15] Wills BA, "Mineral Processing Technology," Pergamon Press, 4 (1988)

[16] Haruna J, "Synthesis of Zeolite from Fly Ash," Japan Patent, 90-229709 (1990)

[17] Clean Japan Center, "Introduction of a Demonstration Plant for the Production of Zeolite from Fly Ash," (1991)

[18] Korea Coal Industry Promotion Board, "A Study on the Support System of the Government for Inducement of Facility Investment on Coal Mining," (1992)